kmem_cache               219KB        221KB
Out of memory: Kill process 7773 (dhclient) score 0 or sacrifice child
Killed process 7773 (dhclient) total-vm:9972kB, anon-rss:2292kB, file-rss:0kB, shmem-rss:0kB
syz-executor046 (8036) used greatest stack depth: 7688 bytes left
syz-executor046 (8038) used greatest stack depth: 7400 bytes left
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 1 PID: 3072 Comm: kworker/u4:5 Not tainted 4.20.0 #387
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/0x55c kernel/panic.c:188
 schedule_debug kernel/sched/core.c:3285 [inline]
 __schedule+0x1ec6/0x1ed0 kernel/sched/core.c:3394
 preempt_schedule_common+0x1f/0xe0 kernel/sched/core.c:3596
 preempt_schedule+0x4d/0x60 kernel/sched/core.c:3622
 ___preempt_schedule+0x16/0x18
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
 _raw_spin_unlock_irq+0x75/0x80 kernel/locking/spinlock.c:192
 spin_unlock_irq include/linux/spinlock.h:379 [inline]
 start_flush_work kernel/workqueue.c:2881 [inline]
 __flush_work+0x45e/0x9b0 kernel/workqueue.c:2916
 flush_work+0x17/0x20 kernel/workqueue.c:2938
 drain_all_pages+0x418/0x680 mm/page_alloc.c:2679
 __alloc_pages_direct_reclaim mm/page_alloc.c:3809 [inline]
 __alloc_pages_slowpath+0xb61/0x2df0 mm/page_alloc.c:4185
 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393
 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:1554
 find_or_create_page include/linux/pagemap.h:322 [inline]
 ext4_mb_load_buddy_gfp+0xa80/0x1e70 fs/ext4/mballoc.c:1194
 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+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+0x2573/0x4180 fs/ext4/inode.c:2884
 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2328
 __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..