0 pages cma reserved
oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0-1,global_oom,task_memcg=/syz2,task=syz-executor2,pid=11480,uid=0
Out of memory: Kill process 11480 (syz-executor2) score 1005 or sacrifice child
Killed process 11480 (syz-executor2) total-vm:70664kB, anon-rss:2204kB, file-rss:32768kB, shmem-rss:0kB
syz-executor1 (27839) used greatest stack depth: 6032 bytes left
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 1 PID: 452 Comm: kworker/u4:3 Not tainted 4.20.0-rc7-next-20181224 #189
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113
 panic+0x2ad/0x632 kernel/panic.c:214
 schedule_debug kernel/sched/core.c:3285 [inline]
 __schedule+0x1ecf/0x1ed0 kernel/sched/core.c:3394
 preempt_schedule_notrace+0x70/0x140 kernel/sched/core.c:3670
 ___preempt_schedule_notrace+0x16/0x31
 rcu_is_watching+0x23/0x30 kernel/rcu/tree.c:933
 rcu_read_lock+0x43/0x70 include/linux/rcupdate.h:608
 mem_cgroup_iter+0x208/0x1160 mm/memcontrol.c:934
 shrink_node+0x35e/0x17f0 mm/vmscan.c:2740
 shrink_zones mm/vmscan.c:3006 [inline]
 do_try_to_free_pages+0x3df/0x12a0 mm/vmscan.c:3068
 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3284
 __perform_reclaim mm/page_alloc.c:4037 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4059 [inline]
 __alloc_pages_slowpath+0xa5a/0x2d90 mm/page_alloc.c:4452
 __alloc_pages_nodemask+0xa89/0xde0 mm/page_alloc.c:4666
 alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2106
 alloc_pages include/linux/gfp.h:509 [inline]
 __page_cache_alloc+0x38c/0x5b0 mm/filemap.c:924
 pagecache_get_page+0x396/0xf30 mm/filemap.c:1618
 find_or_create_page include/linux/pagemap.h:323 [inline]
 ext4_mb_load_buddy_gfp+0xddf/0x1e70 fs/ext4/mballoc.c:1158
 ext4_mb_load_buddy fs/ext4/mballoc.c:1241 [inline]
 ext4_mb_find_by_goal+0x2fa/0x1040 fs/ext4/mballoc.c:1832
 ext4_mb_regular_allocator+0x282/0x1590 fs/ext4/mballoc.c:2118
 ext4_mb_new_blocks+0x1de3/0x4840 fs/ext4/mballoc.c:4538
 ext4_ext_map_blocks+0x2eef/0x6180 fs/ext4/extents.c:4404
 ext4_map_blocks+0x8ce/0x1b40 fs/ext4/inode.c:636
 mpage_map_one_extent fs/ext4/inode.c:2479 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2532 [inline]
 ext4_writepages+0x2598/0x4190 fs/ext4/inode.c:2883
 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2335
 __writeback_single_inode+0x20a/0x1660 fs/fs-writeback.c:1316
 writeback_sb_inodes+0x71f/0x1210 fs/fs-writeback.c:1580
 __writeback_inodes_wb+0x1b9/0x340 fs/fs-writeback.c:1649
 wb_writeback+0xa73/0xfc0 fs/fs-writeback.c:1758
 wb_check_start_all fs/fs-writeback.c:1882 [inline]
 wb_do_writeback fs/fs-writeback.c:1908 [inline]
 wb_workfn+0xee9/0x1790 fs/fs-writeback.c:1942
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..