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: 1292d, last: 16m
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 26 11h43m 320d 0/3 upstream: reported C repro on 2023/06/08 18:04
linux-6.1 WARNING in drop_nlink origin:upstream C 24 5h14m 317d 0/3 upstream: reported C repro on 2023/06/12 09:27
linux-4.14 WARNING in drop_nlink C 9 415d 756d 0/1 upstream: reported C repro on 2022/03/30 09:01
linux-4.19 WARNING in drop_nlink fat reiserfs C error 25 443d 1294d 0/1 upstream: reported C repro on 2020/10/08 09:54
upstream WARNING in drop_nlink fs C done error 1 1463d 1459d 15/26 fixed on 2020/09/16 22:51
Last patch testing requests (14)
Created Duration User Patch Repo Result
2024/03/23 17:39 18m retest repro upstream error OK
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
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: 5069 at fs/inode.c:332 drop_nlink+0xc4/0x110 fs/inode.c:332
Modules linked in:
CPU: 0 PID: 5069 Comm: syz-executor265 Not tainted 6.9.0-rc4-syzkaller-00266-g977b1ef51866 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:drop_nlink+0xc4/0x110 fs/inode.c:332
Code: bb 70 07 00 00 be 08 00 00 00 e8 a7 ac e7 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 8d 98 86 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:ffffc9000349f8f0 EFLAGS: 00010293
RAX: ffffffff820f67e3 RBX: 1ffff1100f19554f RCX: ffff888023e2da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff820f6763 R09: 1ffff92000693e80
R10: dffffc0000000000 R11: fffff52000693e81 R12: ffff888078caaa78
R13: ffff88807a111ac8 R14: ffff888078caaa30 R15: dffffc0000000000
FS:  000055555d702380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b3a6d5ae28 CR3: 0000000075610000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_unlink+0x3fe/0x790 fs/hfsplus/dir.c:381
 hfsplus_rename+0xc8/0x1c0 fs/hfsplus/dir.c:547
 vfs_rename+0xbdb/0xf00 fs/namei.c:4880
 do_renameat2+0xd94/0x13f0 fs/namei.c:5037
 __do_sys_renameat2 fs/namei.c:5071 [inline]
 __se_sys_renameat2 fs/namei.c:5068 [inline]
 __x64_sys_renameat2+0xd2/0xf0 fs/namei.c:5068
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f06b3781779
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:00007ffc9f3828a8 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 0037656c69662f2e RCX: 00007f06b3781779
RDX: 00000000ffffff9c RSI: 0000000020000b80 RDI: 00000000ffffff9c
RBP: 0036656c69662f2e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000bc0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc9f382a88 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (513):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/21 05:21 upstream 977b1ef51866 af24b050 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
2024/03/31 07:30 upstream fe46a7dd189e 6baf5069 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in drop_nlink
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
2024/04/11 14:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fec50db7033e 478efa7f .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 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
2024/04/24 09:42 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/24 04:18 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/24 03:07 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/24 02:00 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/24 00:21 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/23 23:42 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 22:35 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/23 22:22 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/23 20:53 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 19:51 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/23 18:55 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 17:35 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in drop_nlink
2024/04/23 17:12 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 16:55 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 16:34 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/23 14:49 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/23 14:11 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 14:09 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 04:21 upstream 4d2008430ce8 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/23 02:23 upstream 4d2008430ce8 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/22 20:28 upstream ed30a4a51bb1 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/22 19:03 upstream ed30a4a51bb1 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/22 17:11 upstream ed30a4a51bb1 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/22 16:10 upstream ed30a4a51bb1 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/22 10:25 upstream 48cf398f15fc af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2024/04/22 08:24 upstream ed30a4a51bb1 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/22 06:10 upstream 3b68086599f8 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/22 04:10 upstream 3b68086599f8 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/21 16:08 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/21 15:51 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2024/04/21 12:02 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in drop_nlink
2024/04/21 09:54 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/21 06:04 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/21 02:11 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2024/04/22 14:26 upstream ed30a4a51bb1 36c961ad .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in drop_nlink
2024/04/23 13:04 upstream 71b1543c83d6 21339d7b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in drop_nlink
2024/04/22 18:50 upstream ed30a4a51bb1 36c961ad .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in drop_nlink
2024/04/21 21:03 upstream 3b68086599f8 af24b050 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in drop_nlink
2024/04/21 13:51 upstream 977b1ef51866 af24b050 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in drop_nlink
2024/04/23 12:23 linux-next 7b4f2bc91c15 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2024/04/23 06:13 linux-next 7b4f2bc91c15 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2024/04/23 01:22 linux-next 7b4f2bc91c15 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2024/04/21 19:05 linux-next 7b4f2bc91c15 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2024/04/21 08:44 linux-next 7b4f2bc91c15 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2024/04/24 06:15 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6a71d2909427 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2024/04/23 10:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6a71d2909427 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2024/04/23 08:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6a71d2909427 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2024/04/22 00:14 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6a71d2909427 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in drop_nlink
2024/04/21 01:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6a71d2909427 af24b050 .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.