------------[ cut here ]------------
WARNING: kernel/signal.c:2174 at do_notify_parent+0x37c/0x384 kernel/signal.c:2174, CPU#1: syz.1.321/4945
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 4945 Comm: syz.1.321 Not tainted syzkaller #0 PREEMPT 
Hardware name: ARM-Versatile Express
Call trace: 
[<80201a14>] (dump_backtrace) from [<80201b08>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:82a1eab8 r6:00000000 r5:8231eaf8 r4:00000001
[<80201af0>] (show_stack) from [<8021e384>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201af0>] (show_stack) from [<8021e384>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e328>] (dump_stack_lvl) from [<8021e3b0>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:82a1eab8 r6:00000000 r5:84778c80 r4:82c7cd3c
[<8021e398>] (dump_stack) from [<8020260c>] (vpanic+0x114/0x320 kernel/panic.c:650)
[<802024f8>] (vpanic) from [<8020284c>] (trace_suspend_resume+0x0/0x104 kernel/panic.c:787)
 r7:80266184
[<80202818>] (panic) from [<80250854>] (check_panic_on_warn kernel/panic.c:524 [inline])
[<80202818>] (panic) from [<80250854>] (get_taint+0x0/0x1c kernel/panic.c:519)
 r3:82a0b544 r2:00000001 r1:823055c0 r0:8230cebc
[<802507dc>] (check_panic_on_warn) from [<802509d0>] (__warn+0x98/0x1ac kernel/panic.c:1103)
[<80250938>] (__warn) from [<80250c5c>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:1130)
 r8:00000009 r7:8230e0b8 r6:ed009ea4 r5:84778c80 r4:00000000
[<80250ae8>] (warn_slowpath_fmt) from [<80266184>] (do_notify_parent+0x37c/0x384 kernel/signal.c:2174)
 r10:84779374 r9:00000000 r8:ed009f50 r7:84779550 r6:00000080 r5:8508a580
 r4:84778c80
[<80265e08>] (do_notify_parent) from [<80257c6c>] (exit_notify kernel/exit.c:758 [inline])
[<80265e08>] (do_notify_parent) from [<80257c6c>] (do_exit+0x7b8/0xb04 kernel/exit.c:988)
 r8:ed009f50 r7:84779550 r6:85aace00 r5:8508a580 r4:84778c80
[<802574b4>] (do_exit) from [<80258188>] (do_group_exit+0x40/0x8c kernel/exit.c:1119)
 r7:860d0540
[<80258148>] (do_group_exit) from [<802581ec>] (__do_sys_exit_group kernel/exit.c:1130 [inline])
[<80258148>] (do_group_exit) from [<802581ec>] (pid_child_should_wake+0x0/0x6c kernel/exit.c:1128)
 r7:000000f8 r4:1ffffc20
[<802581d4>] (sys_exit_group) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xed009fa8 to 0xed009ff0)
9fa0:                   1ffffc20 1feffc20 0000000b 1feffc20 00000000 0018b41c
9fc0: 1ffffc20 1feffc20 00015800 000000f8 003462d8 00000000 00000001 76f960dc
9fe0: 76f95a18 76f95a08 00014998 00130810
Rebooting in 86400 seconds..