audit: type=1400 audit(1546208601.574:36): avc:  denied  { map } for  pid=8387 comm="syz-executor241" path="/root/syz-executor241998684" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 1 PID: 82 Comm: kworker/u4:3 Not tainted 4.20.0+ #176
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/0x55f kernel/panic.c:189
 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_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
 _raw_spin_unlock_irqrestore+0xbb/0xd0 kernel/locking/spinlock.c:184
 __debug_check_no_obj_freed lib/debugobjects.c:798 [inline]
 debug_check_no_obj_freed+0x305/0x58d lib/debugobjects.c:817
 free_pages_prepare mm/page_alloc.c:1072 [inline]
 free_pcp_prepare mm/page_alloc.c:1086 [inline]
 free_unref_page_prepare mm/page_alloc.c:2819 [inline]
 free_unref_page_list+0x3c4/0x11e0 mm/page_alloc.c:2888
 shrink_page_list+0x6b62/0xc2e0 mm/vmscan.c:1499
 shrink_inactive_list+0x77b/0x1c60 mm/vmscan.c:1961
 shrink_list mm/vmscan.c:2273 [inline]
 shrink_node_memcg+0x7a8/0x19a0 mm/vmscan.c:2538
 shrink_node+0x3e1/0x17f0 mm/vmscan.c:2753
 shrink_zones mm/vmscan.c:2987 [inline]
 do_try_to_free_pages+0x3df/0x12a0 mm/vmscan.c:3049
 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3265
 __perform_reclaim mm/page_alloc.c:3920 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3942 [inline]
 __alloc_pages_slowpath+0xa5a/0x2db0 mm/page_alloc.c:4335
 __alloc_pages_nodemask+0xa89/0xde0 mm/page_alloc.c:4549
 __alloc_pages include/linux/gfp.h:473 [inline]
 __alloc_pages_node include/linux/gfp.h:486 [inline]
 kmem_getpages mm/slab.c:1396 [inline]
 cache_grow_begin+0x91/0x8c0 mm/slab.c:2664
 fallback_alloc+0x203/0x2e0 mm/slab.c:3206
 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3274
 __do_cache_alloc mm/slab.c:3343 [inline]
 slab_alloc mm/slab.c:3371 [inline]
 kmem_cache_alloc+0x1f6/0x730 mm/slab.c:3539
 mempool_alloc_slab+0x44/0x60 mm/mempool.c:505
 mempool_alloc+0x193/0x4a0 mm/mempool.c:385
 bio_alloc_bioset+0x39c/0x6f0 block/bio.c:489
 bio_alloc include/linux/bio.h:393 [inline]
 io_submit_init_bio fs/ext4/page-io.c:374 [inline]
 io_submit_add_bh fs/ext4/page-io.c:399 [inline]
 ext4_bio_write_page+0x114f/0x1a37 fs/ext4/page-io.c:506
 mpage_submit_page+0x15e/0x270 fs/ext4/inode.c:2237
 mpage_process_page_bufs+0x50a/0x600 fs/ext4/inode.c:2348
 mpage_prepare_extent_to_map+0xea5/0x19c0 fs/ext4/inode.c:2710
 ext4_writepages+0x1405/0x4170 fs/ext4/inode.c:2837
 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2335
 __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..