syzbot

------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88805d3a3d08, owner = 0x0, curr 0xffff88802f3f0000, list empty
WARNING: CPU: 0 PID: 11737 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 11737 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 0 UID: 0 PID: 11737 Comm: syz.1.601 Not tainted 6.11.0-rc6-syzkaller-00019-g67784a74e258 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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 c8 ea 8b 48 c7 c6 20 cb ea 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 73 9b e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 40 75 f7 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc9000398fba0 EFLAGS: 00010296
RAX: e896269367307b00 RBX: ffffffff8beac980 RCX: 0000000000040000
RDX: ffffc9000b2b0000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000398fc70 R08: ffffffff8155b292 R09: 1ffff92000731f14
R10: dffffc0000000000 R11: fffff52000731f15 R12: 0000000000000000
R13: ffff88805d3a3d08 R14: 1ffff92000731f7c R15: dffffc0000000000
FS:  00007f0ffb37a6c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f378aa456c0 CR3: 000000006b7ea000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:805 [inline]
 chown_common+0x50e/0x850 fs/open.c:796
 do_fchownat+0x16a/0x240 fs/open.c:825
 __do_sys_lchown fs/open.c:850 [inline]
 __se_sys_lchown fs/open.c:848 [inline]
 __x64_sys_lchown+0x85/0xa0 fs/open.c:848
 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: 0033:0x7f0ffa579eb9
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:00007f0ffb37a038 EFLAGS: 00000246 ORIG_RAX: 000000000000005e
RAX: ffffffffffffffda RBX: 00007f0ffa716058 RCX: 00007f0ffa579eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000240
RBP: 00007f0ffa5e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f0ffa716058 R15: 00007ffcd4acab78
 </TASK>