------------[ cut here ]------------
WARNING: kernel/signal.c:2174 at do_notify_parent+0x37c/0x384 kernel/signal.c:2174, CPU#0: syz.4.2391/17872
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 17872 Comm: syz.4.2391 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)
 r7:82a1e6fc r6:00000000 r5:8231adc4 r4:00000001
[<80201af0>] (show_stack) from [<8021e2fc>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201af0>] (show_stack) from [<8021e2fc>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e2a0>] (dump_stack_lvl) from [<8021e328>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:82a1e6fc r6:00000000 r5:87866e40 r4:82c7bd3c
[<8021e310>] (dump_stack) from [<8020260c>] (vpanic+0x114/0x320 kernel/panic.c:650)
[<802024f8>] (vpanic) from [<8020284c>] (trace_suspend_resume+0x0/0x104 kernel/panic.c:787)
 r7:80265f80
[<80202818>] (panic) from [<802506a8>] (check_panic_on_warn kernel/panic.c:524 [inline])
[<80202818>] (panic) from [<802506a8>] (get_taint+0x0/0x1c kernel/panic.c:519)
 r3:82a0b544 r2:00000001 r1:823018ac r0:8230918c
[<80250630>] (check_panic_on_warn) from [<80250824>] (__warn+0x98/0x1ac kernel/panic.c:1103)
[<8025078c>] (__warn) from [<80250ab0>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:1130)
 r8:00000009 r7:8230a388 r6:dfa59ebc r5:87866e40 r4:00000000
[<8025093c>] (warn_slowpath_fmt) from [<80265f80>] (do_notify_parent+0x37c/0x384 kernel/signal.c:2174)
 r10:87867534 r9:00000000 r8:dfa59f68 r7:87867710 r6:00000080 r5:87866e40
 r4:87866e40
[<80265c04>] (do_notify_parent) from [<80257a90>] (exit_notify kernel/exit.c:757 [inline])
[<80265c04>] (do_notify_parent) from [<80257a90>] (do_exit+0x798/0xae4 kernel/exit.c:987)
 r8:dfa59f68 r7:87867710 r6:833eb340 r5:87866e40 r4:83183d40
[<802572f8>] (do_exit) from [<80257f68>] (__do_sys_exit kernel/exit.c:1084 [inline])
[<802572f8>] (do_exit) from [<80257f68>] (do_group_exit+0x0/0x8c kernel/exit.c:1082)
 r7:00000001
[<80257f50>] (sys_exit) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdfa59fa8 to 0xdfa59ff0)
9fa0:                   00000000 20001cc0 00000000 00000000 00000000 00000000
9fc0: 00000000 20001cc0 00000000 00000001 003462d8 00000000 00000001 76f900dc
9fe0: 76f8fe60 76f8fe50 00018f14 00130300
Rebooting in 86400 seconds..