------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff0000e669f1d0, owner = 0x0, curr 0xffff0000c7a051c0, list empty
WARNING: CPU: 0 PID: 4848 at kernel/locking/rwsem.c:1323 __up_read+0x568/0x60c kernel/locking/rwsem.c:1323
Modules linked in:
CPU: 0 PID: 4848 Comm: syz-executor.0 Not tainted 5.15.159-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __up_read+0x568/0x60c kernel/locking/rwsem.c:1323
lr : __up_read+0x568/0x60c kernel/locking/rwsem.c:1323
sp : ffff80001f3277a0
x29: ffff80001f327820 x28: 1ffff0000292a06a x27: ffff800014950000
x26: dfff800000000000 x25: 0000000000000000 x24: ffff0000e669f228
x23: ffff0000c7a051c0 x22: ffff80001f3277c0 x21: 0000000000000000
x20: ffff0000e669f1d0 x19: ffff0000e669f1d0 x18: 1fffe000368fd38e
x17: 1fffe000368fd38e x16: ffff80001199c7e0 x15: ffff8000149eec00
x14: 1ffff0000292a06a x13: dfff800000000000 x12: 0000000000040000
x11: 0000000000017b1d x10: ffff80001d69a000 x9 : 34092c04ffeda500
x8 : 34092c04ffeda500 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000a978760
x2 : ffff0001b47e9d10 x1 : 0000000100000000 x0 : 000000000000008c
Call trace:
 __up_read+0x568/0x60c kernel/locking/rwsem.c:1323
 up_read+0x94/0xe8 kernel/locking/rwsem.c:1594
 inode_unlock_shared include/linux/fs.h:804 [inline]
 lookup_slow+0x6c/0x84 fs/namei.c:1681
 walk_component+0x394/0x4cc fs/namei.c:1976
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2455
 filename_lookup+0x1c4/0x4c8 fs/namei.c:2484
 user_path_at_empty+0x5c/0x1a4 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3345 [inline]
 __do_sys_mount fs/namespace.c:3556 [inline]
 __se_sys_mount fs/namespace.c:3533 [inline]
 __arm64_sys_mount+0x4dc/0x5e0 fs/namespace.c:3533
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 724
hardirqs last  enabled at (723): [<ffff800008269adc>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline]
hardirqs last  enabled at (723): [<ffff800008269adc>] finish_lock_switch+0xbc/0x1e8 kernel/sched/core.c:4784
hardirqs last disabled at (724): [<ffff800011997e6c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (718): [<ffff800008021c64>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (718): [<ffff800008021c64>] __do_softirq+0xb5c/0xdb0 kernel/softirq.c:587
softirqs last disabled at (677): [<ffff8000081b6568>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (677): [<ffff8000081b6568>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (677): [<ffff8000081b6568>] __irq_exit_rcu+0x264/0x4d4 kernel/softirq.c:637
---[ end trace 9456ce3fba305ed1 ]---
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(tmp < 0): count = 0xffffffffffffff00, magic = 0xffff0000e669f1d0, owner = 0x0, curr 0xffff0000c7a051c0, list empty
WARNING: CPU: 0 PID: 4848 at kernel/locking/rwsem.c:1328 __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1328
Modules linked in:
CPU: 0 PID: 4848 Comm: syz-executor.0 Tainted: G        W         5.15.159-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1328
lr : __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1328
sp : ffff80001f3277a0
x29: ffff80001f327820 x28: 1ffff0000292a06a x27: ffff800014950000
x26: dfff800000000000 x25: ffffffffffffff00 x24: ffff0000e669f228
x23: ffff0000e669f1d0 x22: ffffffffffffff00 x21: 0000000000000000
x20: ffff0000c7a051c0 x19: ffff0000e669f1d0 x18: 0000000000000002
x17: 0000000000000002 x16: ffff80001199c7e0 x15: 00000000ffffffff
x14: ffff0000c7a051c0 x13: 0000000000000001 x12: 0000000000040000
x11: 000000000002921d x10: ffff80001d69a000 x9 : 34092c04ffeda500
x8 : 34092c04ffeda500 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f326f18 x4 : ffff800014a2f7a0 x3 : ffff8000085501f8
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000087
Call trace:
 __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1328
 up_read+0x94/0xe8 kernel/locking/rwsem.c:1594
 inode_unlock_shared include/linux/fs.h:804 [inline]
 lookup_slow+0x6c/0x84 fs/namei.c:1681
 walk_component+0x394/0x4cc fs/namei.c:1976
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2455
 filename_lookup+0x1c4/0x4c8 fs/namei.c:2484
 user_path_at_empty+0x5c/0x1a4 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3345 [inline]
 __do_sys_mount fs/namespace.c:3556 [inline]
 __se_sys_mount fs/namespace.c:3533 [inline]
 __arm64_sys_mount+0x4dc/0x5e0 fs/namespace.c:3533
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 883
hardirqs last  enabled at (883): [<ffff80001199ac74>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (883): [<ffff80001199ac74>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (882): [<ffff800011a607d8>] preempt_schedule_irq+0xac/0x274 kernel/sched/core.c:6781
softirqs last  enabled at (878): [<ffff800008021c64>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (878): [<ffff800008021c64>] __do_softirq+0xb5c/0xdb0 kernel/softirq.c:587
softirqs last disabled at (727): [<ffff8000081b6568>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (727): [<ffff8000081b6568>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (727): [<ffff8000081b6568>] __irq_exit_rcu+0x264/0x4d4 kernel/softirq.c:637
---[ end trace 9456ce3fba305ed2 ]---