lowmem_reserve[]: 0 0 3503 3503
Node 0 Normal free:36888kB min:37364kB low:46704kB high:56044kB active_anon:2666824kB inactive_anon:920kB active_file:56kB inactive_file:584kB unevictable:64kB writepending:20kB present:4718592kB managed:3587816kB mlocked:0kB kernel_stack:17120kB pagetables:23208kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB
Node 0 DMA32: 212*4kB (UM) 53*8kB (UM) 28*16kB (UME) 17*32kB (UM) 6*64kB (UM) 1*128kB (M) 1*256kB (U) 2*512kB (UM) 1*1024kB (E) 3*2048kB (UME) 8*4096kB (M) = 43992kB
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 4.20.0-rc7+ #162
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Node 0 Normal: 1673*4kB (UMEH) 1915*8kB (UMEH) 420*16kB (UME) 215*32kB (U) 21*64kB (UM) 2*128kB (M) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 37212kB
Workqueue: writeback wb_workfn (flush-8:0)
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
 panic+0x2ad/0x55c kernel/panic.c:188
376 total pagecache pages
0 pages in swap cache
 schedule_debug kernel/sched/core.c:3285 [inline]
 __schedule+0x1ec6/0x1ed0 kernel/sched/core.c:3394
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
342859 pages reserved
0 pages cma reserved
 preempt_schedule_common+0x1f/0xe0 kernel/sched/core.c:3596
Out of memory: Kill process 9481 (syz-executor5) score 1005 or sacrifice child
Killed process 9481 (syz-executor5) total-vm:70472kB, anon-rss:2204kB, file-rss:32768kB, shmem-rss:0kB
 preempt_schedule+0x4d/0x60 kernel/sched/core.c:3622
oom_reaper: reaped process 9481 (syz-executor5), now anon-rss:0kB, file-rss:32768kB, shmem-rss:0kB
 ___preempt_schedule+0x16/0x18
blkid invoked oom-killer: gfp_mask=0x6280ca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), nodemask=(null), order=0, oom_score_adj=-1000
 __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
blkid cpuset=/ mems_allowed=0
 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]
 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
 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
 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
CPU: 1 PID: 12487 Comm: blkid Not tainted 4.20.0-rc7+ #162
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+0x1d3/0x2c6 lib/dump_stack.c:113
 dump_header+0x27b/0xf72 mm/oom_kill.c:441
 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:953
 out_of_memory+0xa84/0x1430 mm/oom_kill.c:1120
 __alloc_pages_may_oom mm/page_alloc.c:3519 [inline]
 __alloc_pages_slowpath+0x2343/0x2df0 mm/page_alloc.c:4229
 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393
 alloc_pages_vma+0xdd/0x540 mm/mempolicy.c:2070
 alloc_zeroed_user_highpage_movable include/linux/highmem.h:184 [inline]
 do_anonymous_page mm/memory.c:2928 [inline]
 handle_pte_fault mm/memory.c:3763 [inline]
 __handle_mm_fault+0x26ed/0x5670 mm/memory.c:3889
 handle_mm_fault+0x54f/0xc70 mm/memory.c:3926
 do_user_addr_fault arch/x86/mm/fault.c:1423 [inline]
 __do_page_fault+0x5e8/0xe60 arch/x86/mm/fault.c:1489
 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1520
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143
RIP: 0033:0x7fbd444fcc0e
Code: Bad RIP value.
RSP: 002b:00007ffd395b0800 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007fbd43bcaf10 RCX: 0000000000000002
RDX: 000000000001be20 RSI: 000000000001be20 RDI: 00007fbd43bcb000
RBP: 000000000227ceb0 R08: 0000000000000000 R09: 000000000227d116
R10: 0000000000000001 R11: 0000000000000100 R12: 0000000000000001
R13: 0000000000000064 R14: 000000000227d320 R15: 000000000227d0e6
Kernel Offset: disabled
Rebooting in 86400 seconds..