------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff888068ac4cf0, owner = 0x0, curr 0xffff88802e17da00, list empty
WARNING: CPU: 0 PID: 6933 at kernel/locking/rwsem.c:1345 __up_read+0x628/0x6b0 kernel/locking/rwsem.c:1345
Modules linked in:
CPU: 0 PID: 6933 Comm: syz.0.834 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__up_read+0x628/0x6b0 kernel/locking/rwsem.c:1345
Code: 0f 44 d0 48 c7 c7 20 0b 8c 8a 48 c7 c6 c0 0b 8c 8a 48 89 da 48 8b 4c 24 08 4d 89 e0 4d 89 f1 41 52 e8 5c 55 ea ff 48 83 c4 08 <0f> 0b 4c 8b 3c 24 e9 40 fb ff ff 48 c7 c1 68 56 21 8e 80 e1 07 80
RSP: 0018:ffffc9000631faa0 EFLAGS: 00010296
RAX: fadd6d61d7b74500 RBX: 0000000000000000 RCX: ffff88802e17da00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc9000631fb48 R08: ffffc9000631f727 R09: 1ffff92000c63ee4
R10: dffffc0000000000 R11: fffff52000c63ee5 R12: 0000000000000000
R13: 1ffff92000c63f58 R14: ffff88802e17da00 R15: ffff888068ac4d48
FS: 00007f980a7fe6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f980a7fdff8 CR3: 000000002535a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
inode_unlock_shared include/linux/fs.h:773 [inline]
lookup_slow+0x5e/0x70 fs/namei.c:1716
walk_component+0x2ad/0x3e0 fs/namei.c:2006
lookup_last fs/namei.c:2463 [inline]
path_lookupat+0x148/0x420 fs/namei.c:2487
filename_lookup+0x229/0x580 fs/namei.c:2516
user_path_at_empty+0x3e/0x60 fs/namei.c:2913
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3418 [inline]
__do_sys_mount fs/namespace.c:3629 [inline]
__se_sys_mount+0x2a4/0x3d0 fs/namespace.c:3606
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f980b19de59
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:00007f980a7fe028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f980b426090 RCX: 00007f980b19de59
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007f980b233e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f980b426128 R14: 00007f980b426090 R15: 00007ffc04cadce8
</TASK>