DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888056ea71d0, owner = 0x0, curr 0xffff88802e09d940, list empty
WARNING: CPU: 1 PID: 3977 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 3977 at kernel/locking/rwsem.c:1372 up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 3977 Comm: syz.3.54 Not tainted 6.1.108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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 00 f6 0b 8b 48 c7 c6 40 f8 0b 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 df cd e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 e8 0f 9a 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90004fefca0 EFLAGS: 00010296
RAX: 30a01e5872d9cc00 RBX: ffffffff8b0bf6e0 RCX: 0000000000040000
RDX: ffffc9000ab81000 RSI: 000000000000c156 RDI: 000000000000c157
RBP: ffffc90004fefd70 R08: ffffffff8152a40e R09: fffff520009fdef5
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888056ea71d0 R14: 1ffff920009fdf9c R15: dffffc0000000000
FS:  00007f27898046c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd2dfbded8 CR3: 00000000612f0000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:763 [inline]
 unlock_mount fs/namespace.c:2325 [inline]
 do_loopback+0x4a5/0x510 fs/namespace.c:2459
 do_mount fs/namespace.c:3394 [inline]
 __do_sys_mount fs/namespace.c:3602 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579
 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: 0033:0x7f278897cef9
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:00007f2789804038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2788b36058 RCX: 00007f278897cef9
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 00000000200002c0
RBP: 00007f27889ef01e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000101091 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f2788b36058 R15: 00007ffec5803f68
 </TASK>