sshd (6039) used greatest stack depth: 15744 bytes left
------------[ cut here ]------------
memory commitment underflow
WARNING: CPU: 1 PID: 6064 at mm/util.c:645 __vm_enough_memory+0x734/0x960 mm/util.c:643
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 6064 Comm: syz-executor831 Not tainted 4.20.0-rc5+ #143
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+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:__vm_enough_memory+0x734/0x960 mm/util.c:643
Code: 60 d3 ff 0f b6 85 28 fe ff ff 84 c0 0f 85 4e fa ff ff e8 ff 5f d3 ff 48 c7 c7 60 99 32 88 c6 05 0c 8a 66 08 01 e8 fc bf 9c 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:ffff8881b2c175a0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 1ffff11036582eb8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165fbe5 RDI: 0000000000000006
RBP: ffff8881b2c17788 R08: ffff8881bff6a140 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8881bff6a140 R12: ffff8881b2c17760
R13: 0000000000000c60 R14: ffffffff8961c660 R15: 0000000000000001
 security_vm_enough_memory_mm+0x9d/0xc0 security/security.c:349
 shmem_acct_size mm/shmem.c:150 [inline]
 __shmem_file_setup.part.50+0x19c/0x2a0 mm/shmem.c:3897
 __shmem_file_setup mm/shmem.c:3894 [inline]
 shmem_file_setup+0x65/0x90 mm/shmem.c:3941
 ashmem_mmap+0x362/0x520 drivers/staging/android/ashmem.c:391
 call_mmap include/linux/fs.h:1862 [inline]
 mmap_region+0xe85/0x1cd0 mm/mmap.c:1786
 do_mmap+0xa22/0x1230 mm/mmap.c:1559
 do_mmap_pgoff include/linux/mm.h:2328 [inline]
 vm_mmap_pgoff+0x213/0x2c0 mm/util.c:350
 ksys_mmap_pgoff+0x4da/0x660 mm/mmap.c:1609
 __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: 0033:0x440e79
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc6d03c178 EFLAGS: 00000216 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440e79
RDX: 0000000020fffffc RSI: 0000000000004000 RDI: 00000000206fd000
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000012 R11: 0000000000000216 R12: 0000000000401d10
R13: 0000000000401da0 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..