syzbot


WARNING in filename_create

Status: moderation: reported on 2024/06/11 04:53
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+643068fba926e24595d3@syzkaller.appspotmail.com
First crash: 8d01h, last: 8d01h

Sample crash report:
WARNING: CPU: 0 PID: 12468 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 12468 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 0 PID: 12468 Comm: syz-executor.4 Not tainted 6.10.0-rc2-syzkaller-00222-gd30d0e49da71 #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 c0 ae ca 8b 48 c7 c6 40 b1 ca 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 73 a6 e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 60 51 ac 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc90009ae7c20 EFLAGS: 00010292
RAX: ef85312df9975900 RBX: ffffffff8bcaafa0 RCX: ffff888023099e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90009ae7cf0 R08: ffffffff815856c2 R09: 1ffff110172a519a
R10: dffffc0000000000 R11: ffffed10172a519b R12: 0000000000000000
R13: ffff8880549f2f70 R14: 1ffff9200135cf8c R15: dffffc0000000000
FS:  00007f1da27de6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1da27bdd58 CR3: 000000005176c000 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]
 filename_create+0x38b/0x540 fs/namei.c:3929
 do_mknodat+0x18b/0x5b0 fs/namei.c:4046
 __do_sys_mknod fs/namei.c:4092 [inline]
 __se_sys_mknod fs/namei.c:4090 [inline]
 __x64_sys_mknod+0x8e/0xa0 fs/namei.c:4090
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1da2c7cf69
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:00007f1da27de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f1da2db4050 RCX: 00007f1da2c7cf69
RDX: 0000000000000709 RSI: 0000000000002000 RDI: 0000000020000040
RBP: 00007f1da2cda6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f1da2db4050 R15: 00007ffefe2b5838
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/07 04:43 upstream d30d0e49da71 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in filename_create
* Struck through repros no longer work on HEAD.