FAT-fs (loop7): Directory bread(block 2565) failed
FAT-fs (loop7): Directory bread(block 2566) failed
------------[ cut here ]------------
memory commitment underflow
WARNING: CPU: 0 PID: 16316 at mm/util.c:654 __vm_enough_memory+0x753/0x980 mm/util.c:652
FAT-fs (loop7): Directory bread(block 2567) failed
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 16316 Comm: syz-executor5 Not tainted 4.18.0-rc6-next-20180725+ #18
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+0x1c9/0x2b4 lib/dump_stack.c:113
FAT-fs (loop7): Directory bread(block 2568) failed
 panic+0x238/0x4e7 kernel/panic.c:184
FAT-fs (loop7): Directory bread(block 2569) failed
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
FAT-fs (loop7): Directory bread(block 2570) failed
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:996
FAT-fs (loop7): Directory bread(block 2571) failed
RIP: 0010:__vm_enough_memory+0x753/0x980 mm/util.c:652
Code: ec d5 ff 0f b6 85 30 fe ff ff 84 c0 0f 85 2e fa ff ff e8 50 eb d5 ff 48 c7 c7 e0 4b 11 87 c6 05 02 6a df 06 01 e8 5d 83 a0 ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14
RSP: 0018:ffff880191aa7668 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 1ffff10032354ed1 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81637251 RDI: 0000000000000001
RBP: ffff880191aa7850 R08: ffff880197be4000 R09: ffffed003b603ec2
R10: ffffed003b603ec2 R11: ffff8801db01f617 R12: ffff880191aa7828
R13: 0000000000000c6f R14: ffffffff880101c0 R15: 0000000000000021
FAT-fs (loop7): Directory bread(block 2572) failed
 security_vm_enough_memory_mm+0x9d/0xc0 security/security.c:338
 mmap_region+0x3ad/0x1ca0 mm/mmap.c:1716
 do_mmap+0xa10/0x1220 mm/mmap.c:1537
 do_mmap_pgoff include/linux/mm.h:2292 [inline]
 vm_mmap_pgoff+0x213/0x2c0 mm/util.c:369
 ksys_mmap_pgoff+0xf1/0x660 mm/mmap.c:1587
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline]
 __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456a5a
Code: 89 f5 41 54 49 89 fc 55 53 74 35 49 63 e8 48 63 da 4d 89 f9 49 89 e8 4d 63 d6 48 89 da 4c 89 ee 4c 89 e7 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 4e 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 1f 00
RSP: 002b:00007ffc92109888 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000456a5a
RDX: 0000000000000003 RSI: 0000000000021000 RDI: 0000000000000000
RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000020022 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000021000 R14: 0000000000020022 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..