------------[ cut here ]------------
WARNING: CPU: 0 PID: 8164 at mm/util.c:546 __vm_enough_memory+0x41d/0x510 mm/util.c:544
memory commitment underflow[  167.642005] Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8164 Comm: syz-executor.4 Not tainted 4.9.141+ #1
 ffff8801cfc876c0 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff
 ffffffff82a9de00 0000000000000000 0000000000000009 ffff8801cfc87780
 ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f7125>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f7362>] __warn.cold.8+0x2f/0x2f kernel/panic.c:542
 [<ffffffff810dbec2>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff8146a69d>] __vm_enough_memory+0x41d/0x510 mm/util.c:544
 [<ffffffff819e31d6>] security_vm_enough_memory_mm+0x96/0xb0 security/security.c:238
 [<ffffffff81460ce0>] shmem_acct_block mm/shmem.c:174 [inline]
 [<ffffffff81460ce0>] shmem_alloc_and_acct_page mm/shmem.c:1438 [inline]
 [<ffffffff81460ce0>] shmem_getpage_gfp+0x360/0x18f0 mm/shmem.c:1724
 [<ffffffff81462ba4>] shmem_getpage mm/shmem.c:123 [inline]
 [<ffffffff81462ba4>] shmem_write_begin+0xf4/0x1a0 mm/shmem.c:2205
 [<ffffffff8140f5fa>] generic_perform_write+0x28a/0x500 mm/filemap.c:2753
 [<ffffffff81412542>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878
 [<ffffffff81412aaa>] generic_file_write_iter+0x37a/0x620 mm/filemap.c:2906
 [<ffffffff81508347>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff81508347>] __vfs_write+0x3d7/0x580 fs/read_write.c:509
 [<ffffffff8150ab97>] vfs_write+0x187/0x520 fs/read_write.c:557
 [<ffffffff8150e9c9>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff8150e9c9>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..