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WARNING: kernel/signal.c:2174 at do_notify_parent+0x904/0xa50 kernel/signal.c:2261, CPU#1: syz.0.222/4114
Modules linked in:
CPU: 1 UID: 0 PID: 4114 Comm: syz.0.222 Not tainted syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : do_notify_parent+0x904/0xa50 kernel/signal.c:2174
lr : exit_notify kernel/exit.c:758 [inline]
lr : do_exit+0x1380/0x2160 kernel/exit.c:988
sp : ffff8000a2927b50
x29: ffff8000a2927c40 x28: ffff00000f292250 x27: ffff00000f291cc0
x26: ffff00000f2922c0 x25: 1fffe00001e5244a x24: dfff800000000000
x23: ffff00001448b2d0 x22: 1ffff00014524f6c x21: 0000000000000080
x20: 1fffe00001e524c0 x19: ffff8000a2927bd0 x18: 0000000000000000
x17: 1ffff00010f1319a x16: 1fffe0000206342b x15: ffff80008022cdbc
x14: ffff80008022c274 x13: ffff80008022c274 x12: ffff700014524f7d
x11: 1ffff00014524f7c x10: ffff700014524f7c x9 : dfff800000000000
x8 : 0000000000000003 x7 : 00000000f200f2f2 x6 : 000000000000f2f2
x5 : dfff800000000000 x4 : 00000000f3f3f3f3 x3 : 0000000000000080
x2 : ffff700014524f6c x1 : ffff00000f291cc0 x0 : 0000000000000000
Call trace:
 do_notify_parent+0x904/0xa50 kernel/signal.c:2261 (P)
 exit_notify kernel/exit.c:758 [inline]
 do_exit+0x1380/0x2160 kernel/exit.c:988
 __do_sys_exit kernel/exit.c:1086 [inline]
 __se_sys_exit kernel/exit.c:1084 [inline]
 __arm64_sys_exit+0x3c/0x44 kernel/exit.c:1084
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x74/0x240 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:140
 el0_svc+0x58/0x2a4 arch/arm64/kernel/entry-common.c:723
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:742
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
irq event stamp: 868
hardirqs last  enabled at (867): [<ffff80008043a4cc>] __call_rcu_common.constprop.0+0x30c/0x920 kernel/rcu/tree.c:3156
hardirqs last disabled at (868): [<ffff8000858155f0>] __raw_write_lock_irq include/linux/rwlock_api_smp.h:211 [inline]
hardirqs last disabled at (868): [<ffff8000858155f0>] _raw_write_lock_irq+0x70/0x80 kernel/locking/spinlock.c:330
softirqs last  enabled at (764): [<ffff800080232f6c>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (764): [<ffff800080232f6c>] handle_softirqs+0xa9c/0x1050 kernel/softirq.c:650
softirqs last disabled at (581): [<ffff8000800103d4>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---