syz-executor619 (16560) used greatest stack depth: 14200 bytes left syz-executor619 (16556) used greatest stack depth: 13576 bytes left syz-executor619 (16557) used greatest stack depth: 6792 bytes left Kernel panic - not syncing: corrupted stack end detected inside scheduler CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.20.0+ #389 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 schedule+0xfe/0x460 kernel/sched/core.c:3516 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 i_mmap_lock_read include/linux/fs.h:511 [inline] rmap_walk_file+0xa7e/0x1190 mm/rmap.c:1869 rmap_walk+0x22c/0x350 mm/rmap.c:1897 page_referenced+0x7d1/0xaa0 mm/rmap.c:874 page_check_references mm/vmscan.c:1025 [inline] shrink_page_list+0x4a05/0xc620 mm/vmscan.c:1265 shrink_inactive_list+0x77b/0x1c60 mm/vmscan.c:1964 shrink_list mm/vmscan.c:2276 [inline] shrink_node_memcg+0x78b/0x18f0 mm/vmscan.c:2541 shrink_node+0x3bc/0x16b0 mm/vmscan.c:2756 shrink_zones mm/vmscan.c:2988 [inline] do_try_to_free_pages+0x3df/0x1290 mm/vmscan.c:3050 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3265 __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_alloc include/linux/bio.h:393 [inline] submit_bh_wbc+0x14b/0x790 fs/buffer.c:3061 __block_write_full_page+0x931/0x1490 fs/buffer.c:1765 block_write_full_page+0x221/0x270 fs/buffer.c:2955 blkdev_writepage+0x24/0x30 fs/block_dev.c:567 __writepage+0x69/0xe0 mm/page-writeback.c:2289 write_cache_pages+0xc91/0x1e20 mm/page-writeback.c:2230 generic_writepages+0xda/0x150 mm/page-writeback.c:2313 blkdev_writepages+0x1d/0x30 fs/block_dev.c:1957 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..