WARNING: CPU: 1 PID: 30379 at kernel/fork.c:677 __mmdrop+0x26a/0x320 /kernel/fork.c:677
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 30379 Comm: syz-executor.0 Not tainted 5.2.0-next-20190718 #41
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack /lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 /lib/dump_stack.c:113
 panic+0x2dc/0x755 /kernel/panic.c:219
 __warn.cold+0x20/0x4c /kernel/panic.c:576
 report_bug+0x263/0x2b0 /lib/bug.c:186
 fixup_bug /arch/x86/kernel/traps.c:179 [inline]
 fixup_bug /arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 /arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 /arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 /arch/x86/entry/entry_64.S:1008
RIP: 0010:__mmdrop+0x26a/0x320 /kernel/fork.c:677
Code: 5f 5d c3 e8 18 7e 2f 00 4c 89 ef e8 60 d7 2b 00 eb d2 e8 09 7e 2f 00 0f 0b e8 02 7e 2f 00 0f 0b e9 fa fd ff ff e8 f6 7d 2f 00 <0f> 0b e9 2b fe ff ff e8 ea 7d 2f 00 4c 89 e7 e8 a2 f7 67 00 e9 85
RSP: 0018:ffff88805850fac0 EFLAGS: 00010293
RAX: ffff888097dee540 RBX: ffff888097dee540 RCX: ffffffff81430bab
RDX: 0000000000000000 RSI: ffffffff814306fa RDI: ffff888097dee970
RBP: ffff88805850fae8 R08: ffff888097dee540 R09: ffffed1010bbfe44
R10: ffffed1010bbfe43 R11: ffff888085dff21f R12: ffff888085dff1c0
R13: ffff888085dff2e8 R14: ffff888085dff710 R15: 0000000000000000
 mmdrop /./include/linux/sched/mm.h:49 [inline]
 __mmput /kernel/fork.c:1074 [inline]
 mmput+0x3f0/0x4d0 /kernel/fork.c:1085
 exit_mm /kernel/exit.c:547 [inline]
 do_exit+0x84e/0x2ea0 /kernel/exit.c:864
 do_group_exit+0x135/0x360 /kernel/exit.c:981
 get_signal+0x47c/0x2500 /kernel/signal.c:2728
 do_signal+0x87/0x1700 /arch/x86/kernel/signal.c:815
 exit_to_usermode_loop+0x286/0x380 /arch/x86/entry/common.c:159
 prepare_exit_to_usermode /arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath /arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x5a9/0x6a0 /arch/x86/entry/common.c:299
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: Bad RIP value.
RSP: 002b:00007efebedb8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffa1 RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000020000140 RSI: 000000004008af03 RDI: 0000000000000003
RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efebedb96d4
R13: 00000000004c46f2 R14: 00000000004d87a0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..