syzbot


WARNING in path_openat (2)

Status: upstream: reported on 2024/04/29 18:46
Reported-by: syzbot+7af33ee264a3bdd72bc0@syzkaller.appspotmail.com
First crash: 124d, last: 36d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in path_openat 2 438d 488d 0/3 auto-obsoleted due to no activity on 2023/09/28 05:21
upstream WARNING in path_openat fs C error done 124 2d06h 638d 0/27 upstream: reported C repro on 2022/12/02 03:18
linux-6.1 WARNING in path_openat 5 294d 492d 0/3 auto-obsoleted due to no activity on 2024/02/19 01:27
linux-5.15 WARNING in path_openat (2) 4 86d 118d 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 = 0xffff8880514b3d58, owner = 0x0, curr 0xffff888021890000, list empty
WARNING: CPU: 1 PID: 5783 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 5783 at kernel/locking/rwsem.c:1372 up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 5783 Comm: syz.4.423 Not tainted 6.1.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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 e0 f5 0b 8b 48 c7 c6 20 f8 0b 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 9f d3 e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 a8 f1 99 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90004fe7840 EFLAGS: 00010292
RAX: a8b34311fe5f4600 RBX: ffffffff8b0bf6c0 RCX: 0000000000040000
RDX: ffffc90013a0d000 RSI: 0000000000027ea4 RDI: 0000000000027ea5
RBP: ffffc90004fe7910 R08: ffffffff815293ae R09: fffff520009fce69
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880514b3d58 R14: 1ffff920009fcf10 R15: dffffc0000000000
FS:  00007f48a28cf6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4508356c0 CR3: 0000000063f04000 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/0x4f0 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_open fs/open.c:1342 [inline]
 __se_sys_open fs/open.c:1338 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1338
 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: 0033:0x7f48a1b77299
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48a28cf048 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f48a1d06058 RCX: 00007f48a1b77299
RDX: 0000000000000000 RSI: 00000000000c0040 RDI: 00000000200002c0
RBP: 00007f48a1be48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f48a1d06058 R15: 00007ffd63ff1ca8
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/26 18:05 linux-6.1.y c18e82d3ee44 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
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.