DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888048a180d8, owner = 0x0, curr 0xffff88802b5b1e80, list empty
WARNING: kernel/locking/rwsem.c:1381 at __up_write kernel/locking/rwsem.c:1380 [inline], CPU#1: syz.5.1072/11025
WARNING: kernel/locking/rwsem.c:1381 at up_write+0x426/0x430 kernel/locking/rwsem.c:1643, CPU#1: syz.5.1072/11025
Modules linked in:
CPU: 1 UID: 0 PID: 11025 Comm: syz.5.1072 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__up_write kernel/locking/rwsem.c:1380 [inline]
RIP: 0010:up_write+0x426/0x430 kernel/locking/rwsem.c:1643
Code: d0 48 c7 c7 00 0d 6b 8b 48 c7 c6 20 0f 6b 8b 48 8b 14 24 4c 89 f1 4d 89 e0 4c 8b 4c 24 08 41 52 e8 9f c9 e5 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 cd fd ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000401fc10 EFLAGS: 00010292
RAX: f91599e5917bb700 RBX: ffff888048a180d8 RCX: 0000000000080000
RDX: ffffc9001a8f7000 RSI: 0000000000006122 RDI: 0000000000006123
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba720 R12: 0000000000000000
R13: ffff888048a18130 R14: ffff888048a180d8 R15: 1ffff1100914301c
FS:  00007f05a28626c0(0000) GS:ffff888125fba000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1f01d4bb2 CR3: 0000000073390000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:1037 [inline]
 chown_common+0x418/0x5b0 fs/open.c:790
 do_fchownat+0x161/0x270 fs/open.c:819
 __do_sys_fchownat fs/open.c:834 [inline]
 __se_sys_fchownat fs/open.c:831 [inline]
 __x64_sys_fchownat+0xb5/0xd0 fs/open.c:831
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f05a198f749
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:00007f05a2862038 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 00007f05a1be6090 RCX: 00007f05a198f749
RDX: 0000000000000000 RSI: 0000200000000680 RDI: ffffffffffffff9c
RBP: 00007f05a1a13f91 R08: 0000000000001000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f05a1be6128 R14: 00007f05a1be6090 R15: 00007ffdb7918938
 </TASK>