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linux-brain/fs/ext4
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Eric Biggers 52d8e5b0ab ext4: report correct st_size for encrypted symlinks 
commit 8c4bca10ceafc43b1ca0a9fab5fa27e13cbce99e upstream.

The stat() family of syscalls report the wrong size for encrypted
symlinks, which has caused breakage in several userspace programs.

Fix this by calling fscrypt_symlink_getattr() after ext4_getattr() for
encrypted symlinks.  This function computes the correct size by reading
and decrypting the symlink target (if it's not already cached).

For more details, see the commit which added fscrypt_symlink_getattr().

Fixes: f348c25232 ("ext4 crypto: add symlink encryption")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210702065350.209646-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2021-09-12 08:56:38 +02:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile ext4: add basic fs-verity support 2019-08-12 19:33:50 -07:00
acl.c ext4: compare old and new mode before setting update_mode flag 2018-12-10 00:22:38 -05:00
acl.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
balloc.c ext4: shrink race window in ext4_should_retry_alloc() 2021-04-07 14:47:38 +02:00
bitmap.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
block_validity.c ext4: correctly restore system zone info when remount fails 2020-09-03 11:26:57 +02:00
dir.c ext4: avoid utf8_strncasecmp() with unstable name 2020-06-24 17:50:48 +02:00
ext4.h ext4: fix EXT4_MAX_LOGICAL_BLOCK macro 2021-08-26 08:36:11 -04:00
ext4_extents.h ext4: fix EXT_MAX_EXTENT/INDEX to check for zeroed eh_max 2020-06-22 09:31:15 +02:00
ext4_jbd2.c ext4: shutdown should not prevent get_write_access 2018-02-18 22:07:36 -05:00
ext4_jbd2.h ext4: use jbd2_inode dirty range scoping 2019-06-20 17:26:26 -04:00
extents.c ext4: fix kernel infoleak via ext4_extent_header 2021-07-14 16:53:03 +02:00
extents_status.c ext4: remove check for zero nr_to_scan in ext4_es_scan() 2021-07-14 16:53:03 +02:00
extents_status.h ext4: use percpu_counters for extent_status cache hits/misses 2019-08-28 11:19:23 -04:00
file.c ext4: don't leak old mountpoint samples 2021-01-19 18:26:13 +01:00
fsmap.c ext4: limit entries returned when counting fsmap records 2020-10-29 09:57:55 +01:00
fsmap.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
fsync.c ext4: fix race between ext4_sync_parent() and rename() 2020-06-22 09:31:16 +02:00
hash.c ext4: fix kernel oops caused by spurious casefold flag 2019-09-03 01:43:17 -04:00
ialloc.c ext4: fix avefreec in find_group_orlov 2021-07-14 16:53:03 +02:00
indirect.c ext4: clean up kerneldoc warnigns when building with W=1 2019-06-19 16:30:03 -04:00
inline.c ext4: fix race writing to an inline_data file while its xattrs are changing 2021-09-12 08:56:38 +02:00
inode.c ext4: fix bh ref count on error paths 2021-04-07 14:47:38 +02:00
ioctl.c ext4: fix superblock checksum failure when setting password salt 2021-01-19 18:26:17 +01:00
mballoc.c ext4: use ext4_grp_locked_error in mb_find_extent 2021-07-14 16:53:03 +02:00
mballoc.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
migrate.c ext4: fix race between writepages and enabling EXT4_EXTENTS_FL 2020-02-28 17:22:23 +01:00
mmp.c ext4: don't assume that mmp_nodename/bdevname have NUL 2020-02-19 19:52:58 +01:00
move_extent.c ext4: use jbd2_inode dirty range scoping 2019-06-20 17:26:26 -04:00
namei.c ext4: fix potential htree corruption when growing large_dir directories 2021-08-12 13:21:02 +02:00
page-io.c ext4: fix deadlock allocating crypto bounce page from mempool 2020-02-11 04:35:32 -08:00
readpage.c ext4: fix deadlock allocating bio_post_read_ctx from mempool 2020-02-24 08:36:29 +01:00
resize.c ext4: fix error handling code in add_new_gdb 2020-11-05 11:43:35 +01:00
super.c ext4: return error code when ext4_fill_flex_info() fails 2021-07-14 16:53:03 +02:00
symlink.c ext4: report correct st_size for encrypted symlinks 2021-09-12 08:56:38 +02:00
sysfs.c ext4: shrink race window in ext4_should_retry_alloc() 2021-04-07 14:47:38 +02:00
truncate.h ext4: handle layout changes to pinned DAX mappings 2018-07-29 17:00:22 -04:00
verity.c ext4: fix error handling in ext4_end_enable_verity() 2021-05-26 12:05:21 +02:00
xattr.c ext4: add reclaim checks to xattr code 2021-03-30 14:35:29 +02:00
xattr.h ext4: add extra checks to ext4_xattr_block_get() 2018-03-30 20:04:11 -04:00
xattr_security.c ext4: use XATTR_CREATE in ext4_initxattrs() 2018-05-10 11:52:14 -04:00
xattr_trusted.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xattr_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00