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WARNING in drop_nlink (2)

Status: upstream: reported C repro on 2020/10/13 17:02
Reported-by: syzbot+651ca866e5e2b4b5095b@syzkaller.appspotmail.com
First crash: 968d, last: 4h00m

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 (2)
Title Replies (including bot) Last reply
[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 (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in drop_nlink C 9 91d 431d 0/1 upstream: reported C repro on 2022/03/30 09:01
linux-4.19 WARNING in drop_nlink fat reiserfs C error 25 119d 969d 0/1 upstream: reported C repro on 2020/10/08 09:54
upstream WARNING in drop_nlink fs C done error 1 1138d 1134d 17/24 fixed on 2020/09/16 22:51
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2022/10/03 07:30 26m retest repro upstream report 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

Sample crash report:
loop0: detected capacity change from 0 to 1024
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5173 at fs/inode.c:331 drop_nlink+0xbf/0x100
Modules linked in:
CPU: 0 PID: 5173 Comm: syz-executor391 Not tainted 6.4.0-rc1-syzkaller-00109-gcc3c44c9fda2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:drop_nlink+0xbf/0x100 fs/inode.c:331
Code: 49 8b 1e 48 8d bb c0 07 00 00 be 08 00 00 00 e8 77 38 e9 ff f0 48 ff 83 c0 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 a1 68 91 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:ffffc90003eef950 EFLAGS: 00010293
RAX: ffffffff81f9fe9f RBX: 1ffff1100ebbf39f RCX: ffff8880207f0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81f9fe23 R09: fffff520007dde8d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888075df9cf8
R13: ffff88807f0547b0 R14: ffff888075df9cb0 R15: dffffc0000000000
FS:  00007f15b4142700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200028c4 CR3: 0000000015f9f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_unlink+0x3fe/0x7f0 fs/hfsplus/dir.c:381
 hfsplus_rename+0xc8/0x1c0 fs/hfsplus/dir.c:547
 vfs_rename+0xb1b/0xfa0 fs/namei.c:4849
 do_renameat2+0xd78/0x1660 fs/namei.c:5002
 __do_sys_rename fs/namei.c:5048 [inline]
 __se_sys_rename fs/namei.c:5046 [inline]
 __x64_sys_rename+0x86/0x90 fs/namei.c:5046
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f15b4196539
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:00007f15b41422f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 000000000000000d RCX: 00007f15b4196539
RDX: ffffffffffffffb8 RSI: 00000000200028c0 RDI: 00000000200000c0
RBP: 00007f15b421b788 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f15b421b780
R13: 0000000020000cc0 R14: 0031656c69662f2e R15: 0073756c70736668
 </TASK>

Crashes (64):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
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
2023/03/05 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
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
2020/10/09 16:56 upstream 583090b1b823 d81b165e .config console log report syz C ci-upstream-kasan-gce-smack-root
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
2023/06/01 18:54 upstream 929ed21dfdb6 babc4389 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/06/01 06:01 upstream 48b1320a674e babc4389 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/05/31 23:28 upstream 48b1320a674e babc4389 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/05/27 19:36 upstream 49572d536129 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/05/20 21:28 upstream d635f6cc934b 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/05/19 16:01 upstream 2d1bcbc6cd70 3bb7af1d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2023/05/17 11:34 upstream f1fcbaa18b28 eaac4681 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/05/17 04:07 upstream f1fcbaa18b28 11c89444 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/05/11 14:09 upstream d295b66a7b66 0fbd49f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/05/02 14:49 upstream 865fdb08197e 52d40fd2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/21 03:45 upstream 6a66fdd29ea1 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/18 05:09 upstream 6a8f57ae2eb0 436577a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/13 04:16 upstream 0bcc40255504 82d5e53e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/12 12:47 upstream e62252bc55b6 1a1596b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/11 21:02 upstream e62252bc55b6 49faf98d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/10 16:26 upstream 09a9639e56c0 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/04 18:20 upstream 148341f0a2f5 928dd177 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/03/06 08:18 upstream f915322fe014 f8902b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in drop_nlink
2023/03/06 08:09 upstream f915322fe014 f8902b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in drop_nlink
2023/02/11 12:16 upstream 420b2d431d18 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/02/09 16:16 upstream 0983f6bf2bfc 07980f9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/02/08 09:25 upstream 513c1a3d3f19 15c3d445 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/02/01 05:55 upstream c0b67534c95c b68fb8d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/31 06:17 upstream 6d796c50f84c b68fb8d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/29 04:36 upstream c96618275234 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/28 18:39 upstream 5af6ce704936 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/28 12:17 upstream 5af6ce704936 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/27 22:58 upstream 83abd4d4c4be 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/26 18:01 upstream 7c46948a6e9c 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/22 12:44 upstream 2241ab53cbb5 cc0f9968 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/20 20:22 upstream d368967cb103 dd15ff29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/15 21:42 upstream 7c6984405241 a63719e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/15 20:07 upstream 7c6984405241 a63719e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/12 14:09 upstream e8f60cd7db24 96166539 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/09 11:20 upstream 1fe4fd6f5cad 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/08 16:57 upstream 9b43a525db12 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/06 18:55 upstream 1f5abbd77e2c 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/04 07:57 upstream 69b41ac87e4a 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/01/02 20:37 upstream 88603b6dc419 ab32d508 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2022/12/29 18:29 upstream 1b929c02afd3 44712fbc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2022/12/27 15:30 upstream 1b929c02afd3 44712fbc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2022/12/19 01:10 upstream f9ff5644bcc0 05494336 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in drop_nlink
2022/11/30 17:33 upstream 01f856ae6d0c 4c2a66e8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in drop_nlink
2023/04/16 20:18 upstream 3e7bb4f24617 ec410564 .config console log report info ci-qemu-upstream-386 WARNING in drop_nlink
2022/12/23 10:02 upstream 8395ae05cb5a 9da18ae8 .config console log report info ci-qemu-upstream-386 WARNING in drop_nlink
2023/05/14 15:51 linux-next e922ba281a8d 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2023/04/16 17:12 linux-next d3f2cd248191 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
2023/04/06 05:17 linux-next 8417c8f5007b 8b834965 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in drop_nlink
* Struck through repros no longer work on HEAD.