syzbot


WARNING in notify_change

Status: upstream: reported C repro on 2023/12/12 19:33
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+96a7fa5abd0a78c6e89f@syzkaller.appspotmail.com
First crash: 191d, last: 76d
Bug presence (2)
Date Name Commit Repro Result
2023/12/12 linux-5.15.y (ToT) 8a1d809b0545 C [report] WARNING in notify_change
2023/12/12 upstream (ToT) cf52eed70e55 C Didn't crash
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in notify_change C done 14 1827d 1892d 1/1 fixed on 2019/11/30 21:02
upstream WARNING in notify_change (5) fs 15 2d03h 73d 0/27 moderation: reported on 2024/04/09 09:55
upstream WARNING in notify_change (4) fs 1 243d 239d 0/27 auto-obsoleted due to no activity on 2024/01/19 20:10
upstream WARNING in notify_change (3) fs 2 421d 427d 0/27 auto-obsoleted due to no activity on 2023/07/26 12:25
linux-6.1 WARNING in notify_change 5 4d04h 72d 0/3 upstream: reported on 2024/04/09 23:34
upstream WARNING in notify_change (2) fuse C unreliable 2 576d 577d 22/27 fixed on 2023/02/24 13:50
linux-4.19 WARNING in notify_change C done 12 1826d 1883d 1/1 fixed on 2019/12/01 09:13
upstream WARNING in notify_change fs C 566 1875d 2265d 12/27 fixed on 2019/07/24 12:46
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/12/24 11:35 6h48m fix candidate upstream job log (1)

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4014 at fs/attr.c:398 notify_change+0xcf0/0xf50
Modules linked in:
CPU: 1 PID: 4014 Comm: syz-executor238 Not tainted 5.15.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:notify_change+0xcf0/0xf50 fs/attr.c:398
Code: ee e8 84 c9 f2 01 48 89 ef 89 de e8 2a 0e f3 01 45 31 f6 44 89 f0 48 83 c4 60 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 e0 2b a3 ff <0f> 0b e9 d7 f3 ff ff 44 89 f1 80 e1 07 fe c1 38 c1 0f 8c 5a f3 ff
RSP: 0018:ffffc900050b7c08 EFLAGS: 00010293
RAX: ffffffff81dcf9f0 RBX: 0000000000000000 RCX: ffff88801d8abb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900050b7d60 R08: ffffffff81dcedc0 R09: ffffed100c7b96db
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffffff8c7ccac0 R14: ffff888063dcb5f0 R15: ffff8880727182f0
FS:  00007f1e9a3786c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e92178e00 CR3: 000000001bfeb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 chown_common+0x592/0x890 fs/open.c:680
 do_fchownat+0x169/0x240 fs/open.c:711
 __do_sys_lchown fs/open.c:736 [inline]
 __se_sys_lchown fs/open.c:734 [inline]
 __x64_sys_lchown+0x81/0x90 fs/open.c:734
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f1e9a3eaaf9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 1f 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1e9a378218 EFLAGS: 00000246
 ORIG_RAX: 000000000000005e
RAX: ffffffffffffffda RBX: 00007f1e9a4914b8 RCX: 00007f1e9a3eaaf9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f1e9a4914b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1e9a4914bc
R13: 00007f1e9a456f24 R14: 00007f1e9a4377e0 R15: 0032656c69662f2e
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/12 22:52 linux-5.15.y 8a1d809b0545 ebcad15c .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in notify_change
2024/04/05 20:38 linux-5.15.y 9465fef4ae35 77230c29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in notify_change
2023/12/12 19:33 linux-5.15.y 8a1d809b0545 ebcad15c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in notify_change
* Struck through repros no longer work on HEAD.