syzbot

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DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff888032eae310, owner = 0x0, curr 0xffff88801d9f2440, list empty
WARNING: CPU: 0 PID: 8825 at kernel/locking/rwsem.c:1343 __up_read+0x5fb/0x760 kernel/locking/rwsem.c:1343
Modules linked in:
CPU: 0 PID: 8825 Comm: syz-executor284 Not tainted 6.9.0-rc2-syzkaller-00413-gf2f80ac80987 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__up_read+0x5fb/0x760 kernel/locking/rwsem.c:1343
Code: 3c 02 00 0f 85 c0 00 00 00 48 8b 13 41 57 4c 89 f1 48 c7 c6 c0 c3 2c 8b 4c 8b 4c 24 10 48 c7 c7 60 c2 2c 8b e8 86 81 e5 ff 90 <0f> 0b 90 90 59 e9 fc fa ff ff 48 c7 c7 14 86 e1 8f 48 89 04 24 e8
RSP: 0018:ffffc9000cfcfb38 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888032eae310 RCX: ffffffff814fe349
RDX: ffff88801d9f2440 RSI: ffffffff814fe356 RDI: 0000000000000001
RBP: ffffffff8fe18614 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888032eae318
R13: 1ffff920019f9f6b R14: ffff888032eae310 R15: ffffffff8b2cc1a0
FS:  00007f51eb6556c0(0000) GS:ffff88806b000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f51e33ff000 CR3: 000000001bb56000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock_shared include/linux/fs.h:810 [inline]
 lookup_slow fs/namei.c:1710 [inline]
 walk_component+0x35b/0x5b0 fs/namei.c:2004
 lookup_last fs/namei.c:2461 [inline]
 path_lookupat+0x17f/0x770 fs/namei.c:2485
 filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
 user_path_at_empty+0x42/0x60 fs/namei.c:2921
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_chdir fs/open.c:558 [inline]
 __se_sys_chdir fs/open.c:552 [inline]
 __x64_sys_chdir+0xc2/0x270 fs/open.c:552
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f51eb6c7a79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 1b 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:00007f51eb655218 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 0000000000000040 RCX: 00007f51eb6c7a79
RDX: 00007f51eb6c7a79 RSI: 00007f51eb69f036 RDI: 0000000020000380
RBP: 00007f51eb7666b8 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffc48cce417 R11: 0000000000000246 R12: 00007f51eb7666b0
R13: 00007f51eb7666bc R14: 6573726168636f69 R15: 0030656c69662f2e
 </TASK>