Disallow creating read-only memslots that support GUEST_MEMFD, as
GUEST_MEMFD is fundamentally incompatible with KVM's semantics for
read-only memslots. Read-only memslots allow the userspace VMM to emulate
option ROMs by filling the backing memory with readable, executable code
and data, while triggering emulated MMIO on writes. GUEST_MEMFD doesn't
currently support writes from userspace and KVM doesn't support emulated
MMIO on private accesses, i.e. the guest can only ever read zeros, and
writes will always be treated as errors.
Cc: Fuad Tabba <tabba@google.com>
Cc: Michael Roth <michael.roth@amd.com>
Cc: Isaku Yamahata <isaku.yamahata@gmail.com>
Cc: Yu Zhang <yu.c.zhang@linux.intel.com>
Cc: Chao Peng <chao.p.peng@linux.intel.com>
Fixes: a7800aa80e ("KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory")
Link: https://lore.kernel.org/r/20240222190612.2942589-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
- Check for the validity of interrupts handled by a MOVALL
command
- Check for the validity of interrupts while reading the
pending state on enabling LPIs.
-----BEGIN PGP SIGNATURE-----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=cHkQ
-----END PGP SIGNATURE-----
Merge tag 'kvmarm-fixes-6.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.8, take #3
- Check for the validity of interrupts handled by a MOVALL
command
- Check for the validity of interrupts while reading the
pending state on enabling LPIs.
It is possible that an LPI mapped in a different ITS gets unmapped while
handling the MOVALL command. If that is the case, there is no state that
can be migrated to the destination. Silently ignore it and continue
migrating other LPIs.
Cc: stable@vger.kernel.org
Fixes: ff9c114394 ("KVM: arm/arm64: GICv4: Handle MOVALL applied to a vPE")
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240221092732.4126848-3-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>
vgic_get_irq() may not return a valid descriptor if there is no ITS that
holds a valid translation for the specified INTID. If that is the case,
it is safe to silently ignore it and continue processing the LPI pending
table.
Cc: stable@vger.kernel.org
Fixes: 33d3bc9556 ("KVM: arm64: vgic-its: Read initial LPI pending table")
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240221092732.4126848-2-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>
- Avoid dropping the page refcount twice when freeing an unlinked
page-table subtree.
-----BEGIN PGP SIGNATURE-----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=Coky
-----END PGP SIGNATURE-----
Merge tag 'kvmarm-fixes-6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.8, take #2
- Avoid dropping the page refcount twice when freeing an unlinked
page-table subtree.
- Don't source the VFIO Kconfig twice
- Fix protected-mode locking order between kvm and vcpus
-----BEGIN PGP SIGNATURE-----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=wb0z
-----END PGP SIGNATURE-----
Merge tag 'kvmarm-fixes-6.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.8, take #1
- Don't source the VFIO Kconfig twice
- Fix protected-mode locking order between kvm and vcpus
- Remove redundant newlines from error messages.
- Delete an unused variable in the AMX test (which causes build failures when
compiling with -Werror).
- Fail instead of skipping tests if open(), e.g. of /dev/kvm, fails with an
error code other than ENOENT (a Hyper-V selftest bug resulted in an EMFILE,
and the test eventually got skipped).
- Fix TSC related bugs in several Hyper-V selftests.
- Fix a bug in the dirty ring logging test where a sem_post() could be left
pending across multiple runs, resulting in incorrect synchronization between
the main thread and the vCPU worker thread.
- Relax the dirty log split test's assertions on 4KiB mappings to fix false
positives due to the number of mappings for memslot 0 (used for code and
data that is NOT being dirty logged) changing, e.g. due to NUMA balancing.
- Have KVM's gtod_is_based_on_tsc() return "bool" instead of an "int" (the
function generates boolean values, and all callers treat the return value as
a bool).
-----BEGIN PGP SIGNATURE-----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=infW
-----END PGP SIGNATURE-----
Merge tag 'kvm-x86-selftests-6.8-rcN' of https://github.com/kvm-x86/linux into HEAD
KVM selftests fixes/cleanups (and one KVM x86 cleanup) for 6.8:
- Remove redundant newlines from error messages.
- Delete an unused variable in the AMX test (which causes build failures when
compiling with -Werror).
- Fail instead of skipping tests if open(), e.g. of /dev/kvm, fails with an
error code other than ENOENT (a Hyper-V selftest bug resulted in an EMFILE,
and the test eventually got skipped).
- Fix TSC related bugs in several Hyper-V selftests.
- Fix a bug in the dirty ring logging test where a sem_post() could be left
pending across multiple runs, resulting in incorrect synchronization between
the main thread and the vCPU worker thread.
- Relax the dirty log split test's assertions on 4KiB mappings to fix false
positives due to the number of mappings for memslot 0 (used for code and
data that is NOT being dirty logged) changing, e.g. due to NUMA balancing.
- Have KVM's gtod_is_based_on_tsc() return "bool" instead of an "int" (the
function generates boolean values, and all callers treat the return value as
a bool).
- Make a KVM_REQ_NMI request while handling KVM_SET_VCPU_EVENTS if and only
if the incoming events->nmi.pending is non-zero. If the target vCPU is in
the UNITIALIZED state, the spurious request will result in KVM exiting to
userspace, which in turn causes QEMU to constantly acquire and release
QEMU's global mutex, to the point where the BSP is unable to make forward
progress.
- Fix a type (u8 versus u64) goof that results in pmu->fixed_ctr_ctrl being
incorrectly truncated, and ultimately causes KVM to think a fixed counter
has already been disabled (KVM thinks the old value is '0').
- Fix a stack leak in KVM_GET_MSRS where a failed MSR read from userspace
that is ultimately ignored due to ignore_msrs=true doesn't zero the output
as intended.
-----BEGIN PGP SIGNATURE-----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=92ae
-----END PGP SIGNATURE-----
Merge tag 'kvm-x86-fixes-6.8-rcN' of https://github.com/kvm-x86/linux into HEAD
KVM x86 fixes for 6.8:
- Make a KVM_REQ_NMI request while handling KVM_SET_VCPU_EVENTS if and only
if the incoming events->nmi.pending is non-zero. If the target vCPU is in
the UNITIALIZED state, the spurious request will result in KVM exiting to
userspace, which in turn causes QEMU to constantly acquire and release
QEMU's global mutex, to the point where the BSP is unable to make forward
progress.
- Fix a type (u8 versus u64) goof that results in pmu->fixed_ctr_ctrl being
incorrectly truncated, and ultimately causes KVM to think a fixed counter
has already been disabled (KVM thinks the old value is '0').
- Fix a stack leak in KVM_GET_MSRS where a failed MSR read from userspace
that is ultimately ignored due to ignore_msrs=true doesn't zero the output
as intended.
kvm_pgtable_stage2_free_unlinked() does the final put_page() on the
root page of the sub-tree before returning, so remove the additional
put_page() invocations in the callers.
Cc: Ricardo Koller <ricarkol@google.com>
Fixes: f6a27d6dc5 ("KVM: arm64: Drop last page ref in kvm_pgtable_stage2_free_removed()")
Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240212193052.27765-1-will@kernel.org
timers have been migrated on the CPU down path and thus said timer
will get ignored
-----BEGIN PGP SIGNATURE-----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=+SjG
-----END PGP SIGNATURE-----
Merge tag 'timers_urgent_for_v6.8_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Borislav Petkov:
- Make sure a warning is issued when a hrtimer gets queued after the
timers have been migrated on the CPU down path and thus said timer
will get ignored
* tag 'timers_urgent_for_v6.8_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
hrtimer: Report offline hrtimer enqueue
such hw can boot again
- Do not take into accout XSTATE buffer size info supplied by userspace
when constructing a sigreturn frame
- Switch get_/put_user* to EX_TYPE_UACCESS exception handling when an
MCE is encountered so that it can be properly recovered from instead
of simply panicking
-----BEGIN PGP SIGNATURE-----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=b7B7
-----END PGP SIGNATURE-----
Merge tag 'x86_urgent_for_v6.8_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Correct the minimum CPU family for Transmeta Crusoe in Kconfig so
that such hw can boot again
- Do not take into accout XSTATE buffer size info supplied by userspace
when constructing a sigreturn frame
- Switch get_/put_user* to EX_TYPE_UACCESS exception handling when an
MCE is encountered so that it can be properly recovered from instead
of simply panicking
* tag 'x86_urgent_for_v6.8_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/Kconfig: Transmeta Crusoe is CPU family 5, not 6
x86/fpu: Stop relying on userspace for info to fault in xsave buffer
x86/lib: Revert to _ASM_EXTABLE_UA() for {get,put}_user() fixups
issues or aren't considered to be needed in earlier kernel versions.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZcfLvgAKCRDdBJ7gKXxA
joCTAP4/XdBXA7Sj3GyjSAkYjg2U0quwX9oRhsx2Qy9duPDaLAD+NRl9XG14YSOB
f/7OiTQoDfnwVgHAOVBHY/ylrcgZRQg=
=2wdS
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2024-02-10-11-16' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"21 hotfixes. 12 are cc:stable and the remainder pertain to post-6.7
issues or aren't considered to be needed in earlier kernel versions"
* tag 'mm-hotfixes-stable-2024-02-10-11-16' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (21 commits)
nilfs2: fix potential bug in end_buffer_async_write
mm/damon/sysfs-schemes: fix wrong DAMOS tried regions update timeout setup
nilfs2: fix hang in nilfs_lookup_dirty_data_buffers()
MAINTAINERS: Leo Yan has moved
mm/zswap: don't return LRU_SKIP if we have dropped lru lock
fs,hugetlb: fix NULL pointer dereference in hugetlbs_fill_super
mailmap: switch email address for John Moon
mm: zswap: fix objcg use-after-free in entry destruction
mm/madvise: don't forget to leave lazy MMU mode in madvise_cold_or_pageout_pte_range()
arch/arm/mm: fix major fault accounting when retrying under per-VMA lock
selftests: core: include linux/close_range.h for CLOSE_RANGE_* macros
mm/memory-failure: fix crash in split_huge_page_to_list from soft_offline_page
mm: memcg: optimize parent iteration in memcg_rstat_updated()
nilfs2: fix data corruption in dsync block recovery for small block sizes
mm/userfaultfd: UFFDIO_MOVE implementation should use ptep_get()
exit: wait_task_zombie: kill the no longer necessary spin_lock_irq(siglock)
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats
fs/proc: do_task_stat: move thread_group_cputime_adjusted() outside of lock_task_sighand()
getrusage: use sig->stats_lock rather than lock_task_sighand()
getrusage: move thread_group_cputime_adjusted() outside of lock_task_sighand()
...
-----BEGIN PGP SIGNATURE-----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=0mLS
-----END PGP SIGNATURE-----
Merge tag 'block-6.8-2024-02-10' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe:
- NVMe pull request via Keith:
- Update a potentially stale firmware attribute (Maurizio)
- Fixes for the recent verbose error logging (Keith, Chaitanya)
- Protection information payload size fix for passthrough (Francis)
- Fix for a queue freezing issue in virtblk (Yi)
- blk-iocost underflow fix (Tejun)
- blk-wbt task detection fix (Jan)
* tag 'block-6.8-2024-02-10' of git://git.kernel.dk/linux:
virtio-blk: Ensure no requests in virtqueues before deleting vqs.
blk-iocost: Fix an UBSAN shift-out-of-bounds warning
nvme: use ns->head->pi_size instead of t10_pi_tuple structure size
nvme-core: fix comment to reflect right functions
nvme: move passthrough logging attribute to head
blk-wbt: Fix detection of dirty-throttled tasks
nvme-host: fix the updating of the firmware version
This pull request includes the change to accelerate the device detection
step in some cases.
In the self-identification step after bus-reset, all of nodes in the same
bus broadcast selfID packet including the value of gap count. The value is
related to the cable hops between nodes, and used to calculate the
subaction gap and the arbitration reset gap. When each node has the
different value of the gap count, the asynchronous communication between
them is unreliable, since an asynchronous transaction could be interrupted
by another asynchronous transaction before completion. The gap count
inconsistency can be resolved by several ways; e.g. the transfer of PHY
configuration packet and generation of bus-reset.
Current implementation of firewire stack can correctly detect the gap
count inconsistency, however the recovery action from the inconsistency
tends to be delayed after reading configuration ROM of root node. This
results in the long time to probe devices in some combinations of
hardware. In the pull request, the stack is changed to schedule the
action immediately as possible.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQQE66IEYNDXNBPeGKSsLtaWM8LwEwUCZcdgUwAKCRCsLtaWM8Lw
E8m+AQC9UnqCusCYwusAz/yVEiOjW+kHIxv7it3y3U3cRqCUFgEA7B7HsF3X2lNm
k/geQajr0tOIGLl0MJRI3yNVsUtG9Q4=
=p3Jg
-----END PGP SIGNATURE-----
Merge tag 'firewire-fixes-6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire fix from Takashi Sakamoto:
"A change to accelerate the device detection step in some cases.
In the self-identification step after bus-reset, all nodes in the same
bus broadcast selfID packet including the value of gap count. The
value is related to the cable hops between nodes, and used to
calculate the subaction gap and the arbitration reset gap.
When each node has the different value of the gap count, the
asynchronous communication between them is unreliable, since an
asynchronous transaction could be interrupted by another asynchronous
transaction before completion. The gap count inconsistency can be
resolved by several ways; e.g. the transfer of PHY configuration
packet and generation of bus-reset.
The current implementation of firewire stack can correctly detect the
gap count inconsistency, however the recovery action from the
inconsistency tends to be delayed after reading configuration ROM of
root node. This results in the long time to probe devices in some
combinations of hardware.
Here the stack is changed to schedule the action as soon as possible"
* tag 'firewire-fixes-6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: core: send bus reset promptly on gap count error
-----BEGIN PGP SIGNATURE-----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=exTN
-----END PGP SIGNATURE-----
Merge tag '6.8-rc3-ksmbd-server-fixes' of git://git.samba.org/ksmbd
Pull smb server fixes from Steve French:
"Two ksmbd server fixes:
- memory leak fix
- a minor kernel-doc fix"
* tag '6.8-rc3-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
ksmbd: free aux buffer if ksmbd_iov_pin_rsp_read fails
ksmbd: Add kernel-doc for ksmbd_extract_sharename() function
4 small fixes, 3 in drivers with the remaining core fix being a fixup
to the one in the last pull request which didn't entirely move
checking of scsi_host_busy() out from under the host lock.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
-----BEGIN PGP SIGNATURE-----
iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCZcakBiYcamFtZXMuYm90
dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishU5GAP9J3BgQ
evE/NZl5bOFobFRUWOaUwPCU+KzLR8odFBleHAD/SlAapQGDHLm7smUECbiHDVI+
j5T4CLY57a+UQzC8lUc=
=poH3
-----END PGP SIGNATURE-----
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Three small driver fixes and one core fix.
The core fix being a fixup to the one in the last pull request which
didn't entirely move checking of scsi_host_busy() out from under the
host lock"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: ufs: core: Remove the ufshcd_release() in ufshcd_err_handling_prepare()
scsi: ufs: core: Fix shift issue in ufshcd_clear_cmd()
scsi: lpfc: Use unsigned type for num_sge
scsi: core: Move scsi_host_busy() out of host lock if it is for per-command
-----BEGIN PGP SIGNATURE-----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=jOZH
-----END PGP SIGNATURE-----
Merge tag '6.8-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
- reconnect fix
- multichannel channel selection fix
- minor mount warning fix
- reparse point fix
- null pointer check improvement
* tag '6.8-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
smb3: clarify mount warning
cifs: handle cases where multiple sessions share connection
cifs: change tcon status when need_reconnect is set on it
smb: client: set correct d_type for reparse points under DFS mounts
smb3: add missing null server pointer check
files) and two cap handling fixes from Xiubo and Rishabh.
-----BEGIN PGP SIGNATURE-----
iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAmXGRJATHGlkcnlvbW92
QGdtYWlsLmNvbQAKCRBKf944AhHzi+/0B/4pEweAm2W0UUaaS59DecNySBFobwed
m7bBDBGIAQ/I3duN46a13FzsGNclho967TeB0ig1jrQxnoo3HEMiXpZz5xfG9spe
fyvrIk3R8cSqgd7YsyITnUjGGd2UBvZVrbWOCbWrKofSoflS6IjcGDQF7ZrgEsff
0KkMaWHvO6poIU2mAToV//UkWUk6RrtAUNlSdjLpizXnUrrAQ+vUA3OU9SSp6Klf
xmFaIiAiVZC6M8qFpXJtnIf8Ba7PrpW5InAXgCOkxDKciE9fLaPsIu0B3H9lUVKZ
TJwjEJ0nB+akh0tRO5bZKyM8j0D3lhgxphJwNtUoYjQsV3m7LcGQV+Il
=u953
-----END PGP SIGNATURE-----
Merge tag 'ceph-for-6.8-rc4' of https://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"Some fscrypt-related fixups (sparse reads are used only for encrypted
files) and two cap handling fixes from Xiubo and Rishabh"
* tag 'ceph-for-6.8-rc4' of https://github.com/ceph/ceph-client:
ceph: always check dir caps asynchronously
ceph: prevent use-after-free in encode_cap_msg()
ceph: always set initial i_blkbits to CEPH_FSCRYPT_BLOCK_SHIFT
libceph: just wait for more data to be available on the socket
libceph: rename read_sparse_msg_*() to read_partial_sparse_msg_*()
libceph: fail sparse-read if the data length doesn't match
-----BEGIN PGP SIGNATURE-----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=4Gkn
-----END PGP SIGNATURE-----
Merge tag 'ntfs3_for_6.8' of https://github.com/Paragon-Software-Group/linux-ntfs3
Pull ntfs3 fixes from Konstantin Komarov:
"Fixed:
- size update for compressed file
- some logic errors, overflows
- memory leak
- some code was refactored
Added:
- implement super_operations::shutdown
Improved:
- alternative boot processing
- reduced stack usage"
* tag 'ntfs3_for_6.8' of https://github.com/Paragon-Software-Group/linux-ntfs3: (28 commits)
fs/ntfs3: Slightly simplify ntfs_inode_printk()
fs/ntfs3: Add ioctl operation for directories (FITRIM)
fs/ntfs3: Fix oob in ntfs_listxattr
fs/ntfs3: Fix an NULL dereference bug
fs/ntfs3: Update inode->i_size after success write into compressed file
fs/ntfs3: Fixed overflow check in mi_enum_attr()
fs/ntfs3: Correct function is_rst_area_valid
fs/ntfs3: Use i_size_read and i_size_write
fs/ntfs3: Prevent generic message "attempt to access beyond end of device"
fs/ntfs3: use non-movable memory for ntfs3 MFT buffer cache
fs/ntfs3: Use kvfree to free memory allocated by kvmalloc
fs/ntfs3: Disable ATTR_LIST_ENTRY size check
fs/ntfs3: Fix c/mtime typo
fs/ntfs3: Add NULL ptr dereference checking at the end of attr_allocate_frame()
fs/ntfs3: Add and fix comments
fs/ntfs3: ntfs3_forced_shutdown use int instead of bool
fs/ntfs3: Implement super_operations::shutdown
fs/ntfs3: Drop suid and sgid bits as a part of fpunch
fs/ntfs3: Add file_modified
fs/ntfs3: Correct use bh_read
...
We've had issues with gcc and 'asm goto' before, and we created a
'asm_volatile_goto()' macro for that in the past: see commits
3f0116c323 ("compiler/gcc4: Add quirk for 'asm goto' miscompilation
bug") and a9f180345f ("compiler/gcc4: Make quirk for
asm_volatile_goto() unconditional").
Then, much later, we ended up removing the workaround in commit
43c249ea0b ("compiler-gcc.h: remove ancient workaround for gcc PR
58670") because we no longer supported building the kernel with the
affected gcc versions, but we left the macro uses around.
Now, Sean Christopherson reports a new version of a very similar
problem, which is fixed by re-applying that ancient workaround. But the
problem in question is limited to only the 'asm goto with outputs'
cases, so instead of re-introducing the old workaround as-is, let's
rename and limit the workaround to just that much less common case.
It looks like there are at least two separate issues that all hit in
this area:
(a) some versions of gcc don't mark the asm goto as 'volatile' when it
has outputs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98619https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110420
which is easy to work around by just adding the 'volatile' by hand.
(b) Internal compiler errors:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110422
which are worked around by adding the extra empty 'asm' as a
barrier, as in the original workaround.
but the problem Sean sees may be a third thing since it involves bad
code generation (not an ICE) even with the manually added 'volatile'.
but the same old workaround works for this case, even if this feels a
bit like voodoo programming and may only be hiding the issue.
Reported-and-tested-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/all/20240208220604.140859-1-seanjc@google.com/
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Uros Bizjak <ubizjak@gmail.com>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Andrew Pinski <quic_apinski@quicinc.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When a user tries to use the "sec=krb5p" mount parameter to encrypt
data on connection to a server (when authenticating with Kerberos), we
indicate that it is not supported, but do not note the equivalent
recommended mount parameter ("sec=krb5,seal") which turns on encryption
for that mount (and uses Kerberos for auth). Update the warning message.
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Based on our implementation of multichannel, it is entirely
possible that a server struct may not be found in any channel
of an SMB session.
In such cases, we should be prepared to move on and search for
the server struct in the next session.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
When a tcon is marked for need_reconnect, the intention
is to have it reconnected.
This change adjusts tcon->status in cifs_tree_connect
when need_reconnect is set. Also, this change has a minor
correction in resetting need_reconnect on success. It makes
sure that it is done with tc_lock held.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
* A fix for a missing TLB flush during early boot on SPARSEMEM_VMEMMAP
configurations.
* A handful of fixes to correctly implement the break-before-make
behavior requried by the ISA for NAPOT mappings.
* A fix for a missing TLB flush on intermediate mapping changes.
* A fix for a build warning about a missing declaration of
overflow_stack.
* A fix for a performace regression related to incorrect tracking of
completed batch TLB flushes.
-----BEGIN PGP SIGNATURE-----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=CvsK
-----END PGP SIGNATURE-----
Merge tag 'riscv-for-linus-6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- fix missing TLB flush during early boot on SPARSEMEM_VMEMMAP
configurations
- fixes to correctly implement the break-before-make behavior requried
by the ISA for NAPOT mappings
- fix a missing TLB flush on intermediate mapping changes
- fix build warning about a missing declaration of overflow_stack
- fix performace regression related to incorrect tracking of completed
batch TLB flushes
* tag 'riscv-for-linus-6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: Fix arch_tlbbatch_flush() by clearing the batch cpumask
riscv: declare overflow_stack as exported from traps.c
riscv: Fix arch_hugetlb_migration_supported() for NAPOT
riscv: Flush the tlb when a page directory is freed
riscv: Fix hugetlb_mask_last_page() when NAPOT is enabled
riscv: Fix set_huge_pte_at() for NAPOT mapping
riscv: mm: execute local TLB flush after populating vmemmap
- Fix broken direct trampolines being called when another callback is
attached the same function. ARM 64 does not support FTRACE_WITH_REGS, and
when it added direct trampoline calls from ftrace, it removed the
"WITH_REGS" flag from the ftrace_ops for direct trampolines. This broke
x86 as x86 requires direct trampolines to have WITH_REGS. This wasn't
noticed because direct trampolines work as long as the function it is
attached to is not shared with other callbacks (like the function tracer).
When there's other callbacks, a helper trampoline is called, to call all
the non direct callbacks and when it returns, the direct trampoline is
called. For x86, the direct trampoline sets a flag in the regs field to
tell the x86 specific code to call the direct trampoline. But this only
works if the ftrace_ops had WITH_REGS set. ARM does things differently
that does not require this. For now, set WITH_REGS if the arch supports
WITH_REGS (which ARM does not), and this makes it work for both ARM64 and
x86.
- Fix wasted memory in the saved_cmdlines logic.
The saved_cmdlines is a cache that maps PIDs to COMMs that tracing can
use. Most trace events only save the PID in the event. The saved_cmdlines
file lists PIDs to COMMs so that the tracing tools can show an actual name
and not just a PID for each event. There's an array of PIDs that map to a
small set of saved COMM strings. The array is set to PID_MAX_DEFAULT which
is usually set to 32768. When a PID comes in, it will add itself to this
array along with the index into the COMM array (note if the system allows
more than PID_MAX_DEFAULT, this cache is similar to cache lines as an
update of a PID that has the same PID_MAX_DEFAULT bits set will flush out
another task with the same matching bits set).
A while ago, the size of this cache was changed to be dynamic and the
array was moved into a structure and created with kmalloc(). But this
new structure had the size of 131104 bytes, or 0x20020 in hex. As kmalloc
allocates in powers of two, it was actually allocating 0x40000 bytes
(262144) leaving 131040 bytes of wasted memory. The last element of this
structure was a pointer to the COMM string array which defaulted to just
saving 128 COMMs.
By changing the last field of this structure to a variable length string,
and just having it round up to fill the allocated memory, the default
size of the saved COMM cache is now 8190. This not only uses the wasted
space, but actually saves space by removing the extra allocation for the
COMM names.
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCZcYi8RQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qqENAQD6xGE9EPkbHArElKfgpSuQOfGhcyyP
LjgVhqVgmIoqUwD8CeVpxk3VwZIOQYvPn5XictcZgkYSeEWUZcKYg4c/3gs=
=iIBv
-----END PGP SIGNATURE-----
Merge tag 'trace-v6.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing fixes from Steven Rostedt:
- Fix broken direct trampolines being called when another callback is
attached the same function.
ARM 64 does not support FTRACE_WITH_REGS, and when it added direct
trampoline calls from ftrace, it removed the "WITH_REGS" flag from
the ftrace_ops for direct trampolines. This broke x86 as x86 requires
direct trampolines to have WITH_REGS.
This wasn't noticed because direct trampolines work as long as the
function it is attached to is not shared with other callbacks (like
the function tracer). When there are other callbacks, a helper
trampoline is called, to call all the non direct callbacks and when
it returns, the direct trampoline is called.
For x86, the direct trampoline sets a flag in the regs field to tell
the x86 specific code to call the direct trampoline. But this only
works if the ftrace_ops had WITH_REGS set. ARM does things
differently that does not require this. For now, set WITH_REGS if the
arch supports WITH_REGS (which ARM does not), and this makes it work
for both ARM64 and x86.
- Fix wasted memory in the saved_cmdlines logic.
The saved_cmdlines is a cache that maps PIDs to COMMs that tracing
can use. Most trace events only save the PID in the event. The
saved_cmdlines file lists PIDs to COMMs so that the tracing tools can
show an actual name and not just a PID for each event. There's an
array of PIDs that map to a small set of saved COMM strings. The
array is set to PID_MAX_DEFAULT which is usually set to 32768. When a
PID comes in, it will add itself to this array along with the index
into the COMM array (note if the system allows more than
PID_MAX_DEFAULT, this cache is similar to cache lines as an update of
a PID that has the same PID_MAX_DEFAULT bits set will flush out
another task with the same matching bits set).
A while ago, the size of this cache was changed to be dynamic and the
array was moved into a structure and created with kmalloc(). But this
new structure had the size of 131104 bytes, or 0x20020 in hex. As
kmalloc allocates in powers of two, it was actually allocating
0x40000 bytes (262144) leaving 131040 bytes of wasted memory. The
last element of this structure was a pointer to the COMM string array
which defaulted to just saving 128 COMMs.
By changing the last field of this structure to a variable length
string, and just having it round up to fill the allocated memory, the
default size of the saved COMM cache is now 8190. This not only uses
the wasted space, but actually saves space by removing the extra
allocation for the COMM names.
* tag 'trace-v6.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing: Fix wasted memory in saved_cmdlines logic
ftrace: Fix DIRECT_CALLS to use SAVE_REGS by default
- kprobes: Remove unnecessary initial values of local variables.
- tracing/probe-events: Fixing parser bugs.
. Fix to calculate the argument size and format string after setting
type information from BTF, because BTF can change the size and format
string.
. Fix to show $comm parse error correctly instead of failing silently.
-----BEGIN PGP SIGNATURE-----
iQFPBAABCgA5FiEEh7BulGwFlgAOi5DV2/sHvwUrPxsFAmXGBlUbHG1hc2FtaS5o
aXJhbWF0c3VAZ21haWwuY29tAAoJENv7B78FKz8br98H/iP/rcGjP9WlnnYmUTXg
GFckr381X3PwyHKgcYyyzKlbNtl3PS4rruSXJnR3loIys7zPN4kJII8vnn4bnHex
djUv/5hoznKhEN/jItojm7Fip9gCdhQ9TDNPOXVcrBzwMyYVUBBlqaL+lY9isPnF
JGOWHa0FhM2mT6IsXW9Rg7cqECB0n6wB6wfrcv/KBFNr2KDll9Kbg7SOrYl6KvyV
kTRoV3MY3M9U4fRn3N6mZw6YU8i7q+cShVMs7mNaaz9cc09Q6mYcaa9H4l9ecz6p
woetR68yrYq+8A95byYh3vF7ChL4/BJKvTgsrXKEuraxkpDujYVOT7AKLAeNuBIk
Hcs=
=htgp
-----END PGP SIGNATURE-----
Merge tag 'probes-fixes-v6.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes fixes from Masami Hiramatsu:
- remove unnecessary initial values of kprobes local variables
- probe-events parser bug fixes:
- calculate the argument size and format string after setting type
information from BTF, because BTF can change the size and format
string.
- show $comm parse error correctly instead of failing silently.
* tag 'probes-fixes-v6.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
kprobes: Remove unnecessary initial values of variables
tracing/probes: Fix to set arg size and fmt after setting type from BTF
tracing/probes: Fix to show a parse error for bad type for $comm
- Tighten ELF relocation checks on the RISC-V EFI stub
- Give up if the new EFI memory attributes protocol fails spuriously on
x86
- Take care not to place the kernel in the lowest 16 MB of DRAM on x86
- Omit special purpose EFI memory from memblock
- Some fixes for the CXL CPER reporting code
- Make the PE/COFF layout of mixed-mode capable images comply with a
strict interpretation of the spec
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQQQm/3uucuRGn1Dmh0wbglWLn0tXAUCZcDtKAAKCRAwbglWLn0t
XMDfAP9ttq8Ir4+hp8A0DGE79x6eSgBIkl5ztGmMQGybzEkzdAEAgxfDUieQW4TT
GmbyGGUouvSYxfZf4gVTQn8b/bd57AI=
=Af8A
-----END PGP SIGNATURE-----
Merge tag 'efi-fixes-for-v6.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI fixes from Ard Biesheuvel:
"The only notable change here is the patch that changes the way we deal
with spurious errors from the EFI memory attribute protocol. This will
be backported to v6.6, and is intended to ensure that we will not
paint ourselves into a corner when we tighten this further in order to
comply with MS requirements on signed EFI code.
Note that this protocol does not currently exist in x86 production
systems in the field, only in Microsoft's fork of OVMF, but it will be
mandatory for Windows logo certification for x86 PCs in the future.
- Tighten ELF relocation checks on the RISC-V EFI stub
- Give up if the new EFI memory attributes protocol fails spuriously
on x86
- Take care not to place the kernel in the lowest 16 MB of DRAM on
x86
- Omit special purpose EFI memory from memblock
- Some fixes for the CXL CPER reporting code
- Make the PE/COFF layout of mixed-mode capable images comply with a
strict interpretation of the spec"
* tag 'efi-fixes-for-v6.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
x86/efistub: Use 1:1 file:memory mapping for PE/COFF .compat section
cxl/trace: Remove unnecessary memcpy's
cxl/cper: Fix errant CPER prints for CXL events
efi: Don't add memblocks for soft-reserved memory
efi: runtime: Fix potential overflow of soft-reserved region size
efi/libstub: Add one kernel-doc comment
x86/efistub: Avoid placing the kernel below LOAD_PHYSICAL_ADDR
x86/efistub: Give up if memory attribute protocol returns an error
riscv/efistub: Tighten ELF relocation check
riscv/efistub: Ensure GP-relative addressing is not used
-----BEGIN PGP SIGNATURE-----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=jJks
-----END PGP SIGNATURE-----
Merge tag 'pci-v6.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull pci fixes from Bjorn Helgaas:
- Fix an unintentional truncation of DWC MSI-X address to 32 bits and
update similar MSI code to match (Dan Carpenter)
* tag 'pci-v6.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
PCI: dwc: Clean up dw_pcie_ep_raise_msi_irq() alignment
PCI: dwc: Fix a 64bit bug in dw_pcie_ep_raise_msix_irq()
- Move the unused cleanup to a _sync initcall
Providers:
- mediatek: Fix race conditions at probe/remove with genpd
- renesas: r8a77980-sysc: CR7 must be always on
-----BEGIN PGP SIGNATURE-----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=1Krz
-----END PGP SIGNATURE-----
Merge tag 'pmdomain-v6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm
Pull pmdomain fixes from Ulf Hansson:
"Core:
- Move the unused cleanup to a _sync initcall
Providers:
- mediatek: Fix race conditions at probe/remove with genpd
- renesas: r8a77980-sysc: CR7 must be always on"
* tag 'pmdomain-v6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm:
pmdomain: mediatek: fix race conditions with genpd
pmdomain: renesas: r8a77980-sysc: CR7 must be always on
pmdomain: core: Move the unused cleanup to a _sync initcall
- remove the new GPIO device from the global list unconditionally in
error path in core GPIOLIB
-----BEGIN PGP SIGNATURE-----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=yXCE
-----END PGP SIGNATURE-----
Merge tag 'gpio-fixes-for-v6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fix from Bartosz Golaszewski:
- remove the new GPIO device from the global list unconditionally in
error path in core GPIOLIB
* tag 'gpio-fixes-for-v6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpio: remove GPIO device from the list unconditionally in error path
i915:
- gvt: docs fix, uninit var, MAINTAINERS
ivpu:
- add aborted job status
- disable d3 hot delay
- mmu fixes
nouveau:
- fix gsp rpc size request
- fix dma buffer leaks
- use common code for gsp mem ctor
xe:
- Fix a loop in an error path
- Fix a missing dma-fence reference
- Fix a retry path on userptr REMAP
- Workaround for a false gcc warning
- Fix missing map of the usm batch buffer
in the migrate vm.
- Fix a memory leak.
- Fix a bad assumption of used page size
- Fix hitting a BUG() due to zero pages to map.
- Remove some leftover async bind queue relics
amdgpu:
- Misc NULL/bounds check fixes
- ODM pipe policy fix
- Aborted suspend fixes
- JPEG 4.0.5 fix
- DCN 3.5 fixes
- PSP fix
- DP MST fix
- Phantom pipe fix
- VRAM vendor fix
- Clang fix
- SR-IOV fix
msm:
- DPU:
- fix for kernel doc warnings and smatch warnings in dpu_encoder
- fix for smatch warning in dpu_encoder
- fix the bus bandwidth value for SDM670
- DP:
- fixes to handle unknown bpc case correctly for DP
- fix for MISC0 programming
- GPU:
- dmabuf vmap fix
- a610 UBWC corruption fix (incorrect hbb)
- revert a commit that was making GPU recovery unreliable
-----BEGIN PGP SIGNATURE-----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=L7Vc
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-2024-02-09' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Regular weekly fixes, xe, amdgpu and msm are most of them, with some
misc in i915, ivpu and nouveau, scattered but nothing too intense at
this point.
i915:
- gvt: docs fix, uninit var, MAINTAINERS
ivpu:
- add aborted job status
- disable d3 hot delay
- mmu fixes
nouveau:
- fix gsp rpc size request
- fix dma buffer leaks
- use common code for gsp mem ctor
xe:
- Fix a loop in an error path
- Fix a missing dma-fence reference
- Fix a retry path on userptr REMAP
- Workaround for a false gcc warning
- Fix missing map of the usm batch buffer in the migrate vm.
- Fix a memory leak.
- Fix a bad assumption of used page size
- Fix hitting a BUG() due to zero pages to map.
- Remove some leftover async bind queue relics
amdgpu:
- Misc NULL/bounds check fixes
- ODM pipe policy fix
- Aborted suspend fixes
- JPEG 4.0.5 fix
- DCN 3.5 fixes
- PSP fix
- DP MST fix
- Phantom pipe fix
- VRAM vendor fix
- Clang fix
- SR-IOV fix
msm:
- DPU:
- fix for kernel doc warnings and smatch warnings in dpu_encoder
- fix for smatch warning in dpu_encoder
- fix the bus bandwidth value for SDM670
- DP:
- fixes to handle unknown bpc case correctly for DP
- fix for MISC0 programming
- GPU:
- dmabuf vmap fix
- a610 UBWC corruption fix (incorrect hbb)
- revert a commit that was making GPU recovery unreliable"
* tag 'drm-fixes-2024-02-09' of git://anongit.freedesktop.org/drm/drm: (43 commits)
drm/xe: Remove TEST_VM_ASYNC_OPS_ERROR
drm/xe/vm: don't ignore error when in_kthread
drm/xe: Assume large page size if VMA not yet bound
drm/xe/display: Fix memleak in display initialization
drm/xe: Map both mem.kernel_bb_pool and usm.bb_pool
drm/xe: circumvent bogus stringop-overflow warning
drm/xe: Pick correct userptr VMA to repin on REMAP op failure
drm/xe: Take a reference in xe_exec_queue_last_fence_get()
drm/xe: Fix loop in vm_bind_ioctl_ops_unwind
drm/amdgpu: Fix HDP flush for VFs on nbio v7.9
drm/amd/display: Implement bounds check for stream encoder creation in DCN301
drm/amd/display: Increase frame-larger-than for all display_mode_vba files
drm/amd/display: Clear phantom stream count and plane count
drm/amdgpu: Avoid fetching VRAM vendor info
drm/amd/display: Disable ODM by default for DCN35
drm/amd/display: Update phantom pipe enable / disable sequence
drm/amd/display: Fix MST Null Ptr for RV
drm/amdgpu: Fix shared buff copy to user
drm/amd/display: Increase eval/entry delay for DCN35
drm/amdgpu: remove asymmetrical irq disabling in jpeg 4.0.5 suspend
...
The kernel built with MCRUSOE is unbootable on Transmeta Crusoe. It shows
the following error message:
This kernel requires an i686 CPU, but only detected an i586 CPU.
Unable to boot - please use a kernel appropriate for your CPU.
Remove MCRUSOE from the condition introduced in commit in Fixes, effectively
changing X86_MINIMUM_CPU_FAMILY back to 5 on that machine, which matches the
CPU family given by CPUID.
[ bp: Massage commit message. ]
Fixes: 25d76ac888 ("x86/Kconfig: Explicitly enumerate i686-class CPUs in Kconfig")
Signed-off-by: Aleksander Mazur <deweloper@wp.pl>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/20240123134309.1117782-1-deweloper@wp.pl
While looking at improving the saved_cmdlines cache I found a huge amount
of wasted memory that should be used for the cmdlines.
The tracing data saves pids during the trace. At sched switch, if a trace
occurred, it will save the comm of the task that did the trace. This is
saved in a "cache" that maps pids to comms and exposed to user space via
the /sys/kernel/tracing/saved_cmdlines file. Currently it only caches by
default 128 comms.
The structure that uses this creates an array to store the pids using
PID_MAX_DEFAULT (which is usually set to 32768). This causes the structure
to be of the size of 131104 bytes on 64 bit machines.
In hex: 131104 = 0x20020, and since the kernel allocates generic memory in
powers of two, the kernel would allocate 0x40000 or 262144 bytes to store
this structure. That leaves 131040 bytes of wasted space.
Worse, the structure points to an allocated array to store the comm names,
which is 16 bytes times the amount of names to save (currently 128), which
is 2048 bytes. Instead of allocating a separate array, make the structure
end with a variable length string and use the extra space for that.
This is similar to a recommendation that Linus had made about eventfs_inode names:
https://lore.kernel.org/all/20240130190355.11486-5-torvalds@linux-foundation.org/
Instead of allocating a separate string array to hold the saved comms,
have the structure end with: char saved_cmdlines[]; and round up to the
next power of two over sizeof(struct saved_cmdline_buffers) + num_cmdlines * TASK_COMM_LEN
It will use this extra space for the saved_cmdline portion.
Now, instead of saving only 128 comms by default, by using this wasted
space at the end of the structure it can save over 8000 comms and even
saves space by removing the need for allocating the other array.
Link: https://lore.kernel.org/linux-trace-kernel/20240209063622.1f7b6d5f@rorschach.local.home
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Vincent Donnefort <vdonnefort@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Mete Durlu <meted@linux.ibm.com>
Fixes: 939c7a4f04 ("tracing: Introduce saved_cmdlines_size file")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
The commit 60c8971899 ("ftrace: Make DIRECT_CALLS work WITH_ARGS
and !WITH_REGS") changed DIRECT_CALLS to use SAVE_ARGS when there
are multiple ftrace_ops at the same function, but since the x86 only
support to jump to direct_call from ftrace_regs_caller, when we set
the function tracer on the same target function on x86, ftrace-direct
does not work as below (this actually works on arm64.)
At first, insmod ftrace-direct.ko to put a direct_call on
'wake_up_process()'.
# insmod kernel/samples/ftrace/ftrace-direct.ko
# less trace
...
<idle>-0 [006] ..s1. 564.686958: my_direct_func: waking up rcu_preempt-17
<idle>-0 [007] ..s1. 564.687836: my_direct_func: waking up kcompactd0-63
<idle>-0 [006] ..s1. 564.690926: my_direct_func: waking up rcu_preempt-17
<idle>-0 [006] ..s1. 564.696872: my_direct_func: waking up rcu_preempt-17
<idle>-0 [007] ..s1. 565.191982: my_direct_func: waking up kcompactd0-63
Setup a function filter to the 'wake_up_process' too, and enable it.
# cd /sys/kernel/tracing/
# echo wake_up_process > set_ftrace_filter
# echo function > current_tracer
# less trace
...
<idle>-0 [006] ..s3. 686.180972: wake_up_process <-call_timer_fn
<idle>-0 [006] ..s3. 686.186919: wake_up_process <-call_timer_fn
<idle>-0 [002] ..s3. 686.264049: wake_up_process <-call_timer_fn
<idle>-0 [002] d.h6. 686.515216: wake_up_process <-kick_pool
<idle>-0 [002] d.h6. 686.691386: wake_up_process <-kick_pool
Then, only function tracer is shown on x86.
But if you enable 'kprobe on ftrace' event (which uses SAVE_REGS flag)
on the same function, it is shown again.
# echo 'p wake_up_process' >> dynamic_events
# echo 1 > events/kprobes/p_wake_up_process_0/enable
# echo > trace
# less trace
...
<idle>-0 [006] ..s2. 2710.345919: p_wake_up_process_0: (wake_up_process+0x4/0x20)
<idle>-0 [006] ..s3. 2710.345923: wake_up_process <-call_timer_fn
<idle>-0 [006] ..s1. 2710.345928: my_direct_func: waking up rcu_preempt-17
<idle>-0 [006] ..s2. 2710.349931: p_wake_up_process_0: (wake_up_process+0x4/0x20)
<idle>-0 [006] ..s3. 2710.349934: wake_up_process <-call_timer_fn
<idle>-0 [006] ..s1. 2710.349937: my_direct_func: waking up rcu_preempt-17
To fix this issue, use SAVE_REGS flag for multiple ftrace_ops flag of
direct_call by default.
Link: https://lore.kernel.org/linux-trace-kernel/170484558617.178953.1590516949390270842.stgit@devnote2
Fixes: 60c8971899 ("ftrace: Make DIRECT_CALLS work WITH_ARGS and !WITH_REGS")
Cc: stable@vger.kernel.org
Cc: Florent Revest <revest@chromium.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64]
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
__le32 and __le64 types should be used with le32_to_cpu() and
le64_to_cpu() and __user is needed for pointers referencing
guest memory, as sparse helpfully points out.
Fixes: e9f12b5fff ("RISC-V: KVM: Implement SBI STA extension")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202401020142.lwFEDK5v-lkp@intel.com/
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
__le32 and __le64 types should be used with le32_to_cpu() and
le64_to_cpu(), as sparse helpfully points out.
Fixes: fdf68acccf ("RISC-V: paravirt: Implement steal-time support")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202401011933.hL9zqmKo-lkp@intel.com/
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
steal_time is not used outside paravirt.c, make it static,
as sparse suggested.
Fixes: fdf68acccf ("RISC-V: paravirt: Implement steal-time support")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Fixes for v6.8-rc4
DPU:
- fix for kernel doc warnings and smatch warnings in dpu_encoder
- fix for smatch warning in dpu_encoder
- fix the bus bandwidth value for SDM670
DP:
- fixes to handle unknown bpc case correctly for DP. The current code was
spilling over into other bits of DP configuration register, had to be
fixed to avoid the extra shifts which were causing the spill over
- fix for MISC0 programming in DP driver to program the correct
colorimetry value
GPU:
- dmabuf vmap fix
- a610 UBWC corruption fix (incorrect hbb)
- revert a commit that was making GPU recovery unreliable
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGv+tb1+_cp7ftxcMZbbxE9810rvxeaC50eL=msQ+zkm0g@mail.gmail.com
- Fix a loop in an error path
- Fix a missing dma-fence reference
- Fix a retry path on userptr REMAP
- Workaround for a false gcc warning
- Fix missing map of the usm batch buffer
in the migrate vm.
- Fix a memory leak.
- Fix a bad assumption of used page size
- Fix hitting a BUG() due to zero pages to map.
- Remove some leftover async bind queue relics
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRskUM7w1oG5rx2IZO4FpNVCsYGvwUCZcS1UgAKCRC4FpNVCsYG
v8wMAQCfZF54SM76+feBVRzwXxhjAhqe2q9v/hZMHJOsF8Be7AD+PKhCfitzxKgJ
m+K9kGwyI2Kv0VEQjIVPkucKEHA0FQc=
=YJd2
-----END PGP SIGNATURE-----
Merge tag 'drm-xe-fixes-2024-02-08' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes
Driver Changes:
- Fix a loop in an error path
- Fix a missing dma-fence reference
- Fix a retry path on userptr REMAP
- Workaround for a false gcc warning
- Fix missing map of the usm batch buffer
in the migrate vm.
- Fix a memory leak.
- Fix a bad assumption of used page size
- Fix hitting a BUG() due to zero pages to map.
- Remove some leftover async bind queue relics
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZcS2LllawGifubsk@fedora
several fixes for nouveau around register size, DMA buffer leaks and API
consistency, a multiple fixes for ivpu around MMU setup, initialization
and firmware interactions.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCZcTCuAAKCRDj7w1vZxhR
xTI/AP4wnENmQLfNjGGAZNoAPgbonxSCsy2lNLDPj2LKCckpLgEApf0b8UCpbWGd
3obSP91CD/WzyT6v+txDhXmG7STU3g0=
=R6LM
-----END PGP SIGNATURE-----
Merge tag 'drm-misc-fixes-2024-02-08' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
A null pointer dereference fix for v3d, a TTM pool initialization fix,
several fixes for nouveau around register size, DMA buffer leaks and API
consistency, a multiple fixes for ivpu around MMU setup, initialization
and firmware interactions.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4wsi2i6kgkqdu7nzp4g7hxasbswnrmc5cakgf5zzvnix53u7lr@4rmp7hwblow3
Current release - regressions:
- nic: intel: fix old compiler regressions
- netfilter: ipset: missing gc cancellations fixed
Current release - new code bugs:
- netfilter: ctnetlink: fix filtering for zone 0
Previous releases - regressions:
- core: fix from address in memcpy_to_iter_csum()
- netfilter: nfnetlink_queue: un-break NF_REPEAT
- af_unix: fix memory leak for dead unix_(sk)->oob_skb in GC.
- devlink: avoid potential loop in devlink_rel_nested_in_notify_work()
- iwlwifi:
- mvm: fix a battery life regression
- fix double-free bug
- mac80211: fix waiting for beacons logic
- nic: nfp: flower: prevent re-adding mac index for bonded port
Previous releases - always broken:
- rxrpc: fix generation of serial numbers to skip zero
- tipc: check the bearer type before calling tipc_udp_nl_bearer_add()
- tunnels: fix out of bounds access when building IPv6 PMTU error
- nic: hv_netvsc: register VF in netvsc_probe if NET_DEVICE_REGISTER missed
- nic: atlantic: fix DMA mapping for PTP hwts ring
Misc:
- selftests: more fixes to deal with very slow hosts
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
-----BEGIN PGP SIGNATURE-----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=ihj+
-----END PGP SIGNATURE-----
Merge tag 'net-6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Paolo Abeni:
"Including fixes from WiFi and netfilter.
Current release - regressions:
- nic: intel: fix old compiler regressions
- netfilter: ipset: missing gc cancellations fixed
Current release - new code bugs:
- netfilter: ctnetlink: fix filtering for zone 0
Previous releases - regressions:
- core: fix from address in memcpy_to_iter_csum()
- netfilter: nfnetlink_queue: un-break NF_REPEAT
- af_unix: fix memory leak for dead unix_(sk)->oob_skb in GC.
- devlink: avoid potential loop in devlink_rel_nested_in_notify_work()
- iwlwifi:
- mvm: fix a battery life regression
- fix double-free bug
- mac80211: fix waiting for beacons logic
- nic: nfp: flower: prevent re-adding mac index for bonded port
Previous releases - always broken:
- rxrpc: fix generation of serial numbers to skip zero
- tipc: check the bearer type before calling tipc_udp_nl_bearer_add()
- tunnels: fix out of bounds access when building IPv6 PMTU error
- nic: hv_netvsc: register VF in netvsc_probe if NET_DEVICE_REGISTER
missed
- nic: atlantic: fix DMA mapping for PTP hwts ring
Misc:
- selftests: more fixes to deal with very slow hosts"
* tag 'net-6.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (80 commits)
netfilter: nft_set_pipapo: remove scratch_aligned pointer
netfilter: nft_set_pipapo: add helper to release pcpu scratch area
netfilter: nft_set_pipapo: store index in scratch maps
netfilter: nft_set_rbtree: skip end interval element from gc
netfilter: nfnetlink_queue: un-break NF_REPEAT
netfilter: nf_tables: use timestamp to check for set element timeout
netfilter: nft_ct: reject direction for ct id
netfilter: ctnetlink: fix filtering for zone 0
s390/qeth: Fix potential loss of L3-IP@ in case of network issues
netfilter: ipset: Missing gc cancellations fixed
octeontx2-af: Initialize maps.
net: ethernet: ti: cpsw: enable mac_managed_pm to fix mdio
net: ethernet: ti: cpsw_new: enable mac_managed_pm to fix mdio
netfilter: nft_set_pipapo: remove static in nft_pipapo_get()
netfilter: nft_compat: restrict match/target protocol to u16
netfilter: nft_compat: reject unused compat flag
netfilter: nft_compat: narrow down revision to unsigned 8-bits
net: intel: fix old compiler regressions
MAINTAINERS: Maintainer change for rds
selftests: cmsg_ipv6: repeat the exact packet
...
laptops, the pinctrl/GPIO driver won't probe on some systems.
-----BEGIN PGP SIGNATURE-----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=iBHl
-----END PGP SIGNATURE-----
Merge tag 'pinctrl-v6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fix from Linus Walleij:
"A single fix for the AMD driver which affects developer laptops, the
pinctrl/GPIO driver won't probe on some systems"
* tag 'pinctrl-v6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: amd: Add IRQF_ONESHOT to the interrupt request
- Update a potentially stale firmware attribute (Maurizio)
- Fixes for the recent verbose error logging (Keith, Chaitanya)
- Protection information payload size fix for passthrough (Francis)
-----BEGIN PGP SIGNATURE-----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=uQIH
-----END PGP SIGNATURE-----
Merge tag 'nvme-6.8-2023-02-08' of git://git.infradead.org/nvme into block-6.8
Pull NVMe fixes from Keith:
"nvme fixes for Linux 6.8
- Update a potentially stale firmware attribute (Maurizio)
- Fixes for the recent verbose error logging (Keith, Chaitanya)
- Protection information payload size fix for passthrough (Francis)"
* tag 'nvme-6.8-2023-02-08' of git://git.infradead.org/nvme:
nvme: use ns->head->pi_size instead of t10_pi_tuple structure size
nvme-core: fix comment to reflect right functions
nvme: move passthrough logging attribute to head
nvme-host: fix the updating of the firmware version
Ensure no remaining requests in virtqueues before resetting vdev and
deleting virtqueues. Otherwise these requests will never be completed.
It may cause the system to become unresponsive.
Function blk_mq_quiesce_queue() can ensure that requests have become
in_flight status, but it cannot guarantee that requests have been
processed by the device. Virtqueues should never be deleted before
all requests become complete status.
Function blk_mq_freeze_queue() ensure that all requests in virtqueues
become complete status. And no requests can enter in virtqueues.
Signed-off-by: Yi Sun <yi.sun@unisoc.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Link: https://lore.kernel.org/r/20240129085250.1550594-1-yi.sun@unisoc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
