WARNING in ext4_xattr_set_entry

Status: upstream: reported C repro on 2024/05/26 21:44
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+7bcd80feb68037cb0808@syzkaller.appspotmail.com
First crash: 811d, last: 1d05h
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2024/07/06 upstream (ToT) 1dd28064d416 C [report] WARNING in ext4_xattr_inode_lookup_create
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ext4_xattr_set_entry (2) ext4 -1 syz, C error 9 823d 857d 0/29 upstream: reported C repro on 2024/04/11 08:11
upstream WARNING in ext4_xattr_set_entry ext4 -1 syz, C unreliable 7 1989d 2072d 20/29 fixed on 2021/11/10 00:50
linux-4.19 WARNING in ext4_xattr_set_entry -1 syz, C done 12 1987d 2121d 1/1 fixed on 2021/04/07 11:11
linux-4.14 WARNING in ext4_xattr_set_entry -1 syz, C done 19 1989d 2145d 1/1 fixed on 2021/04/07 11:21
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/07/26 16:38 17m retest repro linux-5.15.y report log
2026/07/26 16:38 18m retest repro linux-5.15.y report log
2026/07/08 11:13 19m retest repro linux-5.15.y report log
2026/07/08 11:13 15m retest repro linux-5.15.y report log
2026/07/08 11:13 16m retest repro linux-5.15.y report log
2026/06/14 02:25 17m retest repro linux-5.15.y report log
2026/05/07 07:09 22m retest repro linux-5.15.y report log
2026/05/07 07:09 16m retest repro linux-5.15.y report log
2026/04/21 22:13 24m retest repro linux-5.15.y report log
2026/04/21 22:13 24m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2026/03/20 05:40 0m bisect fix linux-5.15.y error job log
2024/12/26 23:05 2h07m bisect fix linux-5.15.y OK (0) job log log
2024/08/16 09:18 3h04m bisect fix linux-5.15.y OK (0) job log log

Sample crash report:
loop0: detected capacity change from 0 to 512
EXT4-fs (loop0): orphan cleanup on readonly fs
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4397 at fs/ext4/xattr.c:1669 ext4_xattr_set_entry+0x385b/0x3f70 fs/ext4/xattr.c:1669
Modules linked in:
CPU: 0 PID: 4397 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ext4_xattr_set_entry+0x385b/0x3f70 fs/ext4/xattr.c:1669
Code: ff 49 bf 00 00 00 00 00 fc ff df 43 c6 44 3e 04 f8 4c 8b 74 24 18 e9 b9 fd ff ff e8 bf 94 5d ff e9 d2 ef ff ff e8 b5 94 5d ff <0f> 0b e9 71 d2 ff ff e8 a9 94 5d ff e9 2a fb ff ff e8 9f 94 5d ff
RSP: 0018:ffffc9000325f100 EFLAGS: 00010293
RAX: ffffffff821b67fb RBX: ffff88806eb05260 RCX: ffff88807caa0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000325f370 R08: 0000000000000001 R09: 1ffffffff203dc2d
R10: dffffc0000000000 R11: fffffbfff203dc2e R12: 0000000000000000
R13: ffff888068be8038 R14: ffffc9000325f660 R15: dffffc0000000000
FS:  00005555729cc500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd1e1e3e9c CR3: 000000002b52c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_xattr_block_set+0x4d7/0x2ce0 fs/ext4/xattr.c:1926
 ext4_xattr_move_to_block fs/ext4/xattr.c:2620 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2695 [inline]
 ext4_expand_extra_isize_ea+0xebe/0x18e0 fs/ext4/xattr.c:2783
 __ext4_expand_extra_isize+0x301/0x3e0 fs/ext4/inode.c:5924
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5967 [inline]
 __ext4_mark_inode_dirty+0x444/0x6c0 fs/ext4/inode.c:6045
 ext4_evict_inode+0xa55/0x1050 fs/ext4/inode.c:284
 evict+0x4b6/0x8b0 fs/inode.c:647
 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472
 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006
 mount_bdev+0x28a/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x247/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f962b62734a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc9c4002c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc9c400350 RCX: 00007f962b62734a
RDX: 0000200000000180 RSI: 00002000000001c0 RDI: 00007ffc9c400310
RBP: 0000200000000180 R08: 00007ffc9c400350 R09: 000000000080078b
R10: 000000000080078b R11: 0000000000000246 R12: 00002000000001c0
R13: 00007ffc9c400310 R14: 0000000000000491 R15: 00002000000000c0
 </TASK>

Crashes (125):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/14 21:47 linux-5.15.y aabd761612db 6f9b3e89 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/12/19 09:40 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2024/10/14 19:09 linux-5.15.y 3a5928702e71 084d8178 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2024/07/06 09:18 linux-5.15.y f45bea23c39c 2a40360c .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/07/25 19:08 linux-5.15.y c79648372d02 fb8f743d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 WARNING in ext4_xattr_set_entry
2025/03/07 05:54 linux-5.15.y c16c81c81336 831e3629 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 WARNING in ext4_xattr_set_entry
2025/01/23 07:00 linux-5.15.y 4735586da88e a44b0418 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in ext4_xattr_set_entry
2026/08/15 07:21 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2026/08/14 19:14 linux-5.15.y aabd761612db 6f9b3e89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2026/07/08 15:50 linux-5.15.y c86c4726e7f0 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2026/07/08 15:25 linux-5.15.y c86c4726e7f0 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2026/02/17 21:49 linux-5.15.y e45d5d41c134 06ec4f7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/12/28 15:09 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/12/27 09:02 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/12/25 03:36 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/12/19 09:25 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/26 21:39 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/17 18:43 linux-5.15.y 29e53a5b1c4f 7adf5298 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/09 23:43 linux-5.15.y 29e53a5b1c4f 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/09 22:20 linux-5.15.y 29e53a5b1c4f 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/09 22:19 linux-5.15.y 29e53a5b1c4f 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/04 00:27 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/03 13:05 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/02 06:01 linux-5.15.y 43bb85222e53 267f56c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/10/01 07:48 linux-5.15.y 43bb85222e53 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/09/25 03:55 linux-5.15.y 43bb85222e53 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/09/23 10:58 linux-5.15.y 43bb85222e53 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/09/20 04:25 linux-5.15.y 43bb85222e53 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/09/19 23:38 linux-5.15.y 43bb85222e53 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/09/19 00:24 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/09/18 02:55 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/09/18 02:54 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/20 13:33 linux-5.15.y c79648372d02 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/19 10:35 linux-5.15.y c79648372d02 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/17 13:21 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/16 15:04 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/09 23:13 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/08 06:59 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/07 11:09 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/07 11:07 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/06 22:53 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 23:13 linux-5.15.y c79648372d02 ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:58 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:58 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:57 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:57 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:56 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:55 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:55 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:55 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/08/05 10:55 linux-5.15.y c79648372d02 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2024/05/26 21:43 linux-5.15.y c61bd26ae81a a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ext4_xattr_set_entry
2025/06/15 14:30 linux-5.15.y 1c700860e8bc 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ext4_xattr_set_entry
* Struck through repros no longer work on HEAD.