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bc15bb9146
linux/fs
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Greg Ungerer bc15bb9146 fs: binfmt_elf_efpic: fix personality for ELF-FDPIC 
commit 7c31515857 upstream.

The elf-fdpic loader hard sets the process personality to either
PER_LINUX_FDPIC for true elf-fdpic binaries or to PER_LINUX for normal ELF
binaries (in this case they would be constant displacement compiled with
-pie for example).  The problem with that is that it will lose any other
bits that may be in the ELF header personality (such as the "bug
emulation" bits).

On the ARM architecture the ADDR_LIMIT_32BIT flag is used to signify a
normal 32bit binary - as opposed to a legacy 26bit address binary.  This
matters since start_thread() will set the ARM CPSR register as required
based on this flag.  If the elf-fdpic loader loses this bit the process
will be mis-configured and crash out pretty quickly.

Modify elf-fdpic loader personality setting so that it preserves the upper
three bytes by using the SET_PERSONALITY macro to set it.  This macro in
the generic case sets PER_LINUX and preserves the upper bytes.
Architectures can override this for their specific use case, and ARM does
exactly this.

The problem shows up quite easily running under qemu using the ARM
architecture, but not necessarily on all types of real ARM hardware.  If
the underlying ARM processor does not support the legacy 26-bit addressing
mode then everything will work as expected.

Link: https://lkml.kernel.org/r/20230907011808.2985083-1-gerg@kernel.org
Fixes: 1bde925d23 ("fs/binfmt_elf_fdpic.c: provide NOMMU loader for regular ELF binaries")
Signed-off-by: Greg Ungerer <gerg@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Greg Ungerer <gerg@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-10-06 13:16:29 +02:00
..
9p fs/9p: Remove unused extern declaration 2023-07-20 19:21:48 +00:00
adfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
affs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
afs afs: Fix accidental truncation when storing data 2023-07-04 12:24:32 -07:00
autofs autofs: fix memory leak of waitqueues in autofs_catatonic_mode 2023-09-23 11:14:17 +02:00
befs befs: Replace all non-returning strlcpy with strscpy 2023-05-30 16:42:00 -07:00
bfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
btrfs btrfs: properly report 0 avail for very full file systems 2023-10-06 13:16:26 +02:00
cachefiles v6.5/vfs.file 2023-06-26 10:14:36 -07:00
ceph ceph: drop messages from MDS when unmounting 2023-10-06 13:16:07 +02:00
coda vfs: get rid of old '->iterate' directory operation 2023-08-06 15:08:35 +02:00
configfs fs: consolidate duplicate dt_type helpers 2023-04-03 09:23:54 +02:00
cramfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
crypto fscrypt: Replace 1-element array with flexible array 2023-05-23 19:46:09 -07:00
debugfs debugfs: Correct the 'debugfs_create_str' docs 2023-05-31 19:02:14 +01:00
devpts devpts: simplify two-level sysctl registration for pty_kern_table 2023-03-13 12:36:34 +01:00
dlm dlm: fix plock lookup when using multiple lockspaces 2023-09-13 09:53:54 +02:00
ecryptfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
efivarfs efivarfs: fix statfs() on efivarfs 2023-09-23 11:14:32 +02:00
efs
erofs erofs: release ztailpacking pclusters properly 2023-09-13 09:52:58 +02:00
exfat vfs: get rid of old '->iterate' directory operation 2023-08-06 15:08:35 +02:00
exportfs vfs: get rid of old '->iterate' directory operation 2023-08-06 15:08:35 +02:00
ext2 ext2: fix datatype of block number in ext2_xattr_set2() 2023-09-23 11:14:26 +02:00
ext4 ext4: do not let fstrim block system suspend 2023-10-06 13:15:46 +02:00
f2fs f2fs: avoid false alarm of circular locking 2023-09-19 12:30:23 +02:00
fat splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
freevxfs There is no particular theme here - mainly quick hits all over the tree. 2023-02-23 17:55:40 -08:00
fscache fscache: Use clear_and_wake_up_bit() in fscache_create_volume_work() 2023-01-30 12:51:54 +00:00
fuse fuse: nlookup missing decrement in fuse_direntplus_link 2023-09-19 12:30:23 +02:00
gfs2 gfs2: fix glock shrinker ref issues 2023-10-06 13:16:17 +02:00
hfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
hfsplus splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
hostfs Landlock updates for v6.5-rc1 2023-06-27 17:10:27 -07:00
hpfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
hugetlbfs hugetlb: revert use of page_cache_next_miss() 2023-06-23 16:59:32 -07:00
iomap iomap: Fix possible overflow condition in iomap_write_delalloc_scan 2023-09-23 11:14:17 +02:00
isofs
jbd2 jbd2: correct the end of the journal recovery scan range 2023-09-19 12:30:22 +02:00
jffs2 for-6.5/splice-2023-06-23 2023-06-26 11:52:12 -07:00
jfs jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount 2023-09-23 11:14:26 +02:00
kernfs kernfs: fix missing kernfs_iattr_rwsem locking 2023-09-19 12:30:09 +02:00
lockd fs: lockd: avoid possible wrong NULL parameter 2023-09-13 09:53:33 +02:00
minix splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
netfs netfs: Only call folio_start_fscache() one time for each folio 2023-10-06 13:15:45 +02:00
nfs NFSv4: Fix a state manager thread deadlock regression 2023-10-06 13:16:24 +02:00
nfs_common NFSv4.2: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:52 -07:00
nfsd NFSD: Fix zero NFSv4 READ results when RQ_SPLICE_OK is not set 2023-10-06 13:16:07 +02:00
nilfs2 nilfs2: fix potential use after free in nilfs_gccache_submit_read_data() 2023-10-06 13:16:21 +02:00
nls fs/nls: make load_nls() take a const parameter 2023-07-25 00:30:02 -05:00
notify fanotify: disallow mount/sb marks on kernel internal pseudo fs 2023-07-04 13:29:29 +02:00
ntfs vfs: get rid of old '->iterate' directory operation 2023-08-06 15:08:35 +02:00
ntfs3 driver ntfs3 for linux 6.5 2023-07-07 14:59:38 -07:00
ocfs2 fs: ocfs2: namei: check return value of ocfs2_add_entry() 2023-09-13 09:53:08 +02:00
omfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
openpromfs
orangefs orangefs: Provide a splice-read wrapper 2023-05-24 08:42:16 -06:00
overlayfs ovl: fix incorrect fdput() on aio completion 2023-09-23 11:14:34 +02:00
proc proc: nommu: fix empty /proc/<pid>/maps 2023-10-06 13:15:59 +02:00
pstore pstore/ram: Check start of empty przs during init 2023-09-13 09:53:55 +02:00
qnx4 qnx4: credit contributors in CREDITS 2023-03-14 12:56:30 -06:00
qnx6 qnx6: credit contributor and mark filesystem orphan 2023-03-14 12:56:30 -06:00
quota quota: fix dqput() to follow the guarantees dquot_srcu should provide 2023-09-13 09:53:13 +02:00
ramfs - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
reiserfs reiserfs: Check the return value from __getblk() 2023-09-13 09:52:57 +02:00
romfs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
smb fs/smb/client: Reset password pointer to NULL 2023-10-06 13:16:27 +02:00
squashfs squashfs: fix cache race with migration 2023-07-08 09:29:30 -07:00
sysfs sysfs: Skip empty folders creation 2023-06-15 13:37:53 +02:00
sysv for-6.5/splice-2023-06-23 2023-06-26 11:52:12 -07:00
tracefs tracefs: Add missing lockdown check to tracefs_create_dir() 2023-09-23 11:14:37 +02:00
ubifs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
udf \n 2023-06-29 13:39:51 -07:00
ufs splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
unicode unicode: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:54 -07:00
vboxsf hardening fixes for v6.5-rc6 2023-08-08 14:59:49 -07:00
verity fsverity: skip PKCS#7 parser when keyring is empty 2023-09-13 09:53:55 +02:00
xfs xfs: convert flex-array declarations in xfs attr shortform objects 2023-07-17 08:48:56 -07:00
zonefs zonefs: fix synchronous direct writes to sequential files 2023-08-10 12:59:47 +09:00
aio.c fs/aio: Stop allocating aio rings from HIGHMEM 2023-06-15 09:22:23 +02:00
anon_inodes.c
attr.c attr: block mode changes of symlinks 2023-09-23 11:14:34 +02:00
bad_inode.c fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
binfmt_elf_fdpic.c fs: binfmt_elf_efpic: fix personality for ELF-FDPIC 2023-10-06 13:16:29 +02:00
binfmt_elf_test.c
binfmt_elf.c Merge branch 'expand-stack' 2023-06-28 20:35:21 -07:00
binfmt_flat.c
binfmt_misc.c binfmt_misc: fix shift-out-of-bounds in check_special_flags 2022-12-02 13:57:04 -08:00
binfmt_script.c
buffer.c \n 2023-06-29 13:39:51 -07:00
char_dev.c vfs: Replace all non-returning strlcpy with strscpy 2023-05-15 09:42:01 +02:00
compat_binfmt_elf.c
coredump.c v6.5/vfs.misc 2023-06-26 09:50:21 -07:00
d_path.c fs: d_path: include internal.h 2023-05-17 09:16:59 +02:00
dax.c dax: enable dax fault handler to report VM_FAULT_HWPOISON 2023-06-26 07:54:23 -06:00
dcache.c
direct-io.c - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
drop_caches.c
eventfd.c eventfd: prevent underflow for eventfd semaphores 2023-09-13 09:52:58 +02:00
eventpoll.c v6.5/vfs.misc 2023-06-26 09:50:21 -07:00
exec.c \n 2023-06-29 13:31:44 -07:00
fcntl.c fs.idmapped.v6.3 2023-02-20 11:53:11 -08:00
fhandle.c fsnotify: move fsnotify_open() hook into do_dentry_open() 2023-06-12 10:43:45 +02:00
file_table.c fs: move cleanup from init_file() into its callers 2023-07-02 13:15:49 +02:00
file.c fs: rely on ->iterate_shared to determine f_pos locking 2023-08-06 15:08:36 +02:00
filesystems.c
fs_context.c vfs, security: Fix automount superblock LSM init problem, preventing NFS sb sharing 2023-09-13 09:52:58 +02:00
fs_parser.c ext4: journal_path mount options should follow links 2022-12-01 10:46:54 -05:00
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c writeback: move wb_over_bg_thresh() call outside lock section 2023-06-09 16:25:14 -07:00
fsopen.c
init.c fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
inode.c locking: remove spin_lock_prefetch 2023-08-12 09:18:47 -07:00
internal.h v6.5/vfs.file 2023-06-26 10:14:36 -07:00
ioctl.c fs: port inode_owner_or_capable() to mnt_idmap 2023-01-19 09:24:29 +01:00
Kconfig smb: move client and server files to common directory fs/smb 2023-05-24 16:29:21 -05:00
Kconfig.binfmt
kernel_read_file.c
libfs.c direct_write_fallback(): on error revert the ->ki_pos update from buffered write 2023-10-06 13:16:01 +02:00
locks.c locks: fix KASAN: use-after-free in trace_event_raw_event_filelock_lock 2023-09-23 11:14:17 +02:00
Makefile for-6.5/block-2023-06-23 2023-06-26 12:47:20 -07:00
mbcache.c ext4: fix deadlock due to mbcache entry corruption 2022-12-08 21:49:25 -05:00
mnt_idmapping.c fs: move mnt_idmap 2023-01-19 09:24:30 +01:00
mount.h
mpage.c mpage: use folios in bio end_io handler 2023-04-18 16:30:02 -07:00
namei.c fs: Fix error checking for d_hash_and_lookup() 2023-09-13 09:52:58 +02:00
namespace.c v6.5/vfs.mount 2023-06-26 10:27:04 -07:00
nsfs.c kill the last remaining user of proc_ns_fget() 2023-04-20 22:55:35 -04:00
open.c open: make RESOLVE_CACHED correctly test for O_TMPFILE 2023-08-06 15:08:35 +02:00
pipe.c pipe: check for IOCB_NOWAIT alongside O_NONBLOCK 2023-05-12 17:17:27 +02:00
pnode.c fs: allow to mount beneath top mount 2023-05-19 04:30:22 +02:00
pnode.h fs: allow to mount beneath top mount 2023-05-19 04:30:22 +02:00
posix_acl.c acl: don't depend on IOP_XATTR 2023-03-06 09:59:20 +01:00
proc_namespace.c tty, proc, kernfs, random: Use copy_splice_read() 2023-05-24 08:42:16 -06:00
read_write.c splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
readdir.c vfs: get rid of old '->iterate' directory operation 2023-08-06 15:08:35 +02:00
remap_range.c fs: use UB-safe check for signed addition overflow in remap_verify_area 2023-05-24 11:03:59 +02:00
select.c
seq_file.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
signalfd.c
splice.c splice: fsnotify_access(in), fsnotify_modify(out) on success in tee 2023-09-13 09:52:58 +02:00
stack.c
stat.c fs.idmapped.v6.3 2023-02-20 11:53:11 -08:00
statfs.c statfs: enforce statfs[64] structure initialization 2023-05-17 15:20:17 +02:00
super.c \n 2023-06-29 13:39:51 -07:00
sync.c
sysctls.c sysctl: Refactor base paths registrations 2023-05-23 21:43:26 -07:00
timerfd.c
userfaultfd.c Merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes. 2023-06-23 16:58:19 -07:00
utimes.c fs.idmapped.v6.3 2023-02-20 11:53:11 -08:00
xattr.c fs: don't call posix_acl_listxattr in generic_listxattr 2023-05-17 15:25:20 +02:00