syzbot


WARNING in drop_nlink

Status: upstream: reported C repro on 2023/06/08 18:04
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+dfeb6a89bfe7b591c73a@syzkaller.appspotmail.com
First crash: 328d, last: 1d02h
Bug presence (1)
Date Name Commit Repro Result
2023/06/08 upstream (ToT) 25041a4c02c7 C [report] WARNING in drop_nlink
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in drop_nlink (2) hfs C done inconclusive 809 54m 1296d 0/26 upstream: reported C repro on 2020/10/13 17:02
linux-6.1 WARNING in drop_nlink origin:upstream C 28 1d21h 325d 0/3 upstream: reported C repro on 2023/06/12 09:27
linux-4.14 WARNING in drop_nlink C 9 423d 764d 0/1 upstream: reported C repro on 2022/03/30 09:01
linux-4.19 WARNING in drop_nlink fat reiserfs C error 25 451d 1302d 0/1 upstream: reported C repro on 2020/10/08 09:54
upstream WARNING in drop_nlink fs C done error 1 1471d 1467d 15/26 fixed on 2020/09/16 22:51
Fix bisection attempts (6)
Created Duration User Patch Repo Result
2024/03/17 15:39 1h04m bisect fix linux-5.15.y job log (0) log
2024/02/14 16:18 2h24m bisect fix linux-5.15.y job log (0) log
2024/01/06 06:47 52m bisect fix linux-5.15.y job log (0) log
2023/12/07 05:27 1h13m bisect fix linux-5.15.y job log (0) log
2023/11/06 23:20 1h50m bisect fix linux-5.15.y job log (0) log
2023/10/04 23:52 1h39m bisect fix linux-5.15.y job log (0) log

Sample crash report:
loop0: detected capacity change from 0 to 1024
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3536 at fs/inode.c:307 drop_nlink+0xbb/0x100
Modules linked in:
CPU: 1 PID: 3536 Comm: syz-executor411 Not tainted 5.15.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:drop_nlink+0xbb/0x100 fs/inode.c:307
Code: 49 8b 1e 48 8d bb c8 07 00 00 be 08 00 00 00 e8 ab b3 ed ff f0 48 ff 83 c8 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 55 57 a4 ff <0f> 0b eb 89 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 62 ff ff ff 4c
RSP: 0018:ffffc90002d4f930 EFLAGS: 00010293
RAX: ffffffff81dba1fb RBX: 1ffff11003a401ef RCX: ffff888024619dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81dba17f R09: fffff520005a9e89
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801d200f78
R13: ffff888075f52928 R14: ffff88801d200f30 R15: dffffc0000000000
FS:  00007faf14253700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200028c4 CR3: 00000000135f8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_unlink+0x3fa/0x7f0 fs/hfsplus/dir.c:381
 hfsplus_rename+0xc4/0x1b0 fs/hfsplus/dir.c:547
 vfs_rename+0xd8f/0x1190 fs/namei.c:4736
 do_renameat2+0xb97/0x13b0 fs/namei.c:4887
 __do_sys_rename fs/namei.c:4933 [inline]
 __se_sys_rename fs/namei.c:4931 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:4931
 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: 0033:0x7faf142a7559
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faf142532f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007faf142a7559
RDX: ffffffffffffffb8 RSI: 00000000200028c0 RDI: 00000000200000c0
RBP: 00007faf1432c788 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007faf1432c780
R13: 0000000020000cc0 R14: 0031656c69662f2e R15: 0073756c70736668
 </TASK>

Crashes (36):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/08 18:04 linux-5.15.y d7af3e5ba454 058b3a5a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/03/31 10:56 linux-5.15.y 9465fef4ae35 6baf5069 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2023/08/07 04:57 linux-5.15.y 38d4ca22a528 4ffcc9ef .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/29 06:58 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/29 05:31 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/29 03:45 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/29 03:45 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/28 15:10 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/28 12:34 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/28 02:32 linux-5.15.y b925f60c6ee7 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/23 22:56 linux-5.15.y c52b9710c83d 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/23 21:37 linux-5.15.y c52b9710c83d 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/23 12:46 linux-5.15.y c52b9710c83d 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/21 11:04 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/20 00:30 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/20 00:13 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/20 00:13 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/20 00:13 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/20 00:13 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/19 03:26 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/16 13:29 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/16 13:29 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/15 09:12 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/15 09:11 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/15 09:09 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/04/15 09:09 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/05/01 13:18 linux-5.15.y b925f60c6ee7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/04/30 09:54 linux-5.15.y b925f60c6ee7 f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/04/25 22:19 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/04/15 05:10 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/04/14 20:23 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/04/13 17:12 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/04/12 01:29 linux-5.15.y cdfd0a7f0139 95ed9ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/04/12 01:18 linux-5.15.y cdfd0a7f0139 95ed9ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/03/31 10:41 linux-5.15.y 9465fef4ae35 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2023/07/15 01:05 linux-5.15.y d54cfc420586 35d9ecc5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
* Struck through repros no longer work on HEAD.