------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff888043995058, owner = 0x0, curr 0xffff88800063a4c0, list empty
WARNING: kernel/locking/rwsem.c:1354 at 0x0, CPU#0: syz.0.0/5356
Modules linked in:
CPU: 0 UID: 0 PID: 5356 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_read+0x5df/0x670 kernel/locking/rwsem.c:1354
Code: 23 6b 8b 49 c7 c2 00 24 6b 8b 4c 0f 44 d0 48 8b 7c 24 28 48 c7 c6 a0 23 6b 8b 4c 89 ea 48 8b 4c 24 20 4d 89 f0 4d 89 f9 41 52 <67> 48 0f b9 3a 48 83 c4 08 e8 c3 a4 eb 02 e9 6e fb ff ff 48 c7 c1
RSP: 0018:ffffc9000d6f7878 EFLAGS: 00010246
RAX: ffffffff8b6b23e0 RBX: ffff888043995058 RCX: ffff888043995058
RDX: 0000000000000000 RSI: ffffffff8b6b23a0 RDI: ffffffff8f848b80
RBP: ffffc9000d6f7950 R08: 0000000000000000 R09: ffff88800063a4c0
R10: ffffffff8b6b23e0 R11: ffffed1008732a0d R12: ffff8880439950b0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88800063a4c0
FS:  00007f09a11fc6c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09a11fbfc8 CR3: 000000000b5d7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 inode_unlock_shared include/linux/fs.h:1052 [inline]
 open_last_lookups fs/namei.c:4550 [inline]
 path_openat+0x1b7d/0x3dd0 fs/namei.c:4784
 do_filp_open+0x1fa/0x410 fs/namei.c:4814
 do_sys_openat2+0x121/0x200 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09a038f7c9
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:00007f09a11fc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f09a05e6180 RCX: 00007f09a038f7c9
RDX: 0000000000000000 RSI: 0000200000000140 RDI: ffffffffffffff9c
RBP: 00007f09a0413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000042 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f09a05e6218 R14: 00007f09a05e6180 R15: 00007ffe4dd0e758
 </TASK>
----------------
Code disassembly (best guess):
   0:	23 6b 8b             	and    -0x75(%rbx),%ebp
   3:	49 c7 c2 00 24 6b 8b 	mov    $0xffffffff8b6b2400,%r10
   a:	4c 0f 44 d0          	cmove  %rax,%r10
   e:	48 8b 7c 24 28       	mov    0x28(%rsp),%rdi
  13:	48 c7 c6 a0 23 6b 8b 	mov    $0xffffffff8b6b23a0,%rsi
  1a:	4c 89 ea             	mov    %r13,%rdx
  1d:	48 8b 4c 24 20       	mov    0x20(%rsp),%rcx
  22:	4d 89 f0             	mov    %r14,%r8
  25:	4d 89 f9             	mov    %r15,%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 c3 a4 eb 02       	call   0x2eba4fb
  38:	e9 6e fb ff ff       	jmp    0xfffffbab
  3d:	48                   	rex.W
  3e:	c7                   	.byte 0xc7
  3f:	c1                   	.byte 0xc1