audit: type=1400 audit(1544637607.045:4435): avc: denied { map } for pid=20365 comm="blkid" path="/lib/x86_64-linux-gnu/libuuid.so.1.3.0" dev="sda1" ino=2819 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Kernel panic - not syncing: corrupted stack end detected inside scheduler CPU: 0 PID: 20317 Comm: syz-executor4 Not tainted 4.20.0-rc6+ #151 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+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 preempt_schedule_irq+0xb9/0x140 kernel/sched/core.c:3699 retint_kernel+0x1b/0x2d RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x16/0x20 kernel/kcov.c:188 Code: 48 89 e5 48 8b 4d 08 e8 88 fe ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe bf 05 00 00 00 48 89 e5 48 8b 4d 08 e8 6a fe ff ff <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 f2 48 89 fe bf 07 00 00 00 RSP: 0000:ffff88817b8c1e70 EFLAGS: 00000297 ORIG_RAX: ffffffffffffffda RAX: 0000000000000002 RBX: 1ffff1102f7183d2 RCX: ffffffff81a7af1e RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff88817b8c1e70 R08: ffff8881b32a6600 R09: 0000000000000008 R10: 0000000000000050 R11: ffff8881b32a6600 R12: ffffea00070d8640 R13: ffff88817b8c1f30 R14: 0000000000000001 R15: ffff88817b8c4bc0 rcu_read_lock include/linux/rcupdate.h:608 [inline] page_evictable+0xbe/0x540 mm/vmscan.c:4179 shrink_page_list+0x104b/0xccd0 mm/vmscan.c:1146 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 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+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 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 bvec_alloc+0x12a/0x2d0 block/bio.c:218 bio_alloc_bioset+0x47a/0x700 block/bio.c:509 bio_alloc include/linux/bio.h:393 [inline] mpage_alloc.isra.9+0x3d/0x270 fs/mpage.c:79 do_mpage_readpage+0x178b/0x24d0 fs/mpage.c:306 mpage_readpages+0x56c/0x950 fs/mpage.c:404 blkdev_readpages+0x2c/0x40 fs/block_dev.c:578 read_pages+0x13a/0x680 mm/readahead.c:123 __do_page_cache_readahead+0x499/0x810 mm/readahead.c:209 ra_submit mm/internal.h:66 [inline] do_sync_mmap_readahead mm/filemap.c:2371 [inline] filemap_fault+0xf4e/0x25f0 mm/filemap.c:2447 __do_fault+0x100/0x6b0 mm/memory.c:2996 do_read_fault mm/memory.c:3408 [inline] do_fault mm/memory.c:3534 [inline] handle_pte_fault mm/memory.c:3765 [inline] __handle_mm_fault+0x3ea6/0x5be0 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: 0010:copy_user_generic_unrolled+0x86/0xc0 arch/x86/lib/copy_user_64.S:65 Code: 4c 8b 5e 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 RSP: 0018:ffff88817b8c6f60 EFLAGS: 00010206 RAX: ffffed10375ce784 RBX: 0000000000000018 RCX: 0000000000000003 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffff8881bae73c08 RBP: ffff88817b8c6f98 R08: ffffed10375ce784 R09: ffffed10375ce781 R10: ffffed10375ce783 R11: ffff8881bae73c1f R12: 00000000200001d8 R13: 00000000200001c0 R14: ffff8881bae73c08 R15: 00007ffffffff000 _copy_from_iter_full+0x283/0xce0 lib/iov_iter.c:761 copy_from_iter_full include/linux/uio.h:161 [inline] ip_generic_getfrag+0x100/0x2e0 net/ipv4/ip_output.c:836 __ip6_append_data.isra.46+0x23fe/0x3530 net/ipv6/ip6_output.c:1467 ip6_make_skb+0x380/0x5e0 net/ipv6/ip6_output.c:1775 udpv6_sendmsg+0x2d43/0x36b0 net/ipv6/udp.c:1384 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 sock_write_iter+0x35e/0x5c0 net/socket.c:900 call_write_iter include/linux/fs.h:1857 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457679 Code: Bad RIP value. RSP: 002b:00007fc1ad088c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457679 RDX: 0000000000000018 RSI: 00000000200001c0 RDI: 000000000000000f RBP: 000000000072c220 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc1ad0896d4 R13: 00000000004c5af9 R14: 00000000004da390 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..