------------[ cut here ]------------
WARNING: kernel/signal.c:2174 at do_notify_parent+0x904/0xa50 kernel/signal.c:2261, CPU#1: syz.1.1303/6140
Modules linked in:
CPU: 1 UID: 0 PID: 6140 Comm: syz.1.1303 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:757 [inline]
lr : do_exit+0x1334/0x2100 kernel/exit.c:987
sp : ffff80008e5f7b50
x29: ffff80008e5f7c40 x28: ffff00000ed1bf10 x27: ffff00000ed1b980
x26: ffff00000ed1bf80 x25: 1fffe00001da37e2 x24: ffff800087639000
x23: ffff0000172f1d10 x22: 1ffff00011cbef6c x21: 0000000000000080
x20: 1fffe00001da3858 x19: ffff80008e5f7bd0 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: ffff80008766f6f0
x14: 0000000000001790 x13: 0000000000001798 x12: ffff700011cbef7d
x11: 1ffff00011cbef7c x10: ffff700011cbef7c x9 : dfff800000000000
x8 : 0000000000000003 x7 : 00000000f200f2f2 x6 : 000000000000f2f2
x5 : dfff800000000000 x4 : 00000000f3f3f3f3 x3 : 0000000000000080
x2 : ffff700011cbef6c x1 : ffff00000ed1b980 x0 : 0000000000000000
Call trace:
 do_notify_parent+0x904/0xa50 kernel/signal.c:2261 (P)
 exit_notify kernel/exit.c:757 [inline]
 do_exit+0x1334/0x2100 kernel/exit.c:987
 __do_sys_exit kernel/exit.c:1084 [inline]
 __se_sys_exit kernel/exit.c:1082 [inline]
 __arm64_sys_exit+0x3c/0x44 kernel/exit.c:1082
 __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_compat+0x40/0x58 arch/arm64/kernel/syscall.c:146
 el0_svc_compat+0x54/0x270 arch/arm64/kernel/entry-common.c:874
 el0t_32_sync_handler+0x88/0xac arch/arm64/kernel/entry-common.c:892
 el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:599
irq event stamp: 794
hardirqs last  enabled at (793): [<ffff800085801bb0>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline]
hardirqs last  enabled at (793): [<ffff800085801bb0>] _raw_spin_unlock_irqrestore+0x80/0xb0 kernel/locking/spinlock.c:198
hardirqs last disabled at (794): [<ffff800085802050>] __raw_write_lock_irq include/linux/rwlock_api_smp.h:211 [inline]
hardirqs last disabled at (794): [<ffff800085802050>] _raw_write_lock_irq+0x70/0x80 kernel/locking/spinlock.c:330
softirqs last  enabled at (580): [<ffff800080232ccc>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (580): [<ffff800080232ccc>] handle_softirqs+0xa9c/0x1050 kernel/softirq.c:650
softirqs last disabled at (485): [<ffff8000800103d4>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---