syzbot


WARNING in drop_nlink (2)

Status: upstream: reported C repro on 2020/10/13 17:02
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+651ca866e5e2b4b5095b@syzkaller.appspotmail.com
First crash: 1256d, last: 9d18h
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config
  
Fix bisection the fix commit could be any of (bisect log):
  583090b1b823 Merge tag 'block5.9-2020-10-08' of git://git.kernel.dk/linux-block
  9e9fb7655ed5 Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
  
Discussions (3)
Title Replies (including bot) Last reply
[syzbot] Monthly exfat report (Nov 2023) 2 (3) 2023/11/29 15:48
[PATCH] fs:minix: catch inode->i_nlink == 0 in minix_rename() 1 (1) 2021/04/25 07:48
WARNING in drop_nlink (2) 0 (1) 2020/10/13 17:02
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in drop_nlink origin:upstream C 3 1d18h 284d 0/3 upstream: reported C repro on 2023/06/08 18:04
linux-6.1 WARNING in drop_nlink origin:upstream C 3 8d03h 281d 0/3 upstream: reported C repro on 2023/06/12 09:27
linux-4.14 WARNING in drop_nlink C 9 379d 720d 0/1 upstream: reported C repro on 2022/03/30 09:01
linux-4.19 WARNING in drop_nlink fat reiserfs C error 25 407d 1258d 0/1 upstream: reported C repro on 2020/10/08 09:54
upstream WARNING in drop_nlink fs C done error 1 1427d 1423d 15/26 fixed on 2020/09/16 22:51
Last patch testing requests (14)
Created Duration User Patch Repo Result
2024/02/19 20:36 41m retest repro upstream OK log
2024/02/19 20:36 19m retest repro upstream OK log
2024/02/19 20:36 20m retest repro upstream OK log
2024/02/19 20:36 19m retest repro upstream OK log
2024/02/19 20:36 19m retest repro upstream OK log
2024/01/14 03:19 23m retest repro linux-next OK log
2024/01/14 03:19 24m retest repro linux-next OK log
2024/01/14 03:19 20m retest repro upstream OK log
2024/01/13 19:24 32m retest repro upstream OK log
2024/01/13 19:24 31m retest repro upstream OK log
2021/04/22 05:18 12m ducheng2@gmail.com patch linux-next report log
2021/04/22 03:42 11m ducheng2@gmail.com patch upstream report log
2021/04/22 03:17 11m ducheng2@gmail.com patch upstream report log
2021/04/20 03:10 22m ducheng2@gmail.com upstream report log
Fix bisection attempts (11)
Created Duration User Patch Repo Result
2021/09/01 14:37 26m bisect fix upstream job log (2)
2021/08/02 06:13 19m bisect fix upstream job log (0) log
2021/07/02 00:41 22m bisect fix upstream job log (0) log
2021/06/01 09:45 22m bisect fix upstream job log (0) log
2021/05/02 09:14 20m bisect fix upstream job log (0) log
2021/04/02 03:21 19m bisect fix upstream job log (0) log
2021/03/01 15:54 21m bisect fix upstream job log (0) log
2021/02/14 23:16 0m bisect fix upstream error job log (0)
2021/01/15 22:59 16m bisect fix upstream job log (0) log
2020/12/16 08:29 16m bisect fix upstream job log (0) log
2020/11/08 22:54 15m bisect fix upstream job log (0) log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5061 at fs/inode.c:331 drop_nlink+0xc4/0x110 fs/inode.c:331
Modules linked in:
CPU: 0 PID: 5061 Comm: syz-executor419 Not tainted 6.8.0-rc7-syzkaller-00229-g10d48d70e82d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:drop_nlink+0xc4/0x110 fs/inode.c:331
Code: bb 48 07 00 00 be 08 00 00 00 e8 a7 ad e7 ff f0 48 ff 83 48 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 2d d9 88 ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff
RSP: 0018:ffffc9000414f970 EFLAGS: 00010293
RAX: ffffffff820a94d3 RBX: 1ffff1100f83b956 RCX: ffff88807ccc0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff820a9453 R09: 1ffffffff258b09d
R10: dffffc0000000000 R11: fffffbfff258b09e R12: ffff88807c1dcab0
R13: dffffc0000000000 R14: ffff88807c1dca68 R15: dffffc0000000000
FS:  00005555571bb380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb31d7f2304 CR3: 00000000291cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_dec_link_count include/linux/fs.h:2418 [inline]
 bfs_rename+0x432/0x4f0 fs/bfs/dir.c:247
 vfs_rename+0xbdb/0xf00 fs/namei.c:4883
 do_renameat2+0xd94/0x13f0 fs/namei.c:5040
 __do_sys_rename fs/namei.c:5087 [inline]
 __se_sys_rename fs/namei.c:5085 [inline]
 __x64_sys_rename+0x86/0xa0 fs/namei.c:5085
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f62d2a8dbb9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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:00007ffd8f642238 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f62d2a8dbb9
RDX: 00007f62d2a8cf37 RSI: 0000000020000180 RDI: 0000000020000140
RBP: 0031656c69662f2e R08: 0000000020000000 R09: 0000000000000000
R10: 00007ffd8f642100 R11: 0000000000000246 R12: 00007f62d2ad604b
R13: 00007ffd8f642418 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (122):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/09 16:08 upstream 10d48d70e82d 6ee49f2e .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2022/11/29 20:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6d464646530f 05dc7993 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/11/15 03:04 upstream 9bacdd8996c7 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root WARNING in drop_nlink
2023/09/30 20:55 upstream 9f3ebbef746f 8e26a358 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root WARNING in drop_nlink
2023/08/16 07:31 upstream 2d7b8c6b90e4 39990d51 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2023/07/25 19:03 upstream 0b5547c51827 6756545c .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in drop_nlink
2023/06/21 18:43 upstream e660abd551f1 09ffe269 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in drop_nlink
2023/06/21 02:24 upstream 99ec1ed7c2ed 79782afc .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2023/06/20 19:52 upstream 692b7dc87ca6 09ffe269 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2023/06/20 03:21 upstream 45a3e24f65e9 d521bc56 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root WARNING in drop_nlink
2023/05/12 19:47 upstream cc3c44c9fda2 ecca8a24 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2022/12/28 10:10 upstream 1b929c02afd3 44712fbc .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2022/12/19 08:37 upstream f9ff5644bcc0 05494336 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in drop_nlink
2022/11/30 16:10 upstream 01f856ae6d0c 4c2a66e8 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2022/11/11 18:08 upstream 4bbf3422df78 3ead01ad .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in drop_nlink
2022/11/10 10:58 upstream f67dd6ce0723 b2488a87 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2022/11/01 16:28 upstream b229b6ca5abb a1d8560a .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2022/06/25 07:11 upstream cbe232ab07ab a371c43c .config console log report syz C ci-qemu-upstream WARNING in drop_nlink
2023/09/01 13:42 linux-next a47fc304d2b6 696ea0d2 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2023/07/31 21:50 linux-next ec8939156379 2a0d0f29 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2023/03/05 18:53 linux-next 1acf39ef8f14 f8902b57 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2020/10/09 16:56 upstream 583090b1b823 d81b165e .config console log report syz C ci-upstream-kasan-gce-smack-root
2024/03/09 15:37 upstream 10d48d70e82d 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/11/27 18:11 upstream 2cc14f52aeb7 7ec6c044 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/11/23 19:00 upstream 9b6de136b5f0 fc59b78e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2023/11/15 02:34 upstream 9bacdd8996c7 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2023/11/12 10:41 upstream 1b907d050735 6d6dbf8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/11/09 03:29 upstream 6bc986ab839c 4862372a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/10/20 17:23 upstream ce55c22ec8b2 361b23dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/10/14 19:33 upstream 70f8c6f8f880 f757a323 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/10/10 10:01 upstream 94f6f0550c62 c9be5398 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/09/07 02:21 upstream 744a759492b5 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/12/16 15:07 upstream c8e97fc6b4c0 3222d10c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in drop_nlink
2023/08/25 17:15 upstream 4f9e7fabf864 03d9c195 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/08/14 08:30 upstream 2ccdd1b13c59 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/08/14 01:48 upstream 2ccdd1b13c59 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/08/13 21:15 upstream a785fd28d31f 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/08/12 03:02 upstream 9106536c1aa3 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/07/23 01:09 upstream 295e1388de2d 27cbe77f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/07/17 06:36 upstream 20edcec23f92 35d9ecc5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/07/04 23:05 upstream 24be4d0b46bb f99c2404 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/23 00:06 upstream dad9774deaf1 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/21 20:15 upstream e660abd551f1 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/17 16:53 upstream 1639fae5132b f3921d4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/16 21:47 upstream 40f71e7cd3c6 f3921d4d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drop_nlink
2023/06/14 20:12 upstream b6dad5178cea d2ee9228 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/12 05:49 upstream 4c605260bc60 49519f06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/11 19:40 upstream 4c605260bc60 49519f06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/10 15:00 upstream 64569520920a 49519f06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/07 12:05 upstream a4d7d7011219 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/06 01:57 upstream f8dba31b0a82 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/05 00:28 upstream 9561de3a55be a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/03 19:37 upstream 51f269a6ecc7 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/02 09:59 upstream 1874a42a7d74 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/22 21:51 upstream dad9774deaf1 79782afc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in drop_nlink
2023/09/28 10:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf6547d8715b c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/28 05:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf6547d8715b 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/27 17:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf6547d8715b 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/27 11:40 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf6547d8715b 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/26 19:02 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf6547d8715b 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/25 20:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf6547d8715b 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/25 19:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf6547d8715b 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/25 16:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe4469582053 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/25 15:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe4469582053 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/25 07:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe4469582053 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/23 23:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe4469582053 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/09/23 21:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe4469582053 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2023/07/04 14:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e40939bbfc68 6e553898 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
* Struck through repros no longer work on HEAD.