syzbot
WARNING in do_mknodat (3)
Status:
auto-obsoleted due to no activity on 2025/08/12 05:18
Reported-by: syzbot+3fd0cea8c9d8df19c688@syzkaller.appspotmail.com
First crash: 660d, last: 450d
Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888073fad180, owner = 0x0, curr 0xffff88807ad95940, list empty
WARNING: CPU: 1 PID: 4865 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 4865 at kernel/locking/rwsem.c:1372 up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 4865 Comm: syz.3.187 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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 c0 10 0c 8b 48 c7 c6 00 13 0c 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 4f bb e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 38 e9 a0 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d5efd20 EFLAGS: 00010292
RAX: 15d90bce3e6eb000 RBX: ffffffff8b0c11a0 RCX: 0000000000080000
RDX: ffffc9000ed72000 RSI: 000000000001aea7 RDI: 000000000001aea8
RBP: ffffc9000d5efdf0 R08: ffffffff8152c26e R09: fffff52001abdf05
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888073fad180 R14: 1ffff92001abdfac R15: dffffc0000000000
FS: 00007fa0316396c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562ff50d9000 CR3: 000000002c3a4000 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]
done_path_create fs/namei.c:3927 [inline]
do_mknodat+0x44f/0x5a0 fs/namei.c:4050
__do_sys_mknodat fs/namei.c:4063 [inline]
__se_sys_mknodat fs/namei.c:4060 [inline]
__x64_sys_mknodat+0xa5/0xc0 fs/namei.c:4060
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: 0033:0x7fa03078d169
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:00007fa031639038 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007fa0309a6080 RCX: 00007fa03078d169
RDX: 0000000000000000 RSI: 00004000000000c0 RDI: ffffffffffffff9c
RBP: 00007fa03080e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fa0309a6080 R15: 00007ffdd0bb79d8
</TASK>
* Struck through repros no longer work on HEAD.