WARNING: CPU: 1 PID: 8822 at kernel/fork.c:673 __mmdrop+0x1ec/0x290 /kernel/fork.c:671
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8822 Comm: syz-executor.2 Not tainted 5.2.0-rc2+ #1
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+0x113/0x167 /lib/dump_stack.c:113
 panic+0x212/0x4cb /kernel/panic.c:219
 __warn.cold.8+0x1b/0x38 /kernel/panic.c:576
 report_bug+0x1a4/0x200 /lib/bug.c:186
 fixup_bug /arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x11b/0x200 /arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 /arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 /arch/x86/entry/entry_64.S:986
RIP: 0010:__mmdrop+0x1ec/0x290 /kernel/fork.c:673
Code: d8 00 00 00 74 18 48 8b 3d a1 07 f3 07 48 89 de e8 19 4b 5b 00 5b 41 5c 41 5d 41 5e 5d c3 4c 89 e7 e8 48 c3 26 00 eb de 0f 0b <0f> 0b e9 9c fe ff ff 0f 0b e9 5b fe ff ff 4c 89 e7 e8 7e 91 5b 00
RSP: 0018:ffff88808ea57a90 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88808c61d400 RCX: ffffffff813c652f
RDX: 1ffff11013088c8d RSI: 0000000000000004 RDI: ffff888098446468
RBP: ffff88808ea57ab0 R08: ffffed10118c3a8c R09: ffffed10118c3a8b
R10: ffffed10118c3a8b R11: ffff88808c61d45f R12: ffff888098446040
R13: ffff8880a4109340 R14: 0000000000000310 R15: ffff88808c61d400
 mmdrop /./include/linux/sched/mm.h:49 [inline]
 __mmput /kernel/fork.c:1069 [inline]
 mmput+0x321/0x3f0 /kernel/fork.c:1080
 exit_mm /kernel/exit.c:547 [inline]
 do_exit+0x934/0x2e80 /kernel/exit.c:864
 do_group_exit+0xf4/0x2f0 /kernel/exit.c:981
 get_signal+0x339/0x1b70 /kernel/signal.c:2638
 do_signal+0x87/0x1940 /arch/x86/kernel/signal.c:815
 exit_to_usermode_loop+0x114/0x200 /arch/x86/entry/common.c:164
 prepare_exit_to_usermode /arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath /arch/x86/entry/common.c:279 [inline]
 do_syscall_64+0x447/0x530 /arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459819
Code: Bad RIP value.
RSP: 002b:00007f701c712c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000459819
RDX: 00000000200023c0 RSI: 000000004028af11 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f701c7136d4
R13: 00000000004c4722 R14: 00000000004d87d0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..