syzbot


WARNING in path_openat (2)

Status: upstream: reported on 2024/04/29 18:46
Reported-by: syzbot+7af33ee264a3bdd72bc0@syzkaller.appspotmail.com
First crash: 46d, last: 13d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in path_openat 2 361d 411d 0/3 auto-obsoleted due to no activity on 2023/09/28 05:21
upstream WARNING in path_openat fs C error done 98 4h16m 561d 0/27 upstream: reported C repro on 2022/12/02 03:18
linux-6.1 WARNING in path_openat 5 217d 415d 0/3 auto-obsoleted due to no activity on 2024/02/19 01:27
linux-5.15 WARNING in path_openat (2) 4 9d10h 41d 0/3 upstream: reported on 2024/05/05 16:00

Sample crash report:
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff8880705500e0, owner = 0x0, curr 0xffff888055339dc0, list empty
WARNING: CPU: 1 PID: 3881 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 3881 at kernel/locking/rwsem.c:1372 up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 3881 Comm: syz-executor.1 Not tainted 6.1.92-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1371 [inline]
RIP: 0010:up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Code: 48 c7 c7 60 f5 eb 8a 48 c7 c6 a0 f7 eb 8a 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 df d7 e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 28 be 73 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90005217860 EFLAGS: 00010296
RAX: f55229d666e30c00 RBX: ffffffff8aebf640 RCX: 0000000000040000
RDX: ffffc9000a1d9000 RSI: 000000000001784e RDI: 000000000001784f
RBP: ffffc90005217930 R08: ffffffff81528ede R09: fffff52000a42e6d
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880705500e0 R14: 1ffff92000a42f14 R15: dffffc0000000000
FS:  00007f3b411726c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78ed0e56c6 CR3: 0000000074290000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:763 [inline]
 open_last_lookups fs/namei.c:3556 [inline]
 path_openat+0x1544/0x2e60 fs/namei.c:3782
 do_filp_open+0x230/0x480 fs/namei.c:3812
 do_sys_openat2+0x13b/0x500 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_creat fs/open.c:1410 [inline]
 __se_sys_creat fs/open.c:1404 [inline]
 __x64_sys_creat+0x11f/0x160 fs/open.c:1404
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3b4047cee9
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:00007f3b411720c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f3b405b4070 RCX: 00007f3b4047cee9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f3b404c947f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f3b405b4070 R15: 00007fffe11f3de8
 </TASK>

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/01 17:13 linux-6.1.y 88690811da69 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
2024/06/01 08:05 linux-6.1.y 88690811da69 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
2024/05/31 19:09 linux-6.1.y 88690811da69 0c378259 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
2024/05/31 14:27 linux-6.1.y 88690811da69 0c378259 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
2024/05/12 02:48 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
2024/04/29 18:46 linux-6.1.y dcbc050cb0d3 27e33c58 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
* Struck through repros no longer work on HEAD.