------------[ cut here ]------------
WARNING: kernel/signal.c:2174 at do_notify_parent+0x37c/0x384 kernel/signal.c:2174, CPU#0: syz.1.2334/8809
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 8809 Comm: syz.1.2334 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)
 r7:82a1e6f8 r6:00000000 r5:8231c0d0 r4:00000001
[<80201af0>] (show_stack) from [<8021e320>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201af0>] (show_stack) from [<8021e320>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e2c4>] (dump_stack_lvl) from [<8021e34c>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:82a1e6f8 r6:00000000 r5:845f0000 r4:82c7bd3c
[<8021e334>] (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 r1:82302bb8 r0:8230a498
[<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 r7:8230b694 r6:ed655de4 r5:845f0000 r4:00000000
[<8025093c>] (warn_slowpath_fmt) from [<80265f80>] (do_notify_parent+0x37c/0x384 kernel/signal.c:2174)
 r10:845f06f4 r9:00000000 r8:ed655e90 r7:845f08d0 r6:00000080 r5:845f0000
 r4:845f0000
[<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:ed655e90 r7:845f08d0 r6:86058540 r5:845f0000 r4:84080000
[<802572f8>] (do_exit) from [<80257fa8>] (do_group_exit+0x40/0x8c kernel/exit.c:1117)
 r7:00000000
[<80257f68>] (do_group_exit) from [<80268fd0>] (get_signal+0xa8c/0xab4 kernel/signal.c:3037)
 r7:00000000 r4:845f0000
[<80268544>] (get_signal) from [<8022a648>] (do_signal arch/arm/kernel/signal.c:579 [inline])
[<80268544>] (get_signal) from [<8022a648>] (do_work_pending+0x11c/0x4e8 arch/arm/kernel/signal.c:619)
 r10:00000000 r9:845f0000 r8:00000000 r7:00000000 r6:00000000 r5:ed655fb0
 r4:845f0000
[<8022a52c>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x24)
Exception stack(0xed655fb0 to 0xed655ff8)
5fa0:                                     00000000 20003440 00000000 20003540
5fc0: 20003580 00000000 00000000 00000078 003462d8 00000000 003d0f00 76f010dc
5fe0: 76f00e60 20003440 00018ee0 00130300 20000010 00000080
 r10:00000000 r9:845f0000 r8:00000000 r7:00000000 r6:00000000 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..