syzbot


WARNING in do_mknodat

Status: closed as invalid on 2023/02/16 16:02
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+3509066790782614b600@syzkaller.appspotmail.com
First crash: 522d, last: 522d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] WARNING in do_mknodat 1 (2) 2023/02/16 16:02
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in do_mknodat (3) fs 46 4d18h 88d 0/26 moderation: reported on 2024/03/01 11:23
linux-6.1 WARNING in do_mknodat 1 208d 208d 0/3 auto-obsoleted due to no activity on 2024/02/10 13:02
upstream WARNING in do_mknodat (2) fs 11 192d 460d 0/26 auto-obsoleted due to no activity on 2024/02/16 05:28
linux-6.1 WARNING in do_mknodat (2) 18 4d10h 42d 0/3 upstream: reported on 2024/04/15 19:44
linux-5.15 WARNING in do_mknodat (2) 3 16d 174d 0/3 upstream: reported on 2023/12/06 15:13
linux-5.15 WARNING in do_mknodat 1 285d 285d 0/3 auto-obsoleted due to no activity on 2023/11/25 05:54

Sample crash report:
WARNING: CPU: 1 PID: 8065 at kernel/locking/rwsem.c:1361 __up_write kernel/locking/rwsem.c:1360 [inline]
WARNING: CPU: 1 PID: 8065 at kernel/locking/rwsem.c:1361 up_write+0x4f9/0x580 kernel/locking/rwsem.c:1615
Modules linked in:
CPU: 1 PID: 8065 Comm: syz-executor.1 Not tainted 6.1.0-syzkaller-14321-g0a924817d2ed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__up_write kernel/locking/rwsem.c:1360 [inline]
RIP: 0010:up_write+0x4f9/0x580 kernel/locking/rwsem.c:1615
Code: c7 00 ac ed 8a 48 c7 c6 a0 ae ed 8a 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 31 c0 53 e8 9b 59 e8 ff 48 83 c4 08 <0f> 0b e9 6b fd ff ff 48 c7 c1 98 8a 96 8e 80 e1 07 80 c1 03 38 c1
RSP: 0000:ffffc90016557d20 EFLAGS: 00010292
RAX: 4e2f149d5ad82600 RBX: ffffffff8aedace0 RCX: 0000000000040000
RDX: ffffc9000b6bc000 RSI: 000000000001920b RDI: 000000000001920c
RBP: ffffc90016557df0 R08: ffffffff816f2c9d R09: fffff52002caaf5d
R10: fffff52002caaf5d R11: 1ffff92002caaf5c R12: 0000000000000000
R13: ffff88807799b6d0 R14: 1ffff92002caafac R15: dffffc0000000000
FS:  00007f84df1f6700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff06e74d68 CR3: 0000000021050000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:761 [inline]
 done_path_create fs/namei.c:3857 [inline]
 do_mknodat+0x4e1/0x740 fs/namei.c:3980
 __do_sys_mknod fs/namei.c:3998 [inline]
 __se_sys_mknod fs/namei.c:3996 [inline]
 __x64_sys_mknod+0x8a/0xa0 fs/namei.c:3996
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f84de48c0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f84df1f6168 EFLAGS: 00000246
 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f84de5ac050 RCX: 00007f84de48c0a9
RDX: 0000000000000702 RSI: 00000000ffffc000 RDI: 00000000200001c0
RBP: 00007f84de4e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc94aa0aef R14: 00007f84df1f6300 R15: 0000000000022000
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/12/22 18:15 upstream 0a924817d2ed 9da18ae8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
* Struck through repros no longer work on HEAD.