------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff88805dc4ccf0, owner = 0x0, curr 0xffff88805a4dd940, list empty
WARNING: CPU: 0 PID: 6331 at kernel/locking/rwsem.c:1323 __up_read+0x5fe/0x690 kernel/locking/rwsem.c:1323
Modules linked in:
CPU: 0 PID: 6331 Comm: syz-executor.0 Not tainted 5.15.154-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__up_read+0x5fe/0x690 kernel/locking/rwsem.c:1323
Code: 8b 8a 48 0f 44 c1 48 c7 c7 80 1d 8b 8a 48 c7 c6 20 1e 8b 8a 4c 89 fa 4c 89 f1 49 89 d8 4d 89 e9 50 e8 66 13 ea ff 48 83 c4 08 <0f> 0b 48 bb 00 00 00 00 00 fc ff df 4c 8b 2c 24 e9 4e fb ff ff 48
RSP: 0018:ffffc900030179e0 EFLAGS: 00010292
RAX: b23bc154b4019900 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000dc08000 RSI: 000000000000a7a8 RDI: 000000000000a7a9
RBP: ffffc90003017a88 R08: ffffffff8166854c R09: ffffed10173467a8
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88805dc4cd48
R13: ffff88805a4dd940 R14: ffff88805dc4ccf0 R15: 0000000000000000
FS: 00007f02bbcd66c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001040 CR3: 000000007e511000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
inode_unlock_shared include/linux/fs.h:804 [inline]
lookup_slow+0x5e/0x70 fs/namei.c:1681
walk_component+0x48c/0x610 fs/namei.c:1976
lookup_last fs/namei.c:2431 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2455
filename_lookup+0x230/0x5c0 fs/namei.c:2484
user_path_at_empty+0x40/0x180 fs/namei.c:2883
user_path_at include/linux/namei.h:57 [inline]
do_fchmodat fs/open.c:619 [inline]
__do_sys_fchmodat fs/open.c:634 [inline]
__se_sys_fchmodat fs/open.c:631 [inline]
__x64_sys_fchmodat+0xfd/0x1a0 fs/open.c:631
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f02bd784e69
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:00007f02bbcd60c8 EFLAGS: 00000246 ORIG_RAX: 000000000000010c
RAX: ffffffffffffffda RBX: 00007f02bd8b3050 RCX: 00007f02bd784e69
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 000000000000000c
RBP: 00007f02bd7d147a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f02bd8b3050 R15: 00007fff8cfaeac8
</TASK>