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DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888046bcd180, owner = 0x0, curr 0xffff888020020000, list empty
WARNING: CPU: 0 PID: 5398 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 5398 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 0 PID: 5398 Comm: syz-executor.0 Not tainted 6.10.0-rc3-syzkaller #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 a0 ae ca 8b 48 c7 c6 20 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 e0 50 ac 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc90004ae7c80 EFLAGS: 00010292
RAX: 4a61010ddf085100 RBX: ffffffff8bcaaf80 RCX: 0000000000040000
RDX: ffffc90009b69000 RSI: 000000000000f3fb RDI: 000000000000f3fc
RBP: ffffc90004ae7d50 R08: ffffffff81585742 R09: fffffbfff1c39994
R10: dffffc0000000000 R11: fffffbfff1c39994 R12: 0000000000000000
R13: ffff888046bcd180 R14: 1ffff9200095cf98 R15: dffffc0000000000
FS:  00007f67e63486c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32125000 CR3: 0000000078b96000 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]
 unlock_mount fs/namespace.c:2514 [inline]
 do_loopback+0x4ad/0x520 fs/namespace.c:2648
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
 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: 0033:0x7f67e567cf69
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:00007f67e63480c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f67e57b3f80 RCX: 00007f67e567cf69
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 00000000200002c0
RBP: 00007f67e56da6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000101091 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f67e57b3f80 R15: 00007ffc24073fa8
 </TASK>