INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes [ 409.347788] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. [ 415.099917] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 415.185571] audit: type=1400 audit(1549087757.108:7): avc: denied { map } for pid=1809 comm="syz-executor540" path="/root/syz-executor540481218" dev="sda1" ino=16461 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 423.224234] ================================================================== [ 423.231646] BUG: KASAN: use-after-free in disk_unblock_events+0x4b/0x50 [ 423.238375] Read of size 8 at addr ffff8881c4c0eb68 by task blkid/2576 [ 423.245018] [ 423.246628] CPU: 0 PID: 2576 Comm: blkid Not tainted 4.14.97+ #1 [ 423.252753] Call Trace: [ 423.255325] dump_stack+0xb9/0x10e [ 423.258841] ? disk_unblock_events+0x4b/0x50 [ 423.263227] print_address_description+0x60/0x226 [ 423.268047] ? disk_unblock_events+0x4b/0x50 [ 423.272433] kasan_report.cold+0x88/0x2a5 [ 423.276583] ? disk_unblock_events+0x4b/0x50 [ 423.280967] ? __blkdev_get+0x68f/0xf90 [ 423.284924] ? __blkdev_put+0x6d0/0x6d0 [ 423.288879] ? fsnotify+0x824/0x10c0 [ 423.292572] ? blkdev_get+0x97/0x8b0 [ 423.296265] ? bd_acquire+0x171/0x2c0 [ 423.300042] ? bd_may_claim+0xd0/0xd0 [ 423.303820] ? lock_downgrade+0x5d0/0x5d0 [ 423.307942] ? lock_acquire+0x10f/0x380 [ 423.311893] ? bd_acquire+0x21/0x2c0 [ 423.315589] ? blkdev_open+0x1cc/0x250 [ 423.319453] ? security_file_open+0x88/0x190 [ 423.323849] ? do_dentry_open+0x41b/0xd60 [ 423.327974] ? bd_acquire+0x2c0/0x2c0 [ 423.331761] ? vfs_open+0x105/0x230 [ 423.335379] ? path_openat+0xb6b/0x2b70 [ 423.339351] ? path_mountpoint+0x9a0/0x9a0 [ 423.343568] ? trace_hardirqs_on+0x10/0x10 [ 423.347783] ? do_filp_open+0x1a1/0x280 [ 423.351734] ? may_open_dev+0xe0/0xe0 [ 423.355527] ? lock_downgrade+0x5d0/0x5d0 [ 423.359648] ? lock_acquire+0x10f/0x380 [ 423.363601] ? __alloc_fd+0x3f/0x490 [ 423.367297] ? _raw_spin_unlock+0x29/0x40 [ 423.371418] ? __alloc_fd+0x1bf/0x490 [ 423.375202] ? do_sys_open+0x2ca/0x590 [ 423.379064] ? filp_open+0x60/0x60 [ 423.382585] ? do_syscall_64+0x43/0x4b0 [ 423.386542] ? do_sys_open+0x590/0x590 [ 423.390404] ? do_syscall_64+0x19b/0x4b0 [ 423.394444] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 423.399843] [ 423.401457] Allocated by task 2559: [ 423.405064] kasan_kmalloc.part.0+0x4f/0xd0 [ 423.409361] kmem_cache_alloc_trace+0x126/0x310 [ 423.414003] alloc_disk_node+0x5b/0x3d0 [ 423.417995] [ 423.419606] Freed by task 2576: [ 423.422863] kasan_slab_free+0xb0/0x190 [ 423.426810] kfree+0xf5/0x310 [ 423.429892] device_release+0xf4/0x1a0 [ 423.433749] [ 423.435355] The buggy address belongs to the object at ffff8881c4c0e600 [ 423.435355] which belongs to the cache kmalloc-2048 of size 2048 [ 423.448323] The buggy address is located 1384 bytes inside of [ 423.448323] 2048-byte region [ffff8881c4c0e600, ffff8881c4c0ee00) [ 423.460350] The buggy address belongs to the page: [ 423.465261] page:ffffea0007130200 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 423.475215] flags: 0x4000000000008100(slab|head) [ 423.479963] raw: 4000000000008100 0000000000000000 0000000000000000 00000001800f000f [ 423.487824] raw: dead000000000100 dead000000000200 ffff8881d6402800 0000000000000000 [ 423.495680] page dumped because: kasan: bad access detected [ 423.501422] [ 423.503038] Memory state around the buggy address: [ 423.507947] ffff8881c4c0ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 423.515283] ffff8881c4c0ea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 423.522617] >ffff8881c4c0eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 423.529950] ^ [ 423.536678] ffff8881c4c0eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 423.544014] ffff8881c4c0ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 423.551345] ================================================================== [ 423.558675] Disabling lock debugging due to kernel taint [ 423.565474] Kernel panic - not syncing: panic_on_warn set ... [ 423.565474] executing program executing program executing program executing program executing program executing program executing program [ 423.572849] CPU: 0 PID: 2576 Comm: blkid Tainted: G B 4.14.97+ #1 [ 423.580184] Call Trace: [ 423.582752] dump_stack+0xb9/0x10e [ 423.586270] panic+0x1d9/0x3c2 [ 423.589439] ? add_taint.cold+0x16/0x16 [ 423.593389] ? disk_unblock_events+0x4b/0x50 [ 423.597770] ? ___preempt_schedule+0x16/0x18 [ 423.602152] ? disk_unblock_events+0x4b/0x50 [ 423.606533] kasan_end_report+0x43/0x49 [ 423.610482] kasan_report.cold+0xa4/0x2a5 [ 423.614613] ? disk_unblock_events+0x4b/0x50 [ 423.618997] ? __blkdev_get+0x68f/0xf90 [ 423.622949] ? __blkdev_put+0x6d0/0x6d0 [ 423.626896] ? fsnotify+0x824/0x10c0 [ 423.630587] ? blkdev_get+0x97/0x8b0 [ 423.634276] ? bd_acquire+0x171/0x2c0 [ 423.638050] ? bd_may_claim+0xd0/0xd0 [ 423.641826] ? lock_downgrade+0x5d0/0x5d0 [ 423.645959] ? lock_acquire+0x10f/0x380 [ 423.649922] ? bd_acquire+0x21/0x2c0 [ 423.653615] ? blkdev_open+0x1cc/0x250 [ 423.657475] ? security_file_open+0x88/0x190 [ 423.661866] ? do_dentry_open+0x41b/0xd60 [ 423.665985] ? bd_acquire+0x2c0/0x2c0 [ 423.669763] ? vfs_open+0x105/0x230 [ 423.673368] ? path_openat+0xb6b/0x2b70 [ 423.677316] ? path_mountpoint+0x9a0/0x9a0 [ 423.681527] ? trace_hardirqs_on+0x10/0x10 [ 423.685740] ? do_filp_open+0x1a1/0x280 [ 423.689686] ? may_open_dev+0xe0/0xe0 [ 423.693461] ? lock_downgrade+0x5d0/0x5d0 [ 423.697579] ? lock_acquire+0x10f/0x380 [ 423.701553] ? __alloc_fd+0x3f/0x490 [ 423.705243] ? _raw_spin_unlock+0x29/0x40 [ 423.709362] ? __alloc_fd+0x1bf/0x490 [ 423.713140] ? do_sys_open+0x2ca/0x590 [ 423.717004] ? filp_open+0x60/0x60 [ 423.720524] ? do_syscall_64+0x43/0x4b0 [ 423.724471] ? do_sys_open+0x590/0x590 [ 423.728343] ? do_syscall_64+0x19b/0x4b0 [ 423.732392] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 423.738112] Kernel Offset: 0x2c400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 423.749007] Rebooting in 86400 seconds..