WARNING in shmem_evict_inode (3)

Status: upstream: reported on 2024/05/24 23:40
Subsystems: mm
Labels: prio:normal
[Documentation on labels]
Reported-by: syzbot+d159dee03e75571264d4@syzkaller.appspotmail.com
First crash: 830d, last: 12d
✨ AI Jobs (5)
ID Workflow Result Correct Bug Created Started Finished Revision
96938d81 repro-c 💥 WARNING in shmem_evict_inode (3) 2026/08/09 18:24 2026/08/09 18:43 2026/08/10 03:20 5d63f80b
8f8349ea repro-c 💥 WARNING in shmem_evict_inode (3) 2026/08/06 14:11 2026/08/06 14:11 2026/08/06 23:25 c38879ea
e452e71f assessment-security DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in shmem_evict_inode (3) 2026/06/01 06:44 2026/06/01 06:44 2026/06/01 08:15 6b4a8443
a5796f26 assessment-security 💥 WARNING in shmem_evict_inode (3) 2026/05/15 10:33 2026/05/15 10:33 2026/05/15 10:34 9cd3beaa
476f3860 repro WARNING in shmem_evict_inode (3) 2026/03/07 12:19 2026/03/07 12:19 2026/03/07 12:29 31e9c887
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [mm?] WARNING in shmem_evict_inode (3) 0 (1) 2024/05/24 23:40
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in shmem_evict_inode (2) mm -1 5 953d 1060d 0/29 auto-obsoleted due to no activity on 2024/04/28 17:43
upstream WARNING in shmem_evict_inode mm -1 syz done unreliable 4 1169d 1328d 0/29 auto-obsoleted due to no activity on 2023/09/25 00:58
linux-6.1 WARNING in shmem_evict_inode origin:lts-only -1 syz, C done 7 652d 677d 0/3 upstream: reported C repro on 2024/10/21 21:43

Sample crash report:
------------[ cut here ]------------
inode->i_blocks
WARNING: mm/shmem.c:1441 at shmem_evict_inode+0xa25/0xa80 mm/shmem.c:1441, CPU#0: syz.9.7879/7858
Modules linked in:
CPU: 0 UID: 0 PID: 7858 Comm: syz.9.7879 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:shmem_evict_inode+0xa25/0xa80 mm/shmem.c:1441
Code: 8b 05 2f fd 5a 11 48 3b 84 24 00 01 00 00 75 1f 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 92 74 c2 09 cc e8 bc d1 b4 ff 90 <0f> 0b 90 eb 81 e8 d1 70 bf 09 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c
RSP: 0018:ffffc90004e2fa40 EFLAGS: 00010246
RAX: ffffffff82124314 RBX: 0000000000000008 RCX: 0000000000080000
RDX: ffffc90013b0e000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90004e2fb90 R08: ffffc90004e2f9c7 R09: 1ffff920009c5f38
R10: dffffc0000000000 R11: fffff520009c5f39 R12: ffff888036a4f9e8
R13: ffff888036a4f9b0 R14: ffff88801c2d4c00 R15: ffff888036a4fa10
FS:  00007fe40ddd56c0(0000) GS:ffff888124f4c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 00000000936d6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 evict+0x624/0xb50 fs/inode.c:825
 dentry_kill+0x1b9/0x880 fs/dcache.c:826
 finish_dput+0x1a/0x260 fs/dcache.c:1001
 __fput+0x675/0xa50 fs/file_table.c:520
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe40cf9e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fe40ddd5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000200000000000 RBX: 00007fe40d226090 RCX: 00007fe40cf9e019
RDX: b635773f07ebbeef RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fe40d03500c R08: ffffffffffffffff R09: 0000000040ead000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe40d226128 R14: 00007fe40d226090 R15: 00007fe40d34fa48
 </TASK>

Crashes (101):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/02 04:31 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in shmem_evict_inode
2026/05/01 09:57 upstream 26fd6bff2c05 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in shmem_evict_inode
2025/12/16 05:18 upstream 8f0b4cce4481 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in shmem_evict_inode
2026/08/17 15:08 upstream 8d3ae59288f1 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in shmem_evict_inode
2026/08/10 09:17 upstream db2ddb871435 558388e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/07/29 22:56 upstream fc02acf6ac0c 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/07/16 12:57 upstream 37e2f878a7a6 851bd571 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/07/15 16:23 upstream 58717b2a1365 a4ed0f4f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/07/10 01:13 upstream a635d6748234 4167ee25 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/07/08 02:00 upstream 0e35b9b6ec0f 88a4b44c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/06/28 11:35 upstream 780d569e6c4b fb92f11c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/06/26 08:14 upstream 4edcdefd4083 7ff32d8b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/06/13 20:10 upstream 062871f1371b 4f06757f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/06/04 10:53 upstream ba3e43a9e601 197909be .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/05/28 19:54 upstream eb3f4b7426cf 9a5a7e5e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/05/23 09:05 upstream cca95436be15 c69befb3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/05/19 17:28 upstream ab5fce87a778 2aa09d96 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/05/17 04:24 upstream 6916d5703ddf de5aae85 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/05/16 01:37 upstream d458a240344c 81fb92f3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/21 04:16 upstream b4e07588e743 3f2e655b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/13 23:31 upstream 26ff969926a0 1a086e7c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/12 04:05 upstream e753c16cb3dd 38c8e246 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/09 23:07 upstream a55f7f5f29b3 38c8e246 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/09 04:11 upstream 7f87a5ea75f0 38c8e246 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/07 03:36 upstream bfe62a454542 4440e7c2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/03 17:26 upstream d8a9a4b11a13 4440e7c2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/01 02:43 upstream d0c3bcd5b897 ef441708 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/03/27 11:45 upstream 46b513250491 ef441708 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/03/25 08:19 upstream 24f9515de877 b4723e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/03/25 01:38 upstream 24f9515de877 b4723e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/03/18 18:18 upstream a989fde763f4 0199f9a1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/03/13 21:07 upstream 0257f64bdac7 351cb5cf .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/03/04 12:12 upstream 0031c06807cf e6b6b96b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/03/03 08:26 upstream af4e9ef3d784 28b83e23 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/02/28 00:54 upstream a75cb869a8cc 2cf092b8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/02/12 09:53 upstream 1e83ccd5921a 76a109e2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/02/09 17:30 upstream 05f7e89ab973 df949cd9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/01/30 21:42 upstream 4d310797262f ea6dba22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/01/19 14:05 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/01/15 12:05 upstream 944aacb68baf d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/01/12 02:04 upstream 9c7ef209cd0f d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2025/12/28 22:41 upstream c875a6c32467 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2025/12/27 14:04 upstream c53f467229a7 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2025/12/21 07:36 upstream d8ba32c5a460 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2025/12/13 14:50 upstream 9551a26f17d9 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2025/11/06 16:02 upstream dc77806cf3b4 4e1406b4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2024/05/20 23:37 upstream 6e51b4b5bbc0 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in shmem_evict_inode
2026/04/29 13:22 net-next 09942ddedcb9 804ea88f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in shmem_evict_inode
* Struck through repros no longer work on HEAD.