------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff88806f598330, owner = 0x0, curr 0xffff88801beb9dc0, list empty
WARNING: CPU: 0 PID: 5817 at kernel/locking/rwsem.c:1323 __up_read+0x625/0x6b0 kernel/locking/rwsem.c:1323
Modules linked in:
CPU: 0 PID: 5817 Comm: syz.0.148 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__up_read+0x625/0x6b0 kernel/locking/rwsem.c:1323
Code: 0f 44 d0 48 c7 c7 00 1b 2b 8a 48 c7 c6 a0 1b 2b 8a 48 89 da 48 8b 4c 24 08 4d 89 e0 4d 89 f1 41 52 e8 4f e2 54 08 48 83 c4 08 <0f> 0b 4c 8b 3c 24 e9 43 fb ff ff 48 c7 c1 c8 0f 8a 8d 80 e1 07 80
RSP: 0018:ffffc900032cfa80 EFLAGS: 00010292
RAX: 99a57fae6838f300 RBX: 0000000000000000 RCX: ffff88801beb9dc0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900032cfb30 R08: ffff8880b9033d7f R09: 1ffff110172067af
R10: dffffc0000000000 R11: ffffed10172067b0 R12: 0000000000000000
R13: 1ffff92000659f54 R14: ffff88801beb9dc0 R15: ffff88806f598388
FS:  00007f620194e6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd784cd5000 CR3: 0000000023939000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock_shared include/linux/fs.h:802 [inline]
 lookup_slow+0x5e/0x70 fs/namei.c:1689
 walk_component+0x319/0x460 fs/namei.c:1984
 lookup_last fs/namei.c:2439 [inline]
 path_lookupat+0x169/0x440 fs/namei.c:2463
 filename_lookup+0x214/0x540 fs/namei.c:2492
 user_path_at_empty+0x40/0x190 fs/namei.c:2891
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3374 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2a4/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f620230bef9
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:00007f620194e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6202577090 RCX: 00007f620230bef9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007f62023a0ee0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6202577128 R14: 00007f6202577090 R15: 00007ffcd7a2d7d8
 </TASK>