syzbot


WARNING in do_mknodat (2)

Status: upstream: reported on 2023/12/06 15:13
Reported-by: syzbot+a1e8e01ac6964d7f0bb9@syzkaller.appspotmail.com
First crash: 165d, last: 7d04h
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in do_mknodat fs 1 514d 458d 0/26 closed as invalid on 2023/02/16 16:02
upstream WARNING in do_mknodat (3) fs 31 7h32m 79d 0/26 moderation: reported on 2024/03/01 11:23
linux-6.1 WARNING in do_mknodat 1 199d 199d 0/3 auto-obsoleted due to no activity on 2024/02/10 13:02
upstream WARNING in do_mknodat (2) fs 11 183d 451d 0/26 auto-obsoleted due to no activity on 2024/02/16 05:28
linux-6.1 WARNING in do_mknodat (2) 15 4h48m 33d 0/3 upstream: reported on 2024/04/15 19:44
linux-5.15 WARNING in do_mknodat 1 276d 276d 0/3 auto-obsoleted due to no activity on 2023/11/25 05:54

Sample crash report:
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff8880847171d0, owner = 0x0, curr 0xffff88803f600000, list empty
WARNING: CPU: 1 PID: 11537 at kernel/locking/rwsem.c:1342 __up_write kernel/locking/rwsem.c:1341 [inline]
WARNING: CPU: 1 PID: 11537 at kernel/locking/rwsem.c:1342 up_write+0x473/0x4d0 kernel/locking/rwsem.c:1594
Modules linked in:
CPU: 1 PID: 11537 Comm: syz-executor.0 Not tainted 5.15.149-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1341 [inline]
RIP: 0010:up_write+0x473/0x4d0 kernel/locking/rwsem.c:1594
Code: 48 c7 c7 80 08 8b 8a 48 c7 c6 40 0b 8b 8a 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 41 11 ea ff 48 83 c4 08 <0f> 0b e9 86 fd ff ff 48 c7 c1 c8 ed e3 8d 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000511fd20 EFLAGS: 00010292
RAX: 4a39d9c2c89d4e00 RBX: ffffffff8a8b0960 RCX: 0000000000040000
RDX: ffffc900040f0000 RSI: 0000000000019f31 RDI: 0000000000019f32
RBP: ffffc9000511fdf0 R08: ffffffff8166625c R09: ffffed1017364f24
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880847171d0 R14: 1ffff92000a23fac R15: dffffc0000000000
FS:  00007fba03b936c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0203d1c80 CR3: 000000007e3b1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:792 [inline]
 done_path_create fs/namei.c:3886 [inline]
 do_mknodat+0x473/0x690 fs/namei.c:4009
 __do_sys_mknodat fs/namei.c:4022 [inline]
 __se_sys_mknodat fs/namei.c:4019 [inline]
 __x64_sys_mknodat+0xa5/0xc0 fs/namei.c:4019
 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+0x61/0xcb
RIP: 0033:0x7fba05633da9
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:00007fba03b930c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007fba05762050 RCX: 00007fba05633da9
RDX: 0000000000001000 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007fba0568047a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fba05762050 R15: 00007ffe56a7f228
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/23 23:49 linux-5.15.y 458ce51d0356 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in do_mknodat
2024/05/12 13:55 linux-5.15.y 284087d4f7d5 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in do_mknodat
2023/12/06 15:12 linux-5.15.y 9b91d36ba301 e3299f55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in do_mknodat
* Struck through repros no longer work on HEAD.