memory commitment underflow
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1842 at mm/util.c:604 __vm_enough_memory.cold+0x18/0x59 mm/util.c:604
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 1842 Comm: syz-executor.4 Not tainted 4.14.137+ #29
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 panic+0x1ea/0x3d3 kernel/panic.c:182
 __warn.cold+0x2f/0x3a kernel/panic.c:546
 report_bug+0x20a/0x248 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bf/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:__vm_enough_memory.cold+0x18/0x59 mm/util.c:604
RSP: 0018:ffff88819e617bd8 EFLAGS: 00010286
RAX: 000000000000001b RBX: 0000000000000021 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8881cb87a000 RDI: ffffed1033cc2f6d
RBP: ffff8881d0adc780 R08: 000000000000001b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8ed3b200 R14: fff80000000655d3 R15: 0000000000000c96
 dup_mmap kernel/fork.c:651 [inline]
 dup_mm kernel/fork.c:1211 [inline]
 copy_mm kernel/fork.c:1266 [inline]
 copy_process.part.0+0x2725/0x68b0 kernel/fork.c:1789
 copy_process kernel/fork.c:1598 [inline]
 _do_fork+0x193/0xce0 kernel/fork.c:2094
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457dfa
RSP: 002b:00007ffe02b04810 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe02b04810 RCX: 0000000000457dfa
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe02b04850 R08: 0000000000000001 R09: 0000000001b07940
R10: 0000000001b07c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffe02b048a0
Kernel Offset: 0xb800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..