syzbot


WARNING in do_unlinkat

Status: moderation: reported on 2024/05/27 02:23
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+fcf53a01690d6a9a7104@syzkaller.appspotmail.com
First crash: 23d, last: 23d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in do_unlinkat 1 72d 72d 0/3 upstream: reported on 2024/04/03 10:00
linux-6.1 WARNING in do_unlinkat 2 29d 33d 0/3 upstream: reported on 2024/05/13 03:47

Sample crash report:
WARNING: CPU: 0 PID: 8099 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 8099 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 0 PID: 8099 Comm: syz-executor.2 Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Code: c7 c7 00 ac ca 8b 48 c7 c6 80 ae ca 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 93 93 e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 a0 3e ac 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc90003097cc0 EFLAGS: 00010296
RAX: c98b612b79ef4400 RBX: ffffffff8bcaace0 RCX: 0000000000040000
RDX: ffffc9000a09a000 RSI: 000000000000f3c7 RDI: 000000000000f3c8
RBP: ffffc90003097d90 R08: ffffffff815856f2 R09: fffffbfff1c3996c
R10: dffffc0000000000 R11: fffffbfff1c3996c R12: 0000000000000000
R13: ffff8880592bb6a0 R14: 1ffff92000612fa0 R15: dffffc0000000000
FS:  00007efcf67de6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32329000 CR3: 000000004fbbe000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:796 [inline]
 do_unlinkat+0x500/0x830 fs/namei.c:4412
 __do_sys_unlink fs/namei.c:4455 [inline]
 __se_sys_unlink fs/namei.c:4453 [inline]
 __x64_sys_unlink+0x49/0x60 fs/namei.c:4453
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efcf6c7cee9
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:00007efcf67de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007efcf6dac050 RCX: 00007efcf6c7cee9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007efcf6cc949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efcf6dac050 R15: 00007ffcd4ce7608
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/23 02:39 upstream 8f6a15f095a6 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in do_unlinkat
2024/05/23 02:19 upstream 8f6a15f095a6 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in do_unlinkat
* Struck through repros no longer work on HEAD.