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WARNING in inc_nlink (3)

Status: upstream: reported C repro on 2022/03/17 16:37
Labels: 9p (incorrect?)
Reported-by: syzbot+2b3af42c0644df1e4da9@syzkaller.appspotmail.com
First crash: 447d, last: 4h57m

Cause bisection: failed (error log, bisect log)

Fix bisection: failed (error log, bisect log)
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[syzbot] Monthly 9p report (May 2023) 0 (1) 2023/05/07 06:35
[syzbot] Monthly 9p report 0 (1) 2023/04/06 08:17
Re: [syzbot] WARNING in inc_nlink (3) 1 (1) 2022/03/18 15:29
[syzbot] WARNING in inc_nlink (3) 0 (1) 2022/03/17 16:37
▶ ▼ Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in inc_nlink (2) C error 102 188d 944d 0/1 upstream: reported C repro on 2020/11/01 15:25
linux-5.15 WARNING in inc_nlink origin:lts-only C 10 20d 75d 0/3 upstream: reported C repro on 2023/03/20 05:26
upstream WARNING in inc_nlink (2) fs C inconclusive done 21 452d 789d 22/24 fixed on 2022/03/08 16:11
linux-6.1 WARNING in inc_nlink 81 32d 54d 0/3 upstream: reported on 2023/04/10 02:26
linux-4.19 WARNING in inc_nlink C done 8 1018d 1167d 1/1 fixed on 2020/09/18 07:23
linux-4.14 WARNING in inc_nlink C done 21 1026d 1168d 1/1 fixed on 2020/09/11 09:49
linux-4.14 WARNING in inc_nlink (2) C 47 104d 939d 0/1 upstream: reported C repro on 2020/11/06 09:55
upstream WARNING in inc_nlink C done 26 1056d 1159d 17/24 fixed on 2020/09/16 22:51
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2022/03/18 15:10 14m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ aad611a868d1 OK
2022/03/18 13:43 22m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ aad611a868d1 error

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3607 at fs/inode.c:388 inc_nlink+0x144/0x160 fs/inode.c:388
Modules linked in:
CPU: 0 PID: 3607 Comm: syz-executor993 Not tainted 6.0.0-rc6-syzkaller-00309-g1a61b828566f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:inc_nlink+0x144/0x160 fs/inode.c:388
Code: ff 4c 89 e7 e8 1d ed ea ff e9 42 ff ff ff 4c 89 e7 e8 a0 ec ea ff e9 fc fe ff ff 4c 89 e7 e8 93 ec ea ff eb d4 e8 3c 4e 9f ff <0f> 0b e9 6e ff ff ff e8 90 ec ea ff e9 44 ff ff ff e8 86 ec ea ff
RSP: 0018:ffffc90003007ca0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88806b47c618 RCX: 0000000000000000
RDX: ffff88807e3a8000 RSI: ffffffff81dbe9e4 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001d R12: ffff88806b47c660
R13: ffff888071b255e0 R14: 1ffff92000600f9c R15: ffff888076e45e00
FS:  0000555555d0f3c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36309766a8 CR3: 000000007bb5a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x5c5/0x900 fs/9p/vfs_inode_dotl.c:444
 vfs_mkdir+0x489/0x740 fs/namei.c:4013
 do_mkdirat+0x28c/0x310 fs/namei.c:4038
 __do_sys_mkdir fs/namei.c:4058 [inline]
 __se_sys_mkdir fs/namei.c:4056 [inline]
 __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4056
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd2f80ab819
Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdcae60a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffdcae60a28 RCX: 00007fd2f80ab819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007ffdcae60a20 R08: 00007fd2f8069ae0 R09: 00007fd2f8069ae0
R10: 0000000020000340 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Crashes (540):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2022/09/25 09:32 upstream 1a61b828566f 0042f2b4 .config strace log report syz C [disk image] [vmlinux] ci-upstream-kasan-gce-selinux-root WARNING in inc_nlink
2022/08/15 08:54 upstream 7ebfc85e2cd7 8dfcaa3d .config strace log report syz C ci-upstream-kasan-gce-selinux-root WARNING in inc_nlink
2022/08/15 07:19 upstream 7ebfc85e2cd7 8dfcaa3d .config strace log report syz C ci-upstream-kasan-gce-selinux-root WARNING in inc_nlink
2022/08/15 06:47 upstream 7ebfc85e2cd7 8dfcaa3d .config strace log report syz C ci-upstream-kasan-gce-selinux-root WARNING in inc_nlink
2022/07/20 15:16 upstream ca85855bdcae 775344bc .config strace log report syz C ci-upstream-kasan-gce-smack-root WARNING in inc_nlink
2022/07/20 14:46 upstream ca85855bdcae 775344bc .config strace log report syz C ci-upstream-kasan-gce-smack-root WARNING in inc_nlink
2022/07/20 14:15 upstream ca85855bdcae 775344bc .config strace log report syz C ci-upstream-kasan-gce-smack-root WARNING in inc_nlink
2022/07/09 14:27 upstream e5524c2a1fc4 b5765a15 .config strace log report syz C ci-upstream-kasan-gce-root WARNING in inc_nlink
2022/06/02 04:39 upstream 8171acb8bc9b b4bc6a3d .config strace log report syz C ci-upstream-kasan-gce-root WARNING in inc_nlink
2022/06/02 04:18 upstream 8171acb8bc9b b4bc6a3d .config strace log report syz C ci-upstream-kasan-gce-root WARNING in inc_nlink
2022/03/13 16:56 upstream aad611a868d1 9e8eaa75 .config console log report syz C ci-qemu-upstream WARNING in inc_nlink
2022/03/13 16:54 upstream aad611a868d1 9e8eaa75 .config console log report syz C ci-upstream-kasan-gce-root WARNING in inc_nlink
2022/07/13 21:59 linux-next cb71b93c2dc3 5d921b08 .config strace log report syz C ci-upstream-linux-next-kasan-gce-root WARNING in inc_nlink
2022/07/13 21:30 linux-next cb71b93c2dc3 5d921b08 .config strace log report syz C ci-upstream-linux-next-kasan-gce-root WARNING in inc_nlink
2022/03/13 17:07 linux-next 91265a6da44d 9e8eaa75 .config console log report syz C ci-upstream-linux-next-kasan-gce-root WARNING in inc_nlink
2023/06/03 11:16 upstream 4ecd704a4c51 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/06/02 13:53 upstream c43a6ff9f93f a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/06/02 11:53 upstream 1874a42a7d74 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/30 17:10 upstream 8b817fded42d df37c7f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/30 01:46 upstream 8b817fded42d cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/29 05:06 upstream e338142b39cf cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in inc_nlink
2023/05/28 12:48 upstream 416839029e38 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/27 22:07 upstream 4e893b5aa4ac cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/22 19:11 upstream 44c026a73be8 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/21 17:44 upstream 0dd2a6fb1e34 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/21 08:16 upstream 0dd2a6fb1e34 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/15 19:39 upstream f1fcbaa18b28 c4d362e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2023/05/02 21:32 upstream 865fdb08197e 52d40fd2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in inc_nlink
2022/09/28 06:08 upstream 46452d3786a8 75c78242 .config console log report info ci-upstream-kasan-gce-root WARNING in inc_nlink
2022/09/23 11:49 upstream bf682942cd26 0042f2b4 .config console log report info [disk image] [vmlinux] ci-upstream-kasan-gce-smack-root WARNING in inc_nlink
2022/09/23 10:39 upstream bf682942cd26 0042f2b4 .config console log report info ci-upstream-kasan-gce-selinux-root WARNING in inc_nlink
2022/09/19 05:51 upstream 38eddeedbbea dd9a85ff .config console log report info ci-qemu-upstream WARNING in inc_nlink
2022/03/13 16:34 upstream aad611a868d1 9e8eaa75 .config console log report info ci-upstream-kasan-gce-root WARNING in inc_nlink
2022/09/28 04:43 upstream 46452d3786a8 75c78242 .config console log report info ci-qemu-upstream-386 WARNING in inc_nlink
2023/05/31 20:15 linux-next 715abedee4cd e2a77acd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in inc_nlink
2023/05/26 10:03 linux-next 715abedee4cd b40ef614 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in inc_nlink
2023/06/03 16:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/27 18:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/10 10:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 14b12a99 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/10 03:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 1964022b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/10 02:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 1964022b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/09 23:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 30aa2a7e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/09 19:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 30aa2a7e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/09 15:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 30aa2a7e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/09 13:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 30aa2a7e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/09 03:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a f4168103 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/08 22:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/08 20:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/08 16:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/08 07:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/07 18:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/07 14:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/07 08:18 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/06 08:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/06 06:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/06 02:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 4cec9341 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/05 20:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 4cec9341 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/05 17:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 4cec9341 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/05 04:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 518a39a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/05 02:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 518a39a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/04 14:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 3a560463 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/04 08:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a b5918830 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/03 16:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a b5918830 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/03 14:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a b5918830 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/02 18:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 48e0a81d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/02 16:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 48e0a81d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/02 12:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/02 07:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/02 03:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/01 22:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/05/01 04:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/04/30 23:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
2023/04/30 16:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in inc_nlink
* Struck through repros no longer work on HEAD.