syzbot


WARNING in do_mknodat (2)

Status: auto-obsoleted due to no activity on 2024/02/16 05:28
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+425ea1b4fb977d479731@syzkaller.appspotmail.com
First crash: 421d, last: 149d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in do_mknodat fs 1 479d 424d 0/26 closed as invalid on 2023/02/16 16:02
upstream WARNING in do_mknodat (3) fs 2 2d03h 45d 0/26 moderation: reported on 2024/03/01 11:23
linux-6.1 WARNING in do_mknodat 1 165d 165d 0/3 auto-obsoleted due to no activity on 2024/02/10 13:02
linux-5.15 WARNING in do_mknodat (2) 2 51d 130d 0/3 upstream: reported on 2023/12/06 15:13
linux-5.15 WARNING in do_mknodat 1 242d 242d 0/3 auto-obsoleted due to no activity on 2023/11/25 05:54

Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88802f55ea70, owner = 0x0, curr 0xffff8880282e0000, list empty
WARNING: CPU: 0 PID: 8368 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 8368 at kernel/locking/rwsem.c:1370 up_write+0x4fc/0x580 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 0 PID: 8368 Comm: syz-executor.3 Not tainted 6.7.0-rc1-syzkaller-00213-g791c8ab095f7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x4fc/0x580 kernel/locking/rwsem.c:1632
Code: c7 c7 40 a3 6a 8b 48 c7 c6 80 a5 6a 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 b9 df e7 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6b fd ff ff 48 c7 c1 40 f3 00 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc900153b7d40 EFLAGS: 00010292
RAX: d9bd8293b5d80700 RBX: ffffffff8b6aa420 RCX: 0000000000040000
RDX: ffffc9000a619000 RSI: 000000000002499d RDI: 000000000002499e
RBP: ffffc900153b7e10 R08: ffffffff81545a92 R09: 1ffff92002a76efc
R10: dffffc0000000000 R11: fffff52002a76efd R12: 0000000000000000
R13: ffff88802f55ea70 R14: 1ffff92002a76fb0 R15: dffffc0000000000
FS:  00007f0551f5d6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 0000000020b60000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:807 [inline]
 done_path_create fs/namei.c:3926 [inline]
 do_mknodat+0x4c5/0x5b0 fs/namei.c:4049
 __do_sys_mknodat fs/namei.c:4062 [inline]
 __se_sys_mknodat fs/namei.c:4059 [inline]
 __x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4059
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f055127cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0551f5d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f055139c050 RCX: 00007f055127cae9
RDX: 0000000000006000 RSI: 0000000020000340 RDI: 0000000000000004
RBP: 00007f05512c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000706 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f055139c050 R15: 00007ffd22d86ae8
 </TASK>

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/18 05:27 upstream 791c8ab095f7 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/11/03 07:54 upstream 4652b8e4f3ff c4ac074c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/10/28 14:09 upstream 56567a20b22b 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in do_mknodat
2023/10/20 03:11 upstream dd72f9c7e512 42e1d524 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in do_mknodat
2023/09/26 17:58 upstream 50768a425b46 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/07/30 04:14 upstream 12214540ad87 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/07/22 22:17 upstream 295e1388de2d 27cbe77f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/04/25 05:03 upstream 1a0beef98b58 65320f8e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/02/18 20:23 upstream 38f8ccde04a3 d02e9a70 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/11/01 17:46 linux-next fa7d0c172786 69904c9f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in do_mknodat
2023/10/29 09:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8de1e7afcc1c 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in do_mknodat
* Struck through repros no longer work on HEAD.