------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff0000e65e4cf0, owner = 0x0, curr 0xffff0000c5c19b40, list empty
WARNING: CPU: 0 PID: 13944 at kernel/locking/rwsem.c:1323 __up_read+0x530/0x5d8 kernel/locking/rwsem.c:1323
Modules linked in:
CPU: 0 PID: 13944 Comm: syz-executor242 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __up_read+0x530/0x5d8 kernel/locking/rwsem.c:1323
lr : __up_read+0x530/0x5d8 kernel/locking/rwsem.c:1323
sp : ffff800021d37840
x29: ffff800021d378c0 x28: 1ffff0000282e06b x27: 1ffff000043a6f0c
x26: dfff800000000000 x25: ffff800014170000 x24: ffff800021d37860
x23: ffff0000c5c19b40 x22: 0000000000000000 x21: ffff0000e65e4d48
x20: ffff0000e65e4cf0 x19: ffff0000e65e4cf0 x18: 0000000000000002
x17: 0000000040000000 x16: ffff8000111bc798 x15: 0000000000000002
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 6a829a92012cba00
x8 : 6a829a92012cba00 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000850433c
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000008c
Call trace:
 __up_read+0x530/0x5d8 kernel/locking/rwsem.c:1323
 up_read+0x94/0xe8 kernel/locking/rwsem.c:1594
 inode_unlock_shared include/linux/fs.h:802 [inline]
 lookup_slow+0x68/0x80 fs/namei.c:1681
 walk_component+0x2b0/0x3a8 fs/namei.c:1976
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2455
 filename_lookup+0x180/0x414 fs/namei.c:2484
 user_path_at_empty+0x5c/0x1a0 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3354 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount fs/namespace.c:3542 [inline]
 __arm64_sys_mount+0x4e0/0x5e4 fs/namespace.c:3542
 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 130
hardirqs last  enabled at (129): [<ffff800008245a30>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline]
hardirqs last  enabled at (129): [<ffff800008245a30>] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:4784
hardirqs last disabled at (130): [<ffff8000111b7ff8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (112): [<ffff80000819e9e8>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (112): [<ffff80000819e9e8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604
softirqs last disabled at (71): [<ffff80000819efec>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (71): [<ffff80000819efec>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (71): [<ffff80000819efec>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (71): [<ffff80000819efec>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
---[ end trace a1de997c18ae7ff0 ]---
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(tmp < 0): count = 0xffffffffffffff00, magic = 0xffff0000e65e4cf0, owner = 0x0, curr 0xffff0000c5c19b40, list empty
WARNING: CPU: 0 PID: 13944 at kernel/locking/rwsem.c:1328 __up_read+0x390/0x5d8 kernel/locking/rwsem.c:1328
Modules linked in:
CPU: 0 PID: 13944 Comm: syz-executor242 Tainted: G        W         5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __up_read+0x390/0x5d8 kernel/locking/rwsem.c:1328
lr : __up_read+0x390/0x5d8 kernel/locking/rwsem.c:1328
sp : ffff800021d37840
x29: ffff800021d378c0 x28: ffffffffffffff00 x27: 1ffff000043a6f0c
x26: dfff800000000000 x25: ffff0000e65e4cf0 x24: ffff0000e65e4d48
x23: 1fffe0001ccbc99f x22: ffffffffffffff00 x21: 0000000000000000
x20: ffff0000c5c19b40 x19: ffff0000e65e4cf0 x18: 0000000000000002
x17: 0000000000000000 x16: ffff8000111bc798 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000001 x10: 0000000000000000 x9 : 6a829a92012cba00
x8 : 6a829a92012cba00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800021d37138 x4 : ffff80001424f400 x3 : ffff80000a723764
x2 : ffff0001a10c5d50 x1 : 0000000000000001 x0 : 0000000000000087
Call trace:
 __up_read+0x390/0x5d8 kernel/locking/rwsem.c:1328
 up_read+0x94/0xe8 kernel/locking/rwsem.c:1594
 inode_unlock_shared include/linux/fs.h:802 [inline]
 lookup_slow+0x68/0x80 fs/namei.c:1681
 walk_component+0x2b0/0x3a8 fs/namei.c:1976
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2455
 filename_lookup+0x180/0x414 fs/namei.c:2484
 user_path_at_empty+0x5c/0x1a0 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3354 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount fs/namespace.c:3542 [inline]
 __arm64_sys_mount+0x4e0/0x5e4 fs/namespace.c:3542
 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 165
hardirqs last  enabled at (165): [<ffff8000111bacfc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (165): [<ffff8000111bacfc>] exit_to_kernel_mode+0xe0/0x168 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (164): [<ffff8000112849ec>] preempt_schedule_irq+0xac/0x214 kernel/sched/core.c:6781
softirqs last  enabled at (160): [<ffff80000819e9e8>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (160): [<ffff80000819e9e8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604
softirqs last disabled at (133): [<ffff80000819efec>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (133): [<ffff80000819efec>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (133): [<ffff80000819efec>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (133): [<ffff80000819efec>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
---[ end trace a1de997c18ae7ff1 ]---