WARNING: CPU: 1 PID: 6658 at kernel/fork.c:677 __mmdrop+0x26a/0x320 /kernel/fork.c:677
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 6658 Comm: syz-executor.5 Not tainted 5.2.0+ #62
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 98 7d 2f 00 4c 89 ef e8 e0 d6 2b 00 eb d2 e8 89 7d 2f 00 0f 0b e8 82 7d 2f 00 0f 0b e9 fa fd ff ff e8 76 7d 2f 00 <0f> 0b e9 2b fe ff ff e8 6a 7d 2f 00 4c 89 e7 e8 22 c5 67 00 e9 85
RSP: 0018:ffff88805ecdfab0 EFLAGS: 00010293
RAX: ffff88805b5d46c0 RBX: ffff88805b5d46c0 RCX: ffffffff8143086b
RDX: 0000000000000000 RSI: ffffffff814303ba RDI: ffff88805b5d4af0
RBP: ffff88805ecdfad8 R08: ffff88805b5d46c0 R09: ffffed1010b5d464
R10: ffffed1010b5d463 R11: ffff888085aea31f R12: ffff888085aea2c0
R13: ffff888085aea3e8 R14: ffff888085aea810 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_32_irqs_on /arch/x86/entry/common.c:347 [inline]
 do_fast_syscall_32+0xb87/0xdb3 /arch/x86/entry/common.c:403
 entry_SYSENTER_compat+0x70/0x7f /arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f319c9
Code: Bad RIP value.
RSP: 002b:00000000f5ceb0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 000000004028af11
RDX: 00000000200023c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..