syzbot

------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff0000f4992930, owner = 0x0, curr 0xffff0000c4141bc0, list empty
WARNING: CPU: 1 PID: 5541 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 5541 at kernel/locking/rwsem.c:1372 up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 5541 Comm: syz.5.244 Not tainted 6.1.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __up_write kernel/locking/rwsem.c:1371 [inline]
pc : up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
lr : __up_write kernel/locking/rwsem.c:1371 [inline]
lr : up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
sp : ffff8000219479e0
x29: ffff800021947a70 x28: 1ffff00004328f68 x27: 1fffe0001e932533
x26: dfff800000000000 x25: 1fffe0001e932527 x24: ffff0000f4992988
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000c4141bc0
x20: ffff0000f4992930 x19: ffff0000f4992930 x18: ffff800021947580
x17: 0000000000000000 x16: ffff8000122975f4 x15: 0000000000000002
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000080000
x11: 0000000000014d05 x10: ffff8000331ba000 x9 : 98ca58230759aa00
x8 : 98ca58230759aa00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000219472d8 x4 : ffff800015ab30e0 x3 : ffff800008585a08
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
Call trace:
 __up_write kernel/locking/rwsem.c:1371 [inline]
 up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
 inode_unlock include/linux/fs.h:763 [inline]
 unlock_mount+0x1d8/0x244 fs/namespace.c:2325
 do_new_mount_fc fs/namespace.c:2999 [inline]
 do_new_mount+0x700/0x8fc fs/namespace.c:3058
 path_mount+0x590/0xe5c fs/namespace.c:3386
 do_mount fs/namespace.c:3399 [inline]
 __do_sys_mount fs/namespace.c:3607 [inline]
 __se_sys_mount fs/namespace.c:3584 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3584
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 294
hardirqs last  enabled at (293): [<ffff80000833eab0>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261
hardirqs last disabled at (294): [<ffff8000122932ac>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (256): [<ffff8000081c1c58>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last  enabled at (256): [<ffff8000081c1c58>] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599
softirqs last disabled at (237): [<ffff800008020174>] __do_softirq+0x14/0x20 kernel/softirq.c:605
---[ end trace 0000000000000000 ]---