syzbot

[ 3685]     0  3685    17821        1   184320        0             0 sshd
[ 3692]     0  3692     4376        0    32768        0             0 syzkaller025682
[ 3695]     0  3695     4376        0    36864        0             0 syzkaller025682
Kernel panic - not syncing: Out of memory and no killable processes...

CPU: 0 PID: 1 Comm: init Not tainted 4.15.0-rc9+ #212
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 out_of_memory+0xc56/0x1220 mm/oom_kill.c:1076
 __alloc_pages_may_oom mm/page_alloc.c:3395 [inline]
 __alloc_pages_slowpath+0x1d1b/0x2d00 mm/page_alloc.c:4096
 __alloc_pages_nodemask+0x9fb/0xd80 mm/page_alloc.c:4252
 alloc_pages_current+0xb6/0x1e0 mm/mempolicy.c:2036
 alloc_pages include/linux/gfp.h:492 [inline]
 __page_cache_alloc+0x334/0x500 mm/filemap.c:946
 page_cache_read mm/filemap.c:2388 [inline]
 filemap_fault+0xefc/0x1c20 mm/filemap.c:2572
 ext4_filemap_fault+0x82/0xad fs/ext4/inode.c:6164
 __do_fault+0xeb/0x30f mm/memory.c:3202
 do_read_fault mm/memory.c:3612 [inline]
 do_fault mm/memory.c:3712 [inline]
 handle_pte_fault mm/memory.c:3943 [inline]
 __handle_mm_fault+0x1d8f/0x3ce0 mm/memory.c:4067
 handle_mm_fault+0x334/0x8d0 mm/memory.c:4104
 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1430
 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1505
 page_fault+0x4c/0x60 arch/x86/entry/entry_64.S:1260
RIP: 0033:0x7ffa5f1e1410
RSP: 002b:00007ffe0fa32248 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 00007ffe0fa329b0 RCX: 00007ffa5f299dd3
RDX: 00007ffe0fa32280 RSI: 00007ffe0fa323b0 RDI: 0000000000000011
RBP: 00007ffe0fa32b60 R08: 00007ffe0fa32be0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00007ffe0fa32f40 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled