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WARNING: kernel/signal.c:2174 at do_notify_parent+0x904/0xa50 kernel/signal.c:2261, CPU#0: syz.9.3192/13223
Modules linked in:
CPU: 0 UID: 0 PID: 13223 Comm: syz.9.3192 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
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 : ffff8000a00d7920
x29: ffff8000a00d7a10 x28: ffff000017825bd0 x27: ffff000017825640
x26: ffff000017825c40 x25: 1fffe00002f04b7a x24: ffff800087639000
x23: ffff0000142d9d10 x22: 1ffff0001401af26 x21: 0000000000000080
x20: 1fffe00002f04bf0 x19: ffff8000a00d79a0 x18: 0000000000000801
x17: 0000000000000000 x16: ffff000017826ccc x15: 0000000000000000
x14: 1fffe0000d3f9eb9 x13: ffff000069fcf5c8 x12: ffff70001401af37
x11: 1ffff0001401af36 x10: ffff70001401af36 x9 : dfff800000000000
x8 : 0000000000000003 x7 : 00000000f200f2f2 x6 : 000000000000f2f2
x5 : dfff800000000000 x4 : 00000000f3f3f3f3 x3 : 0000000000000080
x2 : ffff70001401af26 x1 : ffff000017825640 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_group_exit+0xa4/0x208 kernel/exit.c:1117
 get_signal+0x1b30/0x1f0c kernel/signal.c:3037
 arch_do_signal_or_restart+0x1d4/0x6c0 arch/arm64/kernel/signal.c:1633
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x140/0x1c8 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:224 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:86 [inline]
 el0_da+0x238/0x280 arch/arm64/kernel/entry-common.c:540
 el0t_64_sync_handler+0xd0/0xe4 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
irq event stamp: 48282
hardirqs last  enabled at (48281): [<ffff8000857fd870>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline]
hardirqs last  enabled at (48281): [<ffff8000857fd870>] _raw_spin_unlock_irqrestore+0x80/0xb0 kernel/locking/spinlock.c:198
hardirqs last disabled at (48282): [<ffff8000857fdd10>] __raw_write_lock_irq include/linux/rwlock_api_smp.h:211 [inline]
hardirqs last disabled at (48282): [<ffff8000857fdd10>] _raw_write_lock_irq+0x70/0x80 kernel/locking/spinlock.c:330
softirqs last  enabled at (48244): [<ffff800080232ccc>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (48244): [<ffff800080232ccc>] handle_softirqs+0xa9c/0x1050 kernel/softirq.c:650
softirqs last disabled at (48237): [<ffff8000800103d4>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---