slab_reclaimable:13915 slab_unreclaimable:108851
 mapped:50135 shmem:3240 pagetables:9377 bounce:0
 free:24267 free_pcp:0 free_cma:0
Node 0 active_anon:5462288kB inactive_anon:4400kB active_file:360kB inactive_file:516kB unevictable:0kB isolated(anon):0kB isolated(file):96kB mapped:200540kB dirty:20kB writeback:0kB shmem:12960kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 1 PID: 429 Comm: kworker/u4:3 Not tainted 4.20.0-rc6+ #152
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+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
 schedule_debug kernel/sched/core.c:3285 [inline]
 __schedule+0x21c6/0x21d0 kernel/sched/core.c:3394
Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2818 6321 6321
Node 0 DMA32 free:43820kB min:30052kB low:37564kB high:45076kB active_anon:2791340kB inactive_anon:0kB active_file:56kB inactive_file:4kB unevictable:0kB writepending:0kB present:3129332kB managed:2888780kB mlocked:0kB kernel_stack:3840kB pagetables:12948kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
 preempt_schedule_irq+0xb9/0x140 kernel/sched/core.c:3699
lowmem_reserve[]: 0 0 3503 3503
 retint_kernel+0x1b/0x2d
Node 0 Normal free:37340kB min:37364kB low:46704kB high:56044kB active_anon:2670948kB inactive_anon:4400kB active_file:304kB inactive_file:512kB unevictable:0kB writepending:20kB present:4718592kB managed:3587816kB mlocked:0kB kernel_stack:17024kB pagetables:24560kB bounce:0kB free_pcp:212kB local_pcp:212kB free_cma:0kB
RIP: 0010:__read_once_size include/linux/compiler.h:182 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:101
Code: 5d c3 66 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 48 69 82 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 <83> fa 02 75 20 48 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 48
RSP: 0018:ffff8881d8a291e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
lowmem_reserve[]: 0 0 0 0
RAX: ffff8881d8a22640 RBX: ffff888092c07630 RCX: ffffffff81afe33b
RDX: 0000000000000000 RSI: ffffffff81afe2e5 RDI: 0000000000000007
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
RBP: ffff8881d8a291e0 R08: ffff8881d8a22640 R09: ffffed10382e4355
R10: ffffed10382e4355 R11: ffff8881c1721aab R12: ffff888092c07688
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88809df69268
Node 0 DMA32: 284*4kB (UME) 70*8kB (UME) 11*16kB (UME) 13*32kB (UM) 3*64kB (U) 1*128kB (U) 1*256kB (E) 0*512kB 2*1024kB (ME) 3*2048kB (UME) 8*4096kB (M) = 43824kB
 vma_interval_tree_iter_next+0x95/0x240 mm/interval_tree.c:24
 rmap_walk_file+0x886/0x1190 mm/rmap.c:1870
Node 0 Normal: 19*4kB (UM) 2693*8kB (UMH) 828*16kB (UME) 88*32kB (UE) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 37684kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
3401 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
 rmap_walk+0x22c/0x350 mm/rmap.c:1897
Total swap = 0kB
1965979 pages RAM
 page_referenced+0x7d1/0xaa0 mm/rmap.c:874
0 pages HighMem/MovableOnly
342853 pages reserved
0 pages cma reserved
Out of memory: Kill process 9166 (syz-executor1) score 1005 or sacrifice child
 page_check_references mm/vmscan.c:1024 [inline]
 shrink_page_list+0x4aab/0xccd0 mm/vmscan.c:1264
Killed process 9166 (syz-executor1) total-vm:70472kB, anon-rss:4260kB, file-rss:32768kB, shmem-rss:0kB
 shrink_inactive_list+0x77b/0x1c60 mm/vmscan.c:1963
 shrink_list mm/vmscan.c:2275 [inline]
 shrink_node_memcg+0x78b/0x18f0 mm/vmscan.c:2540
 shrink_node+0x3bc/0x16b0 mm/vmscan.c:2755
 shrink_zones mm/vmscan.c:2987 [inline]
 do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3049
 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3264
 __perform_reclaim mm/page_alloc.c:3773 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3795 [inline]
 __alloc_pages_slowpath+0xa48/0x2de0 mm/page_alloc.c:4185
 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393
 alloc_pages_current+0x173/0x350 mm/mempolicy.c:2106
 alloc_pages include/linux/gfp.h:509 [inline]
 __page_cache_alloc+0x38c/0x5c0 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+0x2724/0x48f0 fs/ext4/extents.c:4404
 ext4_map_blocks+0x8f7/0x1b50 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+0x253a/0x41a0 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..