kmalloc-512k            2056KB       2056KB
kmalloc-256k             516KB        516KB
kmalloc-128k             520KB        520KB
kmalloc-64k              594KB        660KB
kmalloc-32k             4653KB       4653KB
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 0 PID: 2527 Comm: kworker/u4:4 Not tainted 4.20.0+ #297
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/0x55f kernel/panic.c:189
 schedule_debug kernel/sched/core.c:3285 [inline]
 __schedule+0x1ec6/0x1ed0 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:2721
kmalloc-16k              627KB        676KB
kmalloc-8k              1303KB       1344KB
 shrink_zones mm/vmscan.c:2987 [inline]
 do_try_to_free_pages+0x3df/0x12a0 mm/vmscan.c:3049
 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3265
kmalloc-4k             14458KB      14496KB
kmalloc-2k              7798KB       7803KB
 __perform_reclaim mm/page_alloc.c:3920 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3942 [inline]
 __alloc_pages_slowpath+0xa5a/0x2db0 mm/page_alloc.c:4335
kmalloc-1k              4009KB       4016KB
kmalloc-512             4095KB       4140KB
 __alloc_pages_nodemask+0xa89/0xde0 mm/page_alloc.c:4549
kmalloc-256             2420KB       2430KB
kmalloc-128              759KB        767KB
 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+0x396/0xf00 mm/filemap.c:1615
kmalloc-96              2361KB       3128KB
kmalloc-64              1453KB       1532KB
 find_or_create_page include/linux/pagemap.h:322 [inline]
 grow_dev_page fs/buffer.c:947 [inline]
 grow_buffers fs/buffer.c:1016 [inline]
 __getblk_slow fs/buffer.c:1043 [inline]
 __getblk_gfp+0x3aa/0xd50 fs/buffer.c:1320
 sb_getblk include/linux/buffer_head.h:325 [inline]
 ext4_read_block_bitmap_nowait+0x314/0x1f50 fs/ext4/balloc.c:427
kmalloc-32              1412KB       1830KB
kmalloc-192             1109KB       1480KB
 ext4_read_block_bitmap+0x1f/0x90 fs/ext4/balloc.c:527
 ext4_mb_mark_diskspace_used+0x19e/0x10d0 fs/ext4/mballoc.c:2938
 ext4_mb_new_blocks+0xea5/0x4840 fs/ext4/mballoc.c:4555
kmem_cache               216KB        221KB
 ext4_ext_map_blocks+0x2eef/0x6180 fs/ext4/extents.c:4404
oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz5,mems_allowed=0-1,global_oom,task_memcg=/syz0,task=syz-executor770,pid=8261,uid=0
 ext4_map_blocks+0x8f7/0x1b60 fs/ext4/inode.c:636
 mpage_map_one_extent fs/ext4/inode.c:2480 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2533 [inline]
 ext4_writepages+0x2564/0x4170 fs/ext4/inode.c:2884
 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2335
 __writeback_single_inode+0x20a/0x1660 fs/fs-writeback.c:1316
Out of memory: Kill process 8261 (syz-executor770) score 999 or sacrifice child
Killed process 8261 (syz-executor770) total-vm:17364kB, anon-rss:36kB, file-rss:0kB, shmem-rss:0kB
 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
oom_reaper: reaped process 8261 (syz-executor770), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
 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..