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DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88801251b498, owner = 0x0, curr 0xffff888172049e00, list not empty
WARNING: kernel/locking/rwsem.c:1413 at up_write+0x35c/0x4a0, CPU#0: syz.5.4761/31587
Modules linked in:
CPU: 0 UID: 0 PID: 31587 Comm: syz.5.4761 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:up_write+0x40f/0x4a0
Code: 0d 8c 49 c7 c2 80 1b 0d 8c 4c 0f 44 d0 48 8b 7c 24 10 48 c7 c6 20 1e 0d 8c 48 8b 14 24 48 8b 4c 24 08 4d 89 e0 4d 89 f9 41 52 <67> 48 0f b9 3a 48 83 c4 08 e8 53 3a 38 03 e9 d6 fc ff ff 48 c7 c1
RSP: 0018:ffffc900042b7c60 EFLAGS: 00010246
RAX: ffffffff8c0d1ba0 RBX: ffff88801251b498 RCX: ffff88801251b498
RDX: 0000000000000000 RSI: ffffffff8c0d1e20 RDI: ffffffff907d4ab0
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffff888172049e00
R10: ffffffff8c0d1ba0 R11: ffffed10024a3695 R12: 0000000000000000
R13: ffff88801251b4a0 R14: ffff88801251b4f0 R15: ffff888172049e00
FS:  00007f04ab9d56c0(0000) GS:ffff88818d6d6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f697ba6e440 CR3: 000000010beb2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 do_new_mount+0x82d/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f04ad79e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f04ab9d5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f04ada26090 RCX: 00007f04ad79e159
RDX: 0000200000000080 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f04ad835024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f04ada26128 R14: 00007f04ada26090 R15: 00007ffec41fab88
 </TASK>
