------------[ cut here ]------------
WARNING: kernel/signal.c:2174 at do_notify_parent+0xbd4/0xcc0 kernel/signal.c:-1, CPU#1: syz.3.347/6165
Modules linked in:
CPU: 1 UID: 0 PID: 6165 Comm: syz.3.347 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : do_notify_parent+0xbd4/0xcc0 kernel/signal.c:-1
lr : do_notify_parent+0xbd0/0xcc0 kernel/signal.c:2174
sp : ffff80009b1b7780
x29: ffff80009b1b7880 x28: ffff80009b1b77a0 x27: dfff800000000000
x26: ffff700013636ef4 x25: ffff80009b1b7960 x24: dfff800000000000
x23: ffff0000f388a290 x22: 0000000000000080 x21: 0000000000000080
x20: 0000000000000000 x19: ffff0000f3889d00 x18: 1fffe00035c0cc20
x17: ffff80008897b000 x16: ffff800088a2dba0 x15: ffff0001ae06610c
x14: ffff0001ae066108 x13: 0000000000000006 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000001
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff800080328760
x2 : 0000000000000080 x1 : ffff0000f3889d00 x0 : 0000000000000000
Call trace:
 do_notify_parent+0xbd4/0xcc0 kernel/signal.c:-1 (P)
 exit_notify kernel/exit.c:755 [inline]
 do_exit+0x1760/0x1a6c kernel/exit.c:988
 do_group_exit+0x194/0x22c kernel/exit.c:1119
 get_signal+0xfb0/0x1094 kernel/signal.c:3037
 arch_do_signal_or_restart+0x290/0x43a0 arch/arm64/kernel/signal.c:1665
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x70/0x17c kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline]
 el0_svc+0x18c/0x260 arch/arm64/kernel/entry-common.c:741
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
irq event stamp: 860
hardirqs last  enabled at (859): [<ffff8000867c300c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline]
hardirqs last  enabled at (859): [<ffff8000867c300c>] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:198
hardirqs last disabled at (860): [<ffff8000867c37ec>] __raw_write_lock_irq include/linux/rwlock_api_smp.h:211 [inline]
hardirqs last disabled at (860): [<ffff8000867c37ec>] _raw_write_lock_irq+0x28/0x70 kernel/locking/spinlock.c:330
softirqs last  enabled at (238): [<ffff800080309080>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (238): [<ffff800080309080>] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650
softirqs last disabled at (233): [<ffff8000800204b0>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---