INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" 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 "1" respawning too fast: disabled for 5 minutes [ 495.141036] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.34' (ECDSA) to the list of known hosts. [ 500.661432] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 500.749735] audit: type=1400 audit(1559993791.488:7): avc: denied { map } for pid=1883 comm="syz-executor114" path="/root/syz-executor114125214" 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 INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes executing program INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 514.527686] ================================================================== [ 514.535270] BUG: KASAN: use-after-free in disk_unblock_events+0x4b/0x50 [ 514.542150] Read of size 8 at addr ffff8881c54d0de8 by task blkid/3826 [ 514.548903] [ 514.550596] CPU: 0 PID: 3826 Comm: blkid Not tainted 4.14.123+ #2 [ 514.557165] Call Trace: [ 514.559745] dump_stack+0xb9/0x10e [ 514.563281] ? disk_unblock_events+0x4b/0x50 [ 514.567678] print_address_description+0x60/0x226 [ 514.572514] ? disk_unblock_events+0x4b/0x50 [ 514.577045] kasan_report.cold+0xae/0x2d5 [ 514.581233] ? disk_unblock_events+0x4b/0x50 [ 514.585722] ? __blkdev_get+0x68f/0xf90 [ 514.589810] ? __blkdev_put+0x6d0/0x6d0 [ 514.593784] ? fsnotify+0x8b0/0x1150 [ 514.597489] ? blkdev_get+0x97/0x8b0 [ 514.601203] ? bd_acquire+0x171/0x2c0 [ 514.605030] ? bd_may_claim+0xd0/0xd0 [ 514.609034] ? lock_downgrade+0x5d0/0x5d0 [ 514.613173] ? lock_acquire+0x10f/0x380 [ 514.617264] ? bd_acquire+0x21/0x2c0 [ 514.620981] ? blkdev_open+0x1cc/0x250 [ 514.624863] ? security_file_open+0x88/0x190 [ 514.629268] ? do_dentry_open+0x44e/0xdf0 [ 514.633677] ? bd_acquire+0x2c0/0x2c0 [ 514.637557] ? vfs_open+0x105/0x230 [ 514.641290] ? path_openat+0xb6b/0x2b70 [ 514.645262] ? path_mountpoint+0x9a0/0x9a0 [ 514.649489] ? trace_hardirqs_on+0x10/0x10 [ 514.653717] ? do_filp_open+0x1a1/0x280 [ 514.657679] ? may_open_dev+0xe0/0xe0 [ 514.661483] ? lock_downgrade+0x5d0/0x5d0 [ 514.665695] ? lock_acquire+0x10f/0x380 [ 514.669660] ? __alloc_fd+0x3f/0x490 [ 514.673363] ? _raw_spin_unlock+0x29/0x40 [ 514.677548] ? __alloc_fd+0x1bf/0x490 [ 514.681447] ? do_sys_open+0x2ca/0x590 [ 514.685326] ? filp_open+0x60/0x60 [ 514.688862] ? do_syscall_64+0x43/0x510 [ 514.692818] ? do_sys_open+0x590/0x590 [ 514.696730] ? do_syscall_64+0x19b/0x510 [ 514.700788] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 514.706146] [ 514.707803] Allocated by task 3823: [ 514.711471] kasan_kmalloc.part.0+0x4f/0xd0 [ 514.715807] kmem_cache_alloc_trace+0x126/0x310 [ 514.720553] alloc_disk_node+0x5b/0x3d0 [ 514.724620] [ 514.726232] Freed by task 3826: [ 514.729497] kasan_slab_free+0xb0/0x190 [ 514.733498] kfree+0xf5/0x310 [ 514.736614] device_release+0xf4/0x1a0 [ 514.740516] [ 514.742139] The buggy address belongs to the object at ffff8881c54d0880 [ 514.742139] which belongs to the cache kmalloc-2048 of size 2048 [ 514.755068] The buggy address is located 1384 bytes inside of [ 514.755068] 2048-byte region [ffff8881c54d0880, ffff8881c54d1080) [ 514.767097] The buggy address belongs to the page: [ 514.772016] page:ffffea0007153400 count:1 mapcount:0 mapping: (null) index:0xffff8881c54d7700 compound_mapcount: 0 [ 514.783331] flags: 0x4000000000010200(slab|head) [ 514.788081] raw: 4000000000010200 0000000000000000 ffff8881c54d7700 00000001800f0006 [ 514.796086] raw: 0000000000000000 0000000100000001 ffff8881da802800 0000000000000000 [ 514.803952] page dumped because: kasan: bad access detected [ 514.809641] [ 514.811242] Memory state around the buggy address: [ 514.816154] ffff8881c54d0c80: 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 [ 514.823670] ffff8881c54d0d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 514.831195] >ffff8881c54d0d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 514.838659] ^ [ 514.845485] ffff8881c54d0e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 514.852910] ffff8881c54d0e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 514.860253] ================================================================== [ 514.867702] Disabling lock debugging due to kernel taint executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 514.875281] Kernel panic - not syncing: panic_on_warn set ... [ 514.875281] [ 514.883076] CPU: 0 PID: 3826 Comm: blkid Tainted: G B 4.14.123+ #2 [ 514.890505] Call Trace: [ 514.893227] dump_stack+0xb9/0x10e [ 514.897273] panic+0x1d9/0x3c2 [ 514.900461] ? add_taint.cold+0x16/0x16 [ 514.904467] ? disk_unblock_events+0x4b/0x50 [ 514.908912] ? ___preempt_schedule+0x16/0x18 [ 514.913518] ? disk_unblock_events+0x4b/0x50 [ 514.918206] kasan_end_report+0x43/0x49 [ 514.922202] kasan_report.cold+0xca/0x2d5 [ 514.926342] ? disk_unblock_events+0x4b/0x50 [ 514.930812] ? __blkdev_get+0x68f/0xf90 [ 514.934773] ? __blkdev_put+0x6d0/0x6d0 [ 514.938733] ? fsnotify+0x8b0/0x1150 [ 514.942446] ? blkdev_get+0x97/0x8b0 [ 514.946155] ? bd_acquire+0x171/0x2c0 [ 514.949940] ? bd_may_claim+0xd0/0xd0 [ 514.953825] ? lock_downgrade+0x5d0/0x5d0 [ 514.958042] ? lock_acquire+0x10f/0x380 [ 514.962149] ? bd_acquire+0x21/0x2c0 [ 514.965854] ? blkdev_open+0x1cc/0x250 [ 514.969745] ? security_file_open+0x88/0x190 [ 514.974138] ? do_dentry_open+0x44e/0xdf0 [ 514.978487] ? bd_acquire+0x2c0/0x2c0 [ 514.982320] ? vfs_open+0x105/0x230 [ 514.985969] ? path_openat+0xb6b/0x2b70 [ 514.989925] ? path_mountpoint+0x9a0/0x9a0 [ 514.994319] ? trace_hardirqs_on+0x10/0x10 [ 514.998547] ? do_filp_open+0x1a1/0x280 [ 515.002501] ? may_open_dev+0xe0/0xe0 [ 515.006297] ? lock_downgrade+0x5d0/0x5d0 [ 515.010499] ? lock_acquire+0x10f/0x380 [ 515.014463] ? __alloc_fd+0x3f/0x490 [ 515.018291] ? _raw_spin_unlock+0x29/0x40 [ 515.022469] ? __alloc_fd+0x1bf/0x490 [ 515.026268] ? do_sys_open+0x2ca/0x590 [ 515.030172] ? filp_open+0x60/0x60 [ 515.033699] ? do_syscall_64+0x43/0x510 [ 515.037696] ? do_sys_open+0x590/0x590 [ 515.041568] ? do_syscall_64+0x19b/0x510 [ 515.045618] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 515.051360] Kernel Offset: 0x33e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 515.062396] Rebooting in 86400 seconds..