------------[ cut here ]------------
memory commitment underflow
WARNING: CPU: 1 PID: 18075 at mm/util.c:668 __vm_enough_memory+0x516/0x650 mm/util.c:668
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 18075 Comm: systemd-udevd Not tainted 4.19.211-syzkaller #0
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+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__vm_enough_memory+0x516/0x650 mm/util.c:668
Code: 09 31 ff 89 de e8 aa e9 db ff 84 db 0f 85 a9 fb ff ff e8 6d e8 db ff 48 c7 c7 20 eb 71 88 c6 05 1c 0e 88 09 01 e8 3f 20 6c 06 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14
RSP: 0018:ffff88804c5978d0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10098b2f0c
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000bb0
R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000001
R13: fff800000006439d R14: ffffffff8a009dc0 R15: 0000000000000d2b
 shmem_acct_block mm/shmem.c:183 [inline]
 shmem_inode_acct_block mm/shmem.c:198 [inline]
 shmem_alloc_and_acct_page+0x4ae/0x850 mm/shmem.c:1513
 shmem_getpage_gfp+0x4e9/0x37f0 mm/shmem.c:1797
 shmem_getpage mm/shmem.c:132 [inline]
 shmem_write_begin+0xff/0x1e0 mm/shmem.c:2446
 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f32aee68970
Code: 73 01 c3 48 8b 0d 28 d5 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 99 2d 2c 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 7e 9b 01 00 48 89 04 24
RSP: 002b:00007ffeadb3d568 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000000002c RCX: 00007f32aee68970
RDX: 000000000000002c RSI: 000055b141da28a0 RDI: 0000000000000007
RBP: 000055b141da28a0 R08: 000055b141db2d00 R09: 00007f32afff68c0
R10: 0000000000000073 R11: 0000000000000246 R12: 000000000000002c
R13: 0000000000000001 R14: 000055b141db2c20 R15: 000000000000002c
Kernel Offset: disabled
Rebooting in 86400 seconds..