Pull cgroup changes from Tejun Heo:
"The only notable change is Vipin's new misc cgroup controller.
This implements generic support for resources which can be controlled
by simply counting and limiting the number of resource instances - ie
there's X number of these on the system and this cgroup subtree can
have upto Y of those.
The first user is the address space IDs used for virtual machine
memory encryption and expected future usages are similar - niche
hardware features with concrete resource limits and simple usage
models"
* 'for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: use tsk->in_iowait instead of delayacct_is_task_waiting_on_io()
cgroup/cpuset: fix typos in comments
cgroup: misc: mark dummy misc_cg_res_total_usage() static inline
svm/sev: Register SEV and SEV-ES ASIDs to the misc controller
cgroup: Miscellaneous cgroup documentation.
cgroup: Add misc cgroup controller
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Merge tag 'livepatching-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching
Pull livepatching update from Petr Mladek:
- Use TIF_NOTIFY_SIGNAL infrastructure instead of the fake signal
* tag 'livepatching-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
livepatch: Replace the fake signal sending with TIF_NOTIFY_SIGNAL infrastructure
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Merge tag 'printk-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- Stop synchronizing kernel log buffer readers by logbuf_lock. As a
result, the access to the buffer is fully lockless now.
Note that printk() itself still uses locks because it tries to flush
the messages to the console immediately. Also the per-CPU temporary
buffers are still there because they prevent infinite recursion and
serialize backtraces from NMI. All this is going to change in the
future.
- kmsg_dump API rework and cleanup as a side effect of the logbuf_lock
removal.
- Make bstr_printf() aware that %pf and %pF formats could deference the
given pointer.
- Show also page flags by %pGp format.
- Clarify the documentation for plain pointer printing.
- Do not show no_hash_pointers warning multiple times.
- Update Senozhatsky email address.
- Some clean up.
* tag 'printk-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: (24 commits)
lib/vsprintf.c: remove leftover 'f' and 'F' cases from bstr_printf()
printk: clarify the documentation for plain pointer printing
kernel/printk.c: Fixed mundane typos
printk: rename vprintk_func to vprintk
vsprintf: dump full information of page flags in pGp
mm, slub: don't combine pr_err with INFO
mm, slub: use pGp to print page flags
MAINTAINERS: update Senozhatsky email address
lib/vsprintf: do not show no_hash_pointers message multiple times
printk: console: remove unnecessary safe buffer usage
printk: kmsg_dump: remove _nolock() variants
printk: remove logbuf_lock
printk: introduce a kmsg_dump iterator
printk: kmsg_dumper: remove @active field
printk: add syslog_lock
printk: use atomic64_t for devkmsg_user.seq
printk: use seqcount_latch for clear_seq
printk: introduce CONSOLE_LOG_MAX
printk: consolidate kmsg_dump_get_buffer/syslog_print_all code
printk: refactor kmsg_dump_get_buffer()
...
Exclusively tidy ups this cycle. Most of them are thanks to Sumit Garg
and, as it happens, the clean ups do result in a slight increase in
the line count. This is due to registering kdb commands using data
structures rather than function calls which, in turn, simplifies the
memory management during command registration.
In addition to changes to command registration we also have some dead
code removal, a clearer implementation of environment variable handling
and a typo fix.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
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Merge tag 'kgdb-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux
Pull kgdb updates from Daniel Thompson:
"Exclusively tidy ups this cycle. Most of them are thanks to Sumit Garg
and, as it happens, the clean ups do result in a slight increase in
the line count. This is due to registering kdb commands using data
structures rather than function calls which, in turn, simplifies the
memory management during command registration.
In addition to changes to command registration we also have some dead
code removal, a clearer implementation of environment variable
handling and a typo fix"
* tag 'kgdb-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
kdb: Refactor env variables get/set code
kernel: debug: Ordinary typo fixes in the file gdbstub.c
kdb: Simplify kdb commands registration
kdb: Remove redundant function definitions/prototypes
- fix buffer size for in-kernel disassembler for ebpf programs.
- fix two memory leaks in zcrypt driver.
- expose PCI device UID as index, including an indicator if the uid is
unique.
- remove some oprofile leftovers.
- improve stack unwinder tests.
- don't use gcc atomic builtins anymore, just like all other
architectures. Even though I'm sure the current code is ok, I
totally dislike that s390 is the only architecture being special
here; especially considering that there was a lengthly discussion
about this topic and the outcome was not to use the builtins.
Therefore open-code atomic ops again with inline assembly and switch
to gcc builtins as soon as other architectures are doing.
- couple of other changes to atomic and cmpxchg, and use
atomic-instrumented.h for KASAN.
- separate zbus creation, registration, and scanning in our PCI code
which allows for cleaner and easier handling.
- a rather large change to the vfio-ap code to fix circular locking
dependencies when updating crypto masks.
- move QAOB handling from qdio layer down to drivers.
- add CRW inject facility to common I/O layer. This adds debugs files
which allow to generate artificial events from user space for
testing purposes.
- increase SCLP console line length from 80 to 320 characters to avoid
odd wrapped lines.
- add protected virtualization guest and host indication files, which
indicate either that a guest is running in pv mode or if the
hypervisor is capable of starting pv guests.
- various other small fixes and improvements all over the place.
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Merge tag 's390-5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- fix buffer size for in-kernel disassembler for ebpf programs.
- fix two memory leaks in zcrypt driver.
- expose PCI device UID as index, including an indicator if the uid is
unique.
- remove some oprofile leftovers.
- improve stack unwinder tests.
- don't use gcc atomic builtins anymore, just like all other
architectures. Even though I'm sure the current code is ok, I totally
dislike that s390 is the only architecture being special here;
especially considering that there was a lengthly discussion about
this topic and the outcome was not to use the builtins. Therefore
open-code atomic ops again with inline assembly and switch to gcc
builtins as soon as other architectures are doing.
- couple of other changes to atomic and cmpxchg, and use
atomic-instrumented.h for KASAN.
- separate zbus creation, registration, and scanning in our PCI code
which allows for cleaner and easier handling.
- a rather large change to the vfio-ap code to fix circular locking
dependencies when updating crypto masks.
- move QAOB handling from qdio layer down to drivers.
- add CRW inject facility to common I/O layer. This adds debugs files
which allow to generate artificial events from user space for testing
purposes.
- increase SCLP console line length from 80 to 320 characters to avoid
odd wrapped lines.
- add protected virtualization guest and host indication files, which
indicate either that a guest is running in pv mode or if the
hypervisor is capable of starting pv guests.
- various other small fixes and improvements all over the place.
* tag 's390-5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (53 commits)
s390/disassembler: increase ebpf disasm buffer size
s390/archrandom: add parameter check for s390_arch_random_generate
s390/zcrypt: fix zcard and zqueue hot-unplug memleak
s390/pci: expose a PCI device's UID as its index
s390/atomic,cmpxchg: always inline __xchg/__cmpxchg
s390/smp: fix do_restart() prototype
s390: get rid of oprofile leftovers
s390/atomic,cmpxchg: make constraints work with old compilers
s390/test_unwind: print test suite start/end info
s390/cmpxchg: use unsigned long values instead of void pointers
s390/test_unwind: add WARN if tests failed
s390/test_unwind: unify error handling paths
s390: update defconfigs
s390/spinlock: use R constraint in inline assembly
s390/atomic,cmpxchg: switch to use atomic-instrumented.h
s390/cmpxchg: get rid of gcc atomic builtins
s390/atomic: get rid of gcc atomic builtins
s390/atomic: use proper constraints
s390/atomic: move remaining inline assemblies to atomic_ops.h
s390/bitops: make bitops only work on longs
...
gets rid of the LAZY_GS stuff and a lot of code.
- Add an insn_decode() API which all users of the instruction decoder
should preferrably use. Its goal is to keep the details of the
instruction decoder away from its users and simplify and streamline how
one decodes insns in the kernel. Convert its users to it.
- kprobes improvements and fixes
- Set the maximum DIE per package variable on Hygon
- Rip out the dynamic NOP selection and simplify all the machinery around
selecting NOPs. Use the simplified NOPs in objtool now too.
- Add Xeon Sapphire Rapids to list of CPUs that support PPIN
- Simplify the retpolines by folding the entire thing into an
alternative now that objtool can handle alternatives with stack
ops. Then, have objtool rewrite the call to the retpoline with the
alternative which then will get patched at boot time.
- Document Intel uarch per models in intel-family.h
- Make Sub-NUMA Clustering topology the default and Cluster-on-Die the
exception on Intel.
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Merge tag 'x86_core_for_v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 updates from Borislav Petkov:
- Turn the stack canary into a normal __percpu variable on 32-bit which
gets rid of the LAZY_GS stuff and a lot of code.
- Add an insn_decode() API which all users of the instruction decoder
should preferrably use. Its goal is to keep the details of the
instruction decoder away from its users and simplify and streamline
how one decodes insns in the kernel. Convert its users to it.
- kprobes improvements and fixes
- Set the maximum DIE per package variable on Hygon
- Rip out the dynamic NOP selection and simplify all the machinery
around selecting NOPs. Use the simplified NOPs in objtool now too.
- Add Xeon Sapphire Rapids to list of CPUs that support PPIN
- Simplify the retpolines by folding the entire thing into an
alternative now that objtool can handle alternatives with stack ops.
Then, have objtool rewrite the call to the retpoline with the
alternative which then will get patched at boot time.
- Document Intel uarch per models in intel-family.h
- Make Sub-NUMA Clustering topology the default and Cluster-on-Die the
exception on Intel.
* tag 'x86_core_for_v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (53 commits)
x86, sched: Treat Intel SNC topology as default, COD as exception
x86/cpu: Comment Skylake server stepping too
x86/cpu: Resort and comment Intel models
objtool/x86: Rewrite retpoline thunk calls
objtool: Skip magical retpoline .altinstr_replacement
objtool: Cache instruction relocs
objtool: Keep track of retpoline call sites
objtool: Add elf_create_undef_symbol()
objtool: Extract elf_symbol_add()
objtool: Extract elf_strtab_concat()
objtool: Create reloc sections implicitly
objtool: Add elf_create_reloc() helper
objtool: Rework the elf_rebuild_reloc_section() logic
objtool: Fix static_call list generation
objtool: Handle per arch retpoline naming
objtool: Correctly handle retpoline thunk calls
x86/retpoline: Simplify retpolines
x86/alternatives: Optimize optimize_nops()
x86: Add insn_decode_kernel()
x86/kprobes: Move 'inline' to the beginning of the kprobe_is_ss() declaration
...
It seems like Fedora 34 ends up enabling a few new gcc warnings, notably
"-Wstringop-overread" and "-Warray-parameter".
Both of them cause what seem to be valid warnings in the kernel, where
we have array size mismatches in function arguments (that are no longer
just silently converted to a pointer to element, but actually checked).
This fixes most of the trivial ones, by making the function declaration
match the function definition, and in the case of intel_pm.c, removing
the over-specified array size from the argument declaration.
At least one 'stringop-overread' warning remains in the i915 driver, but
that one doesn't have the same obvious trivial fix, and may or may not
actually be indicative of a bug.
[ It was a mistake to upgrade one of my machines to Fedora 34 while
being busy with the merge window, but if this is the extent of the
compiler upgrade problems, things are better than usual - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Simplify Zynq Kconfig dependencies
* clk-imx:
clk: imx: Reference preceded by free
clk: imx8mq: Correct the pcie1 sels
clk: imx8mp: Remove the none exist pcie clocks
clk: imx: Fix reparenting of UARTs not associated with stdout
* clk-samsung:
clk: samsung: Remove redundant dev_err calls
clk: exynos7: Mark aclk_fsys1_200 as critical
* clk-zynq:
clk: zynqmp: pll: add set_pll_mode to check condition in zynqmp_pll_enable
clk: zynqmp: move zynqmp_pll_set_mode out of round_rate callback
clk: zynqmp: Drop dependency on ARCH_ZYNQMP
clk: zynqmp: Enable the driver if ZYNQMP_FIRMWARE is selected
* clk-rockchip:
clk: rockchip: drop MODULE_ALIAS from rk3399 clock controller
clk: rockchip: drop parenthesis from ARM || COMPILE_TEST depends
clk: rockchip: add clock controller for rk3568
clk: rockchip: support more core div setting
dt-binding: clock: Document rockchip, rk3568-cru bindings
clk: rockchip: add dt-binding header for rk3568
* clk-uniphier:
clk: uniphier: Fix potential infinite loop
- Use clk_hw pointers in socfpga driver
- Cleanup parent data in qcom clk drivers
* clk-cleanup:
clk: Drop double "if" in clk_core_determine_round_nolock() comment
clk: at91: Trivial typo fixes in the file sama7g5.c
clk: use clk_core_enable_lock() a bit more
* clk-renesas:
clk: renesas: Zero init clk_init_data
clk: renesas: Couple of spelling fixes
clk: renesas: r8a779a0: Add CMT clocks
clk: renesas: r8a7795: Add TMU clocks
clk: renesas: r8a779a0: Add TSC clock
clk: renesas: r8a779a0: Add TMU clocks
clk: renesas: r8a77965: Add DAB clock
clk: renesas: r8a77990: Add DAB clock
* clk-socfpga:
clk: socfpga: remove redundant initialization of variable div
clk: socfpga: arria10: Fix memory leak of socfpga_clk on error return
clk: socfpga: Fix code formatting
clk: socfpga: Convert to s10/agilex/n5x to use clk_hw
clk: socfpga: arria10: convert to use clk_hw
clk: socfpga: use clk_hw_register for a5/c5
* clk-allwinner:
clk: sunxi: Demote non-conformant kernel-doc headers
clk: sunxi-ng: v3s: use sigma-delta modulation for audio-pll
* clk-qcom: (45 commits)
clk: qcom: rpmh: add support for SDX55 rpmh IPA clock
clk: qcom: gcc-sdm845: get rid of the test clock
clk: qcom: convert SDM845 Global Clock Controller to parent_data
dt-bindings: clock: separate SDM845 GCC clock bindings
clk: qcom: apss-ipq-pll: Add missing MODULE_DEVICE_TABLE
clk: qcom: a53-pll: Add missing MODULE_DEVICE_TABLE
clk: qcom: a7-pll: Add missing MODULE_DEVICE_TABLE
clk: qcom: gcc-sm8350: use ARRAY_SIZE instead of specifying num_parents
clk: qcom: gcc-sm8250: use ARRAY_SIZE instead of specifying num_parents
clk: qcom: gcc-sm8150: use ARRAY_SIZE instead of specifying num_parents
clk: qcom: gcc-sc8180x: use ARRAY_SIZE instead of specifying num_parents
clk: qcom: gcc-sc7180: use ARRAY_SIZE instead of specifying num_parents
clk: qcom: videocc-sm8250: use parent_hws where possible
clk: qcom: videocc-sm8150: use parent_hws where possible
clk: qcom: gpucc-sm8250: use parent_hws where possible
clk: qcom: gpucc-sm8150: use parent_hws where possible
clk: qcom: gcc-sm8350: use parent_hws where possible
clk: qcom: gcc-sm8250: use parent_hws where possible
clk: qcom: gcc-sm8150: use parent_hws where possible
clk: qcom: gcc-sdx55: use parent_hws where possible
...
Uses the already in-place infrastructure provided by the
'generic_map_*_batch' functions.
No tweak was needed as it transparently handles the percpu variant.
As arrays don't have delete operations, let it return a error to
user space (default behaviour).
Suggested-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210424214510.806627-2-pctammela@mojatatu.com
Florent Revest says:
====================
BPF's formatted output helpers are currently implemented with
snprintf-like functions which use variadic arguments. The types of all
arguments need to be known at compilation time. BPF_CAST_FMT_ARG casts
all arguments to the size they should be (known at runtime), but the C
type promotion rules cast them back to u64s. On 32 bit architectures,
this can cause misaligned va_lists and generate mangled output.
This series refactors these helpers to avoid variadic arguments. It uses
a "binary printf" instead, where arguments are passed in a buffer
constructed at runtime.
---
Changes in v2:
- Reworded the second patch's description to better describe how
arguments get mangled on 32 bit architectures
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
BPF has three formatted output helpers: bpf_trace_printk, bpf_seq_printf
and bpf_snprintf. Their signatures specify that all arguments are
provided from the BPF world as u64s (in an array or as registers). All
of these helpers are currently implemented by calling functions such as
snprintf() whose signatures take a variable number of arguments, then
placed in a va_list by the compiler to call vsnprintf().
"d9c9e4db bpf: Factorize bpf_trace_printk and bpf_seq_printf" introduced
a bpf_printf_prepare function that fills an array of u64 sanitized
arguments with an array of "modifiers" which indicate what the "real"
size of each argument should be (given by the format specifier). The
BPF_CAST_FMT_ARG macro consumes these arrays and casts each argument to
its real size. However, the C promotion rules implicitely cast them all
back to u64s. Therefore, the arguments given to snprintf are u64s and
the va_list constructed by the compiler will use 64 bits for each
argument. On 64 bit machines, this happens to work well because 32 bit
arguments in va_lists need to occupy 64 bits anyway, but on 32 bit
architectures this breaks the layout of the va_list expected by the
called function and mangles values.
In "88a5c690b6 bpf: fix bpf_trace_printk on 32 bit archs", this problem
had been solved for bpf_trace_printk only with a "horrid workaround"
that emitted multiple calls to trace_printk where each call had
different argument types and generated different va_list layouts. One of
the call would be dynamically chosen at runtime. This was ok with the 3
arguments that bpf_trace_printk takes but bpf_seq_printf and
bpf_snprintf accept up to 12 arguments. Because this approach scales
code exponentially, it is not a viable option anymore.
Because the promotion rules are part of the language and because the
construction of a va_list is an arch-specific ABI, it's best to just
avoid variadic arguments and va_lists altogether. Thankfully the
kernel's snprintf() has an alternative in the form of bstr_printf() that
accepts arguments in a "binary buffer representation". These binary
buffers are currently created by vbin_printf and used in the tracing
subsystem to split the cost of printing into two parts: a fast one that
only dereferences and remembers values, and a slower one, called later,
that does the pretty-printing.
This patch refactors bpf_printf_prepare to construct binary buffers of
arguments consumable by bstr_printf() instead of arrays of arguments and
modifiers. This gets rid of BPF_CAST_FMT_ARG and greatly simplifies the
bpf_printf_prepare usage but there are a few gotchas that change how
bpf_printf_prepare needs to do things.
Currently, bpf_printf_prepare uses a per cpu temporary buffer as a
generic storage for strings and IP addresses. With this refactoring, the
temporary buffers now holds all the arguments in a structured binary
format.
To comply with the format expected by bstr_printf, certain format
specifiers also need to be pre-formatted: %pB and %pi6/%pi4/%pI4/%pI6.
Because vsnprintf subroutines for these specifiers are hard to expose,
we pre-format these arguments with calls to snprintf().
Reported-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210427174313.860948-3-revest@chromium.org
Similarly to seq_buf_bprintf in lib/seq_buf.c, this function writes a
printf formatted string with arguments provided in a "binary
representation" built by functions such as vbin_printf.
Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210427174313.860948-2-revest@chromium.org
In digital_tg_recv_dep_req, it calls nfc_tm_data_received(..,resp).
If nfc_tm_data_received() failed, the callee will free the resp via
kfree_skb() and return error. But in the exit branch, the resp
will be freed again.
My patch sets resp to NULL if nfc_tm_data_received() failed, to
avoid the double free.
Fixes: 1c7a4c24fb ("NFC Digital: Add target NFC-DEP support")
Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pablo Neira Ayuso says:
====================
Netfilter updates for net-next
The following patchset contains Netfilter updates for net-next:
1) Add support for the catch-all set element. This special element
can be used to define a default action to be applied in case that
the set lookup returns no matching element.
2) Fix incorrect #ifdef dependencies in the nftables cgroupsv2
support, from Arnd Bergmann.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
l2tp_tunnel_register() registers a tunnel without fully
initializing its attribute. This can allow another kernel thread
running l2tp_xmit_core() to access the uninitialized data and
then cause a kernel NULL pointer dereference error, as shown below.
Thread 1 Thread 2
//l2tp_tunnel_register()
list_add_rcu(&tunnel->list, &pn->l2tp_tunnel_list);
//pppol2tp_connect()
tunnel = l2tp_tunnel_get(sock_net(sk), info.tunnel_id);
// Fetch the new tunnel
...
//l2tp_xmit_core()
struct sock *sk = tunnel->sock;
...
bh_lock_sock(sk);
//Null pointer error happens
tunnel->sock = sk;
Fix this bug by initializing tunnel->sock before adding the
tunnel into l2tp_tunnel_list.
Reviewed-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Sishuai Gong <sishuai@purdue.edu>
Reported-by: Sishuai Gong <sishuai@purdue.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Variable rc is set to zero but this value is never read as it is
overwritten with a new value later on, hence it is a redundant
assignment and can be removed.
Cleans up the following clang-analyzer warning:
net/smc/af_smc.c:1079:3: warning: Value stored to 'rc' is never read
[clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Variable err is set to -ENOMEM but this value is never read as it is
overwritten with a new value later on, hence it is a redundant
assignment and can be removed.
Cleans up the following clang-analyzer warning:
net/mpls/af_mpls.c:1022:2: warning: Value stored to 'err' is never read
[clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Variable rc is set to zero but this value is never read as it is
overwritten with a new value later on, hence it is a redundant
assignment and can be removed.
Cleans up the following clang-analyzer warning:
net/llc/llc_station.c:86:2: warning: Value stored to 'rc' is never read
[clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
record is being initialized to ctx->open_record but this is never
read as record is overwritten later on. Remove the redundant
initialization.
Cleans up the following clang-analyzer warning:
net/tls/tls_device.c:421:26: warning: Value stored to 'record' during
its initialization is never read [clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Variable nr_sig is being assigned a value however the assignment is
never read, so this redundant assignment can be removed.
Cleans up the following clang-analyzer warning:
net/rds/ib_send.c:297:2: warning: Value stored to 'nr_sig' is never read
[clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Microchip SMI0 Mode is a special mode, where the MDIO Read/Write
commands are part of the PHY Address and the OP Code is always 0. We add
the compatible for this special mode of the bitbanged mdio driver.
Cc: devicetree@vger.kernel.org
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add KSZ88X3 driver support. We add support for the KXZ88X3 three port
switches using the Microchip SMI Interface. They are supported using the
MDIO-Bitbang Interface.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
SMI0 is a mangled version of MDIO. The main low level difference is
the MDIO C22 OP code is always 0, not 0x2 or 0x1 for Read/Write. The
read/write information is instead encoded in the PHY address.
Extend the bit-bang code to allow the op code to be overridden, but
default to normal C22 values. Add an extra compatible to the mdio-gpio
driver, and when this compatible is present, set the op codes to 0.
A higher level driver, sitting on top of the basic MDIO bus driver can
then implement the rest of the microchip SMI0 odderties.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It is a 3-Port 10/100 Ethernet Switch. One CPU-Port and two
Switch-Ports.
Cc: devicetree@vger.kernel.org
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add KSZ88X3 driver support. We add support for the KXZ88X3 three port
switches using the SPI Interface.
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
We add support for the ksz8863 and ksz8873 chips which are
using the same register patterns but other offsets as the
ksz8795.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
In order to get this driver used with other switches the functions need
to use different offsets and register shifts. This patch changes the
direct use of the register defines to register description structures,
which can be set depending on the chips register layout.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch moves the cpu interface selection code to a individual
function specific for ksz8795. It will make it simpler to customize the
code path for different switches supported by this driver.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
The driver can be used on other chips of this type. To reflect
this we rename the drivers prefix from ksz8795 to ksz8.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yangbo Lu says:
====================
Support Ocelot PTP Sync one-step timestamping
This patch-set is to support Ocelot PTP Sync one-step timestamping.
Actually before that, this patch-set cleans up and optimizes the
DSA slave tx timestamp request handling process.
Changes for v2:
- Split tx timestamp optimization patch.
- Updated doc patch.
- Freed skb->cb usage in dsa core driver, and moved to device
drivers.
- Other minor fixes.
Changes for v3:
- Switched sequence of patch #3 and #4 with rebasing to fix build.
- Replaced hard coded 48 of memset(skb->cb, 0, 48) with sizeof().
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Although HWTSTAMP_TX_ONESTEP_SYNC existed in ioctl for hardware timestamp
configuration, the PTP Sync one-step timestamping had never been supported.
This patch is to truely support it.
- ocelot_port_txtstamp_request()
This function handles tx timestamp request by storing
ptp_cmd(tx timestamp type) in OCELOT_SKB_CB(skb)->ptp_cmd,
and additionally for two-step timestamp storing ts_id in
OCELOT_SKB_CB(clone)->ptp_cmd.
- ocelot_ptp_rew_op()
During xmit, this function is called to get rew_op (rewriter option) by
checking skb->cb for tx timestamp request, and configure to transmitting.
Non-onestep-Sync packet with one-step timestamp request falls back to use
two-step timestamp.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Convert to a common ocelot_port_txtstamp_request() for TX timestamp
request handling.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Update timestamping doc for DSA switches to describe current
implementation accurately. On TX, the skb cloning is no longer
in DSA generic code.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Free skb->cb usage in core driver and let device drivers decide to
use or not. The reason having a DSA_SKB_CB(skb)->clone was because
dsa_skb_tx_timestamp() which may set the clone pointer was called
before p->xmit() which would use the clone if any, and the device
driver has no way to initialize the clone pointer.
This patch just put memset(skb->cb, 0, sizeof(skb->cb)) at beginning
of dsa_slave_xmit(). Some new features in the future, like one-step
timestamp may need more bytes of skb->cb to use in
dsa_skb_tx_timestamp(), and p->xmit().
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It was a waste to clone skb directly in dsa_skb_tx_timestamp().
For one-step timestamping, a clone was not needed. For any failure of
port_txtstamp (this may usually happen), the skb clone had to be freed.
So this patch moves skb cloning for tx timestamp out of dsa core, and
let drivers clone skb in port_txtstamp if they really need.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Tested-by: Kurt Kanzenbach <kurt@linutronix.de>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Move ptp_classify_raw out of dsa core driver for handling tx
timestamp request. Let device drivers do this if they want.
Not all drivers want to limit tx timestamping for only PTP
packet.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Tested-by: Kurt Kanzenbach <kurt@linutronix.de>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Check tx timestamp request in core driver at very beginning of
dsa_skb_tx_timestamp(), so that most skbs not requiring tx
timestamp just return. And drop such checking in device drivers.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Tested-by: Kurt Kanzenbach <kurt@linutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The .serdes_get_lane op used the magic value 0xff to indicate a valid
SERDES lane and 0 signaled that a non-SERDES mode was set on the port.
Unfortunately, "0" is also a valid lane ID, so even when these ports
where configured to e.g. RGMII the driver would set them up as SERDES
ports.
- Replace 0xff with 0 to indicate a valid lane ID. The number is on
the one hand just as arbitrary, but it is at least the first valid one
and therefore less of a surprise.
- Follow the other .serdes_get_lane implementations and return -ENODEV
in the case where no SERDES is assigned to the port.
Fixes: f5be107c33 ("net: dsa: mv88e6xxx: Support serdes ports on MV88E6097/6095/6185")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no real need for disabling autonigotiation in config_init().
Leave it enabled by default.
Signed-off-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Variable offset is being assigned a value from a calculation
however the variable is never read, so this redundant variable
can be removed.
Cleans up the following clang-analyzer warning:
net/rxrpc/rxkad.c:579:2: warning: Value stored to 'offset' is never read
[clang-analyzer-deadcode.DeadStores].
net/rxrpc/rxkad.c:485:2: warning: Value stored to 'offset' is never read
[clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use 'hash_for_each_rcu' and 'hash_for_each_safe' instead of hand writing
them. This saves some lines of code, reduce indentation and improve
readability.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
The IPv6 Multicast Router Advertisements parsing has the following two
issues:
For one thing, ICMPv6 MRD Advertisements are smaller than ICMPv6 MLD
messages (ICMPv6 MRD Adv.: 8 bytes vs. ICMPv6 MLDv1/2: >= 24 bytes,
assuming MLDv2 Reports with at least one multicast address entry).
When ipv6_mc_check_mld_msg() tries to parse an Multicast Router
Advertisement its MLD length check will fail - and it will wrongly
return -EINVAL, even if we have a valid MRD Advertisement. With the
returned -EINVAL the bridge code will assume a broken packet and will
wrongly discard it, potentially leading to multicast packet loss towards
multicast routers.
The second issue is the MRD header parsing in
br_ip6_multicast_mrd_rcv(): It wrongly checks for an ICMPv6 header
immediately after the IPv6 header (IPv6 next header type). However
according to RFC4286, section 2 all MRD messages contain a Router Alert
option (just like MLD). So instead there is an IPv6 Hop-by-Hop option
for the Router Alert between the IPv6 and ICMPv6 header, again leading
to the bridge wrongly discarding Multicast Router Advertisements.
To fix these two issues, introduce a new return value -ENODATA to
ipv6_mc_check_mld() to indicate a valid ICMPv6 packet with a hop-by-hop
option which is not an MLD but potentially an MRD packet. This also
simplifies further parsing in the bridge code, as ipv6_mc_check_mld()
already fully checks the ICMPv6 header and hop-by-hop option.
These issues were found and fixed with the help of the mrdisc tool
(https://github.com/troglobit/mrdisc).
Fixes: 4b3087c7e3 ("bridge: Snoop Multicast Router Advertisements")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'audit-pr-20210426' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
Pull audit updates from Paul Moore:
"Another small pull request for audit, most of the patches are
documentation updates with only two real code changes: one to fix a
compiler warning for a dummy function/macro, and one to cleanup some
code since we removed the AUDIT_FILTER_ENTRY ages ago (v4.17)"
* tag 'audit-pr-20210426' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
audit: drop /proc/PID/loginuid documentation Format field
audit: avoid -Wempty-body warning
audit: document /proc/PID/sessionid
audit: document /proc/PID/loginuid
MAINTAINERS: update audit files
audit: further cleanup of AUDIT_FILTER_ENTRY deprecation
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Merge tag 'selinux-pr-20210426' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux updates from Paul Moore:
- Add support for measuring the SELinux state and policy capabilities
using IMA.
- A handful of SELinux/NFS patches to compare the SELinux state of one
mount with a set of mount options. Olga goes into more detail in the
patch descriptions, but this is important as it allows more
flexibility when using NFS and SELinux context mounts.
- Properly differentiate between the subjective and objective LSM
credentials; including support for the SELinux and Smack. My clumsy
attempt at a proper fix for AppArmor didn't quite pass muster so John
is working on a proper AppArmor patch, in the meantime this set of
patches shouldn't change the behavior of AppArmor in any way. This
change explains the bulk of the diffstat beyond security/.
- Fix a problem where we were not properly terminating the permission
list for two SELinux object classes.
* tag 'selinux-pr-20210426' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: add proper NULL termination to the secclass_map permissions
smack: differentiate between subjective and objective task credentials
selinux: clarify task subjective and objective credentials
lsm: separate security_task_getsecid() into subjective and objective variants
nfs: account for selinux security context when deciding to share superblock
nfs: remove unneeded null check in nfs_fill_super()
lsm,selinux: add new hook to compare new mount to an existing mount
selinux: fix misspellings using codespell tool
selinux: fix misspellings using codespell tool
selinux: measure state and policy capabilities
selinux: Allow context mounts for unpriviliged overlayfs
