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linux/fs/jfs
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Jori Koolstra fe136426e3 jfs: nlink overflow in jfs_rename 
[ Upstream commit 9218dc26fd ]

If nlink is maximal for a directory (-1) and inside that directory you
perform a rename for some child directory (not moving from the parent),
then the nlink of the first directory is first incremented and later
decremented. Normally this is fine, but when nlink = -1 this causes a
wrap around to 0, and then drop_nlink issues a warning.

After applying the patch syzbot no longer issues any warnings. I also
ran some basic fs tests to look for any regressions.

Signed-off-by: Jori Koolstra <jkoolstra@xs4all.nl>
Reported-by: syzbot+9131ddfd7870623b719f@syzkaller.appspotmail.com
Closes: https://syzbot.org/bug?extid=9131ddfd7870623b719f
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:20:09 -05:00
..
acl.c jfs: convert to ctime accessor functions 2023-07-24 10:30:01 +02:00
file.c Fixes and cleanups for JFS filesystem 2025-07-31 10:27:11 -07:00
inode.c jfs: Verify inode mode when loading from disk 2025-09-18 09:08:11 -05:00
ioctl.c tree-wide: s/struct fileattr/struct file_kattr/g 2025-07-04 16:14:39 +02:00
jfs_acl.h fs: port ->set_acl() to pass mnt_idmap 2023-01-19 09:24:27 +01:00
jfs_btree.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_debug.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
jfs_debug.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_dinode.h jfs: define xtree root and page independently 2023-10-13 10:39:25 -05:00
jfs_discard.c jfs: Fix null-ptr-deref in jfs_ioc_trim 2025-04-03 09:11:42 -05:00
jfs_discard.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_dmap.c jfs: fix metapage reference count leak in dbAllocCtl 2025-07-29 08:34:57 -05:00
jfs_dmap.h jfs: Fix array index bounds check in dbAdjTree 2020-11-13 16:03:07 -06:00
jfs_dtree.c jfs: avoid -Wtautological-constant-out-of-range-compare warning 2026-02-26 14:59:20 -08:00
jfs_dtree.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_extent.c jfs: add check read-only before txBeginAnon() call 2025-02-19 15:28:49 -06:00
jfs_extent.h jfs: remove unused declarations for jfs 2022-10-18 08:50:26 -05:00
jfs_filsys.h jfs: convert jfs to use the new mount api 2024-10-08 14:41:53 +02:00
jfs_imap.c jfs: Prevent copying of nlink with value 0 from disk inode 2025-02-20 09:56:40 -06:00
jfs_imap.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_incore.h quota: Properly annotate i_dquot arrays with __rcu 2024-02-08 12:04:59 +01:00
jfs_inode.c jfs: convert to new timestamp accessors 2023-10-18 14:08:23 +02:00
jfs_inode.h tree-wide: s/struct fileattr/struct file_kattr/g 2025-07-04 16:14:39 +02:00
jfs_lock.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_logmgr.c jfs: Add missing set_freezable() for freezable kthread 2026-03-04 07:20:09 -05:00
jfs_logmgr.h jfs: port block device access to file 2024-02-25 12:05:26 +01:00
jfs_metapage.c treewide: remove MIGRATEPAGE_SUCCESS 2025-09-13 16:54:50 -07:00
jfs_metapage.h jfs: Change metapage->page to metapage->folio 2024-05-27 20:37:06 -05:00
jfs_mount.c JFS: Remove unnecessary parentheses 2025-09-18 09:08:11 -05:00
jfs_superblock.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_txnmgr.c jfs: fix uninitialized waitqueue in transaction manager 2025-09-18 09:08:11 -05:00
jfs_txnmgr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_umount.c jfs: Fix a typo in function jfs_umount 2022-11-10 15:08:00 -06:00
jfs_unicode.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jfs_unicode.h fs/jfs: Use common ucs2 upper case table 2023-08-30 08:55:52 -05:00
jfs_xattr.h jfs: move jfs_xattr_handlers to .rodata 2023-10-09 16:24:19 +02:00
jfs_xtree.c jfs: jfs_xtree: replace XT_GETPAGE macro with xt_getpage() 2025-07-14 17:08:14 -05:00
jfs_xtree.h jfs: define xtree root and page independently 2023-10-13 10:39:25 -05:00
Kconfig 22 smb3/cifs client fixes and two related changes (for unicode mapping) 2023-08-30 21:01:40 -07:00
Makefile fs/jfs: Use common ucs2 upper case table 2023-08-30 08:55:52 -05:00
namei.c jfs: nlink overflow in jfs_rename 2026-03-04 07:20:09 -05:00
resize.c jfs: use sb_bdev_nr_blocks 2021-10-18 14:43:23 -06:00
super.c new helper: set_default_d_op() 2025-06-10 22:21:16 -04:00
symlink.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
xattr.c jfs: fix slab-out-of-bounds read in ea_get() 2025-02-19 16:20:14 -06:00