syzbot


kernel BUG in clear_inode (3)

Status: upstream: reported C repro on 2025/06/12 11:53
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+6e516bb515d93230bc7b@syzkaller.appspotmail.com
Fix commit: 2d91b3765cd0 jfs: truncate good inode pages when hard link is 0
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-riscv64 ci-upstream-gce-arm64 ci-upstream-kasan-gce-smack-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-usb]
First crash: 51d, last: 1d19h
Cause bisection: failed (error log, bisect log)
  
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] jfs: truncate good inode pages when hard link is 0 2 (2) 2025/07/11 20:18
[syzbot] [jfs?] kernel BUG in clear_inode (3) 0 (1) 2025/06/12 11:53
Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in clear_inode (2) jfs -1 C inconclusive 986 53d 278d 28/29 fixed on 2025/06/10 16:19
linux-6.1 kernel BUG in clear_inode origin:upstream missing-backport -1 C inconclusive 27 5d09h 799d 0/3 upstream: reported C repro on 2023/05/25 23:24
linux-6.6 kernel BUG in clear_inode origin:upstream -1 C 5 13d 45d 0/2 upstream: reported C repro on 2025/06/18 00:00
linux-5.15 kernel BUG in clear_inode (3) missing-backport origin:upstream -1 C done 24 5d09h 253d 0/3 upstream: reported C repro on 2024/11/22 00:29
linux-5.15 kernel BUG in clear_inode -1 1 824d 824d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:07
linux-5.15 kernel BUG in clear_inode (2) -1 2 379d 458d 0/3 auto-obsoleted due to no activity on 2024/10/27 05:50
upstream kernel BUG in clear_inode btrfs -1 C 12 286d 428d 28/29 fixed on 2024/10/22 11:57
upstream kernel BUG at fs/inode.c:LINE! (2) fs -1 C done unreliable 322 452d 1800d 25/29 fixed on 2024/05/21 07:00
Cause bisection attempts (2)
Created Duration User Patch Repo Result
2025/06/19 18:27 8h35m bisect upstream error job log
2025/06/12 10:07 7h55m bisect upstream error job log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/inode.c:753!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5829 Comm: syz-executor199 Not tainted 6.16.0-rc1-syzkaller-00005-g488ef3560196 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:clear_inode+0x169/0x190 fs/inode.c:753
Code: 4c 89 f7 e8 59 20 e8 ff e9 60 ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 7c c0 4c 89 f7 e8 2f 21 e8 ff eb b6 e8 b8 d3 86 ff 90 <0f> 0b e8 b0 d3 86 ff 90 0f 0b e8 a8 d3 86 ff 90 0f 0b e8 a0 d3 86
RSP: 0018:ffffc900043bf870 EFLAGS: 00010093
RAX: ffffffff82397a38 RBX: ffff88807e1cb248 RCX: ffff888034aeda00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000877eec R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88807e1cb470 R15: 0000000000000001
FS:  0000555556cc1380(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556cca6f8 CR3: 0000000077920000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_evict_inode+0xb1/0x440 fs/jfs/inode.c:166
 evict+0x501/0x9c0 fs/inode.c:810
 __dentry_kill+0x209/0x660 fs/dcache.c:669
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1114
 shrink_dentry_list+0x2e0/0x5e0 fs/dcache.c:1141
 shrink_dcache_parent+0xa1/0x2c0 fs/dcache.c:-1
 do_one_tree+0x23/0xe0 fs/dcache.c:1604
 shrink_dcache_for_umount+0xa0/0x170 fs/dcache.c:1621
 generic_shutdown_super+0x67/0x2c0 fs/super.c:621
 kill_block_super+0x44/0x90 fs/super.c:1753
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 ptrace_notify+0x281/0x2c0 kernel/signal.c:2520
 ptrace_report_syscall include/linux/ptrace.h:415 [inline]
 ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
 syscall_exit_work+0xc6/0x1d0 kernel/entry/common.c:173
 syscall_exit_to_user_mode_work include/linux/entry-common.h:412 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x2ad/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f724b14c587
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffffbe47da8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000014e57 RCX: 00007f724b14c587
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffffbe47e60
RBP: 00007ffffbe47e60 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffffbe48ed0
R13: 0000555556cc26c0 R14: 431bde82d7b634db R15: 00007ffffbe48ef0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:clear_inode+0x169/0x190 fs/inode.c:753
Code: 4c 89 f7 e8 59 20 e8 ff e9 60 ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 7c c0 4c 89 f7 e8 2f 21 e8 ff eb b6 e8 b8 d3 86 ff 90 <0f> 0b e8 b0 d3 86 ff 90 0f 0b e8 a8 d3 86 ff 90 0f 0b e8 a0 d3 86
RSP: 0018:ffffc900043bf870 EFLAGS: 00010093
RAX: ffffffff82397a38 RBX: ffff88807e1cb248 RCX: ffff888034aeda00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000877eec R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88807e1cb470 R15: 0000000000000001
FS:  0000555556cc1380(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556cca6f8 CR3: 0000000077920000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (634):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/12 08:25 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in clear_inode
2025/06/12 07:00 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in clear_inode
2025/06/12 05:21 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in clear_inode
2025/06/12 02:59 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in clear_inode
2025/08/01 02:07 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/08/01 02:02 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/08/01 00:53 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 23:34 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 22:17 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 20:45 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 19:23 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 16:27 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 13:00 upstream 260f6f4fda93 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 09:29 upstream e8d780dcd957 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 02:50 upstream e8d780dcd957 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/31 01:38 upstream e8d780dcd957 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 23:41 upstream e8d780dcd957 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 21:05 upstream 4b290aae788e f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 21:04 upstream 4b290aae788e f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 19:43 upstream 4b290aae788e f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 15:30 upstream 4b290aae788e f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 13:33 upstream 4b290aae788e f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 10:15 upstream 4b290aae788e f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 08:49 upstream 0919a5b3b11c f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 07:12 upstream 0919a5b3b11c f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 04:22 upstream 0919a5b3b11c f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/30 02:21 upstream 0919a5b3b11c f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 22:57 upstream 0919a5b3b11c f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 20:42 upstream 0919a5b3b11c f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 20:42 upstream 0919a5b3b11c f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 19:08 upstream ae388edd4a8f c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 14:28 upstream ae388edd4a8f c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 11:52 upstream ae388edd4a8f c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 07:40 upstream ae388edd4a8f c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 04:32 upstream ae388edd4a8f 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 04:32 upstream ae388edd4a8f 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 02:42 upstream 038d61fd6422 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/29 00:00 upstream 038d61fd6422 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 22:29 upstream 038d61fd6422 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 20:28 upstream 038d61fd6422 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 18:32 upstream 038d61fd6422 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 14:25 upstream 038d61fd6422 6654ea9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 14:24 upstream 038d61fd6422 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in clear_inode
2025/07/28 13:18 upstream 038d61fd6422 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in clear_inode
2025/07/28 11:25 upstream 038d61fd6422 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 06:51 upstream b711733e89a3 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 03:33 upstream b711733e89a3 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/28 01:47 upstream b711733e89a3 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in clear_inode
2025/07/16 13:40 upstream 155a3c003e55 124ec9cc .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in clear_inode
2025/07/11 19:13 linux-next a62b7a37e6fc 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in clear_inode
2025/07/15 03:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in clear_inode
* Struck through repros no longer work on HEAD.