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DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888011c5d058, owner = 0x0, curr 0xffff8880002324c0, list empty
WARNING: kernel/locking/rwsem.c:1381 at __up_write kernel/locking/rwsem.c:1380 [inline], CPU#0: syz.0.0/5359
WARNING: kernel/locking/rwsem.c:1381 at up_write+0x2d8/0x410 kernel/locking/rwsem.c:1643, CPU#0: syz.0.0/5359
Modules linked in:
CPU: 0 UID: 0 PID: 5359 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__up_write kernel/locking/rwsem.c:1380 [inline]
RIP: 0010:up_write+0x38a/0x410 kernel/locking/rwsem.c:1643
Code: 6b 8b 49 c7 c2 c0 23 6b 8b 4c 0f 44 d0 48 8b 7c 24 08 48 c7 c6 e0 24 6b 8b 48 8b 14 24 4c 89 f1 4d 89 e0 4c 8b 4c 24 10 41 52 <67> 48 0f b9 3a 48 83 c4 08 e8 68 9e ee 02 e9 66 fd ff ff 48 c7 c1
RSP: 0018:ffffc9000ce77d80 EFLAGS: 00010246
RAX: ffffffff8b6b23a0 RBX: ffff888011c5d058 RCX: ffff888011c5d058
RDX: 0000000000000000 RSI: ffffffff8b6b24e0 RDI: ffffffff8f858550
RBP: ffff888011c5d0b0 R08: 0000000000000000 R09: ffff8880002324c0
R10: ffffffff8b6b23a0 R11: ffffed100238ba0d R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888011c5d058 R15: 1ffff1100238ba0c
FS: 00007f3ec40286c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ec4027fc8 CR3: 000000001170b000 CR4: 0000000000352ef0
Call Trace:
<TASK>
inode_unlock include/linux/fs.h:1037 [inline]
__start_dirop fs/namei.c:2868 [inline]
start_dirop fs/namei.c:2875 [inline]
do_rmdir+0x1e6/0x4a0 fs/namei.c:5284
__do_sys_rmdir fs/namei.c:5315 [inline]
__se_sys_rmdir fs/namei.c:5313 [inline]
__x64_sys_rmdir+0x47/0x50 fs/namei.c:5313
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3ec318f7c9
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:00007f3ec4028038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f3ec33e6180 RCX: 00007f3ec318f7c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007f3ec3213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3ec33e6218 R14: 00007f3ec33e6180 R15: 00007ffe5775c538
</TASK>
----------------
Code disassembly (best guess):
0: 6b 8b 49 c7 c2 c0 23 imul $0x23,-0x3f3d38b7(%rbx),%ecx
7: 6b 8b 4c 0f 44 d0 48 imul $0x48,-0x2fbbf0b4(%rbx),%ecx
e: 8b 7c 24 08 mov 0x8(%rsp),%edi
12: 48 c7 c6 e0 24 6b 8b mov $0xffffffff8b6b24e0,%rsi
19: 48 8b 14 24 mov (%rsp),%rdx
1d: 4c 89 f1 mov %r14,%rcx
20: 4d 89 e0 mov %r12,%r8
23: 4c 8b 4c 24 10 mov 0x10(%rsp),%r9
28: 41 52 push %r10
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 83 c4 08 add $0x8,%rsp
33: e8 68 9e ee 02 call 0x2ee9ea0
38: e9 66 fd ff ff jmp 0xfffffda3
3d: 48 rex.W
3e: c7 .byte 0xc7
3f: c1 .byte 0xc1