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Kees Cook f9c0a39d95 binfmt_elf: Only report padzero() errors when PROT_WRITE 
Errors with padzero() should be caught unless we're expecting a
pathological (non-writable) segment. Report -EFAULT only when PROT_WRITE
is present.

Additionally add some more documentation to padzero(), elf_map(), and
elf_load().

Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-mm@kvack.org
Suggested-by: Eric Biederman <ebiederm@xmission.com>
Tested-by: Pedro Falcato <pedro.falcato@gmail.com>
Signed-off-by: Sebastian Ott <sebott@redhat.com>
Link: https://lore.kernel.org/r/20230929032435.2391507-5-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
2023-10-03 19:48:44 -07:00
..
9p
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:25:26 -07:00
adfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
affs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
afs
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:25:26 -07:00
autofs
Merge tag 'v6.6-vfs.autofs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 11:39:14 -07:00
befs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
bfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
btrfs
Merge tag 'for-6.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
2023-09-12 11:28:00 -07:00
cachefiles
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:25:26 -07:00
ceph
Merge tag 'ceph-for-6.6-rc1' of https://github.com/ceph/ceph-client
2023-09-06 12:10:15 -07:00
coda
Merge tag 'v6.6-vfs.ctime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 09:31:32 -07:00
configfs
configfs: convert to ctime accessor functions
2023-07-13 10:28:05 +02:00
cramfs
Merge tag 'v6.6-vfs.super' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 11:04:18 -07:00
crypto
fscrypt: Replace 1-element array with flexible array
2023-05-23 19:46:09 -07:00
debugfs
Merge tag 'char-misc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2023-09-01 09:53:54 -07:00
devpts
Merge tag 'v6.6-vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 10:17:14 -07:00
dlm
dlm: fix plock lookup when using multiple lockspaces
2023-08-25 10:31:39 -05:00
ecryptfs
Merge tag 'v6.6-vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 10:17:14 -07:00
efivarfs
efivarfs: fix statfs() on efivarfs
2023-09-11 09:10:02 +00:00
efs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
erofs
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:25:26 -07:00
exfat
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
exportfs
exportfs: remove kernel-doc warnings in exportfs
2023-08-29 17:45:22 -04:00
ext2
Merge tag 'for_v6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2023-08-30 12:10:50 -07:00
ext4
Merge tag 'ext4_for_linus-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
2023-09-17 10:33:53 -07:00
f2fs
Merge tag 'f2fs-for-6-6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
2023-09-02 15:37:59 -07:00
fat
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
freevxfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
fscache
…
fuse
Merge tag 'fuse-update-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
2023-09-05 12:45:55 -07:00
gfs2
Merge tag 'gfs2-v6.5-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
2023-09-05 13:00:28 -07:00
hfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
hfsplus
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
hostfs
hostfs: convert to ctime accessor functions
2023-07-24 10:30:00 +02:00
hpfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
hugetlbfs
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:25:26 -07:00
iomap
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
isofs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
jbd2
Merge tag 'ext4_for_linus-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
2023-09-17 10:33:53 -07:00
jffs2
jffs2: convert to ctime accessor functions
2023-07-24 10:30:01 +02:00
jfs
Merge tag 'jfs-6.6' of github.com:kleikamp/linux-shaggy
2023-08-31 15:25:01 -07:00
kernfs
Merge tag 'driver-core-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2023-09-01 09:43:18 -07:00
lockd
SUNRPC: Add enum svc_auth_status
2023-08-29 17:45:22 -04:00
minix
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
netfs
Move netfs_extract_iter_to_sg() to lib/scatterlist.c
2023-06-08 13:42:33 +02:00
nfs
Merge tag 'nfs-for-6.6-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
2023-08-31 15:36:41 -07:00
nfs_common
…
nfsd
Merge tag 'nfsd-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
2023-09-15 16:48:44 -07:00
nilfs2
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
nls
nls: Hide new NLS_UCS2_UTILS
2023-08-31 12:07:34 -05:00
notify
dnotify: Pass argument of fcntl_dirnotify as int
2023-07-10 14:36:12 +02:00
ntfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
ntfs3
ntfs3: drop inode references in ntfs_put_super()
2023-09-07 10:23:37 -07:00
ocfs2
Merge tag 'ext4_for_linus-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
2023-08-31 15:18:15 -07:00
omfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
openpromfs
openpromfs: convert to ctime accessor functions
2023-07-24 10:30:03 +02:00
orangefs
fs: drop the timespec64 argument from update_time
2023-08-11 09:04:57 +02:00
overlayfs
ovl: fix incorrect fdput() on aio completion
2023-09-04 18:27:38 +03:00
proc
Merge tag 'mm-stable-2023-09-04-14-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-09-05 10:56:27 -07:00
pstore
Merge tag 'pstore-v6.6-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2023-09-02 10:45:17 -07:00
qnx4
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
qnx6
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
quota
Merge tag 'for_v6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2023-08-30 12:10:50 -07:00
ramfs
ramfs: convert to ctime accessor functions
2023-07-24 10:30:04 +02:00
reiserfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
romfs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
smb
Merge tag '6.6-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
2023-09-17 10:41:42 -07:00
squashfs
squashfs: convert to ctime accessor functions
2023-07-24 10:30:05 +02:00
sysfs
sysfs: Skip empty folders creation
2023-06-15 13:37:53 +02:00
sysv
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
tracefs
tracefs/eventfs: Use list_for_each_srcu() in dcache_dir_open_wrapper()
2023-09-11 22:05:02 -04:00
ubifs
fs: drop the timespec64 argument from update_time
2023-08-11 09:04:57 +02:00
udf
Merge tag 'for_v6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2023-08-30 12:10:50 -07:00
ufs
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
unicode
…
vboxsf
Merge tag 'v6.6-vfs.ctime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 09:31:32 -07:00
verity
fsverity: skip PKCS#7 parser when keyring is empty
2023-08-20 10:33:43 -07:00
xfs
Merge tag 'xfs-6.6-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
2023-08-30 12:34:12 -07:00
zonefs
Merge tag 'iomap-6.6-merge-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
2023-08-28 11:59:52 -07:00
aio.c
Merge tag 'x86_shstk_for_6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2023-08-31 12:20:12 -07:00
anon_inodes.c
…
attr.c
Merge tag 'v6.6-vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 10:17:14 -07:00
bad_inode.c
fs: drop the timespec64 argument from update_time
2023-08-11 09:04:57 +02:00
binfmt_elf_fdpic.c
binfmt_elf_fdpic: support 64-bit systems
2023-08-23 14:17:42 -07:00
binfmt_elf_test.c
…
binfmt_elf.c
binfmt_elf: Only report padzero() errors when PROT_WRITE
2023-10-03 19:48:44 -07:00
binfmt_flat.c
…
binfmt_misc.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
binfmt_script.c
…
buffer.c
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -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
Merge tag 'v6.5/vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
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
mm: remove enum page_entry_size
2023-08-24 16:20:30 -07:00
dcache.c
fs/dcache: Replace printk and WARN_ON by WARN
2023-08-19 13:41:11 +02:00
direct-io.c
Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-06-28 10:28:11 -07:00
drop_caches.c
fs: drop_caches: draining pages before dropping caches
2023-08-18 10:12:11 -07:00
eventfd.c
eventfd: prevent underflow for eventfd semaphores
2023-07-11 11:41:34 +02:00
eventpoll.c
epoll: simplify ep_alloc()
2023-07-26 14:56:07 +02:00
exec.c
Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:53:51 -07:00
fcntl.c
fcntl: Cast commands with int args explicitly
2023-07-10 14:36:11 +02:00
fhandle.c
fsnotify: move fsnotify_open() hook into do_dentry_open()
2023-06-12 10:43:45 +02:00
file_table.c
fs: use __fput_sync in close(2)
2023-08-08 19:36:51 +02:00
file.c
Merge tag 'v6.6-vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 10:17:14 -07:00
filesystems.c
…
fs_context.c
Merge tag 'v6.6-vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 10:17:14 -07:00
fs_parser.c
…
fs_pin.c
…
fs_struct.c
kill do_each_thread()
2023-08-21 13:46:25 -07:00
fs_types.c
…
fs-writeback.c
super: make locking naming consistent
2023-08-21 14:36:57 +02:00
fsopen.c
fs: add FSCONFIG_CMD_CREATE_EXCL
2023-08-14 18:48:02 +02:00
init.c
…
inode.c
Merge tag 'v6.6-vfs.super' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 11:04:18 -07:00
internal.h
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
ioctl.c
Merge tag 'v6.6-vfs.super' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 11:04:18 -07:00
Kconfig
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
2023-08-29 20:21:42 -07:00
Kconfig.binfmt
riscv: support the elf-fdpic binfmt loader
2023-08-23 14:17:43 -07:00
kernel_read_file.c
fs: Fix kernel-doc warnings
2023-08-19 12:12:12 +02:00
libfs.c
Merge tag 'ext4_for_linus-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
2023-08-31 15:18:15 -07:00
locks.c
Merge tag 'nfsd-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
2023-08-31 15:32:18 -07:00
Makefile
fs: add CONFIG_BUFFER_HEAD
2023-08-02 09:13:09 -06:00
mbcache.c
…
mnt_idmapping.c
…
mount.h
…
mpage.c
…
namei.c
fs: Fix kernel-doc warnings
2023-08-19 12:12:12 +02:00
namespace.c
Merge tag 'v6.5/vfs.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-06-26 10:27:04 -07:00
nsfs.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
open.c
Merge tag 'v6.6-vfs.fchmodat2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 11:25:27 -07:00
pipe.c
Merge tag 'v6.6-vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2023-08-28 10:17:14 -07:00
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
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
proc_namespace.c
tty, proc, kernfs, random: Use copy_splice_read()
2023-05-24 08:42:16 -06:00
read_write.c
fs: Fix one kernel-doc comment
2023-08-15 08:32:45 +02:00
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
…
signalfd.c
…
splice.c
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:25:26 -07:00
stack.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
stat.c
stat: remove no-longer-used helper macros
2023-09-17 10:46:12 -07:00
statfs.c
statfs: enforce statfs[64] structure initialization
2023-05-17 15:20:17 +02:00
super.c
fs: export sget_dev()
2023-08-31 12:47:15 +02:00
sync.c
…
sysctls.c
sysctl: Refactor base paths registrations
2023-05-23 21:43:26 -07:00
timerfd.c
…
userfaultfd.c
mm: userfaultfd: remove stale comment about core dump locking
2023-08-24 16:20:27 -07:00
utimes.c
…
xattr.c
tmpfs,xattr: GFP_KERNEL_ACCOUNT for simple xattrs
2023-08-22 10:57:46 +02:00