Kernel panic - not syncing: corrupted stack end detected inside scheduler CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 4.20.0-rc7+ #359 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_irq+0x87/0x110 kernel/sched/core.c:3699 retint_kernel+0x1b/0x2d RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:94 Code: 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 <55> 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 38 94 RSP: 0018:ffff8881d94294d0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8881d9422580 RBX: ffff8881bb1a8880 RCX: ffffffff81af1443 RDX: 0000000000000000 RSI: ffffffff81af1553 RDI: 0000000000000006 RBP: ffff8881d9429510 R08: ffff8881d9422580 R09: fffff94000d7f99e R10: fffff94000d7f99e R11: ffffea0006bfccf3 R12: dffffc0000000000 R13: 0000000000000014 R14: ffff8881bb1a88d8 R15: 00000000000000db vma_interval_tree_subtree_search mm/interval_tree.c:24 [inline] vma_interval_tree_iter_next+0x1c9/0x240 mm/interval_tree.c:24 rmap_walk_file+0x886/0x1190 mm/rmap.c:1870 rmap_walk+0x22c/0x350 mm/rmap.c:1897 try_to_unmap+0x1f3/0xa40 mm/rmap.c:1716 shrink_page_list+0x72b8/0xc620 mm/vmscan.c:1334 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+0x3df/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+0xa48/0x2df0 mm/page_alloc.c:4185 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 __do_cache_alloc mm/slab.c:3356 [inline] slab_alloc mm/slab.c:3384 [inline] kmem_cache_alloc+0x1f8/0x730 mm/slab.c:3552 mempool_alloc_slab+0x44/0x60 mm/mempool.c:505 mempool_alloc+0x193/0x4a0 mm/mempool.c:385 bio_alloc_bioset+0x3a8/0x700 block/bio.c:489 bio_clone_fast+0x26/0x110 block/bio.c:629 bio_split+0x86/0x260 block/bio.c:1802 blk_bio_segment_split block/blk-merge.c:231 [inline] blk_queue_split+0xa22/0x20f0 block/blk-merge.c:262 blk_mq_make_request+0x2e9/0x2590 block/blk-mq.c:1840 generic_make_request+0x9be/0x15a0 block/blk-core.c:2452 submit_bio+0xba/0x460 block/blk-core.c:2560 ext4_io_submit+0x197/0x230 fs/ext4/page-io.c:356 io_submit_add_bh fs/ext4/page-io.c:396 [inline] ext4_bio_write_page+0xb4d/0x19c3 fs/ext4/page-io.c:506 mpage_submit_page+0x15e/0x270 fs/ext4/inode.c:2237 mpage_map_and_submit_buffers+0x55e/0xa40 fs/ext4/inode.c:2434 mpage_map_and_submit_extent fs/ext4/inode.c:2572 [inline] ext4_writepages+0x2720/0x4180 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_background_flush fs/fs-writeback.c:1826 [inline] wb_do_writeback fs/fs-writeback.c:1914 [inline] wb_workfn+0xd65/0x1790 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..