Warning: Permanently added '10.128.0.77' (ECDSA) to the list of known hosts. [ 71.596262] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 71.696854] audit: type=1400 audit(1573238775.062:7): avc: denied { map } for pid=1800 comm="syz-executor804" path="/root/syz-executor804498584" dev="sda1" ino=16481 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.075253] ================================================================== [ 92.082706] BUG: KASAN: use-after-free in disk_unblock_events+0x4b/0x50 [ 92.089441] Read of size 8 at addr ffff8881d2619668 by task blkid/5376 [ 92.096156] [ 92.097777] CPU: 0 PID: 5376 Comm: blkid Not tainted 4.14.152+ #0 [ 92.103986] Call Trace: [ 92.106563] dump_stack+0xca/0x134 [ 92.110098] ? disk_unblock_events+0x4b/0x50 [ 92.114488] ? disk_unblock_events+0x4b/0x50 [ 92.118878] print_address_description+0x60/0x226 executing program executing program executing program executing program executing program executing program executing program [ 92.123704] ? disk_unblock_events+0x4b/0x50 [ 92.128101] ? disk_unblock_events+0x4b/0x50 [ 92.132580] __kasan_report.cold+0x1a/0x41 [ 92.136801] ? disk_unblock_events+0x4b/0x50 [ 92.141196] disk_unblock_events+0x4b/0x50 [ 92.145418] __blkdev_get+0x68f/0xf90 [ 92.149227] ? __blkdev_put+0x6d0/0x6d0 [ 92.153193] ? fsnotify+0x8b0/0x1150 [ 92.156913] blkdev_get+0x97/0x8b0 [ 92.160462] ? bd_acquire+0x171/0x2c0 [ 92.164270] ? bd_may_claim+0xd0/0xd0 [ 92.168077] ? lock_downgrade+0x630/0x630 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.172233] ? lock_acquire+0x12b/0x360 [ 92.176222] ? bd_acquire+0x21/0x2c0 [ 92.179953] ? do_raw_spin_unlock+0x50/0x220 [ 92.184386] blkdev_open+0x1cc/0x250 [ 92.188110] ? security_file_open+0x88/0x190 [ 92.192529] do_dentry_open+0x44e/0xe20 [ 92.196514] ? bd_acquire+0x2c0/0x2c0 [ 92.200336] vfs_open+0x105/0x230 [ 92.203805] path_openat+0xb6c/0x2be0 [ 92.207644] ? path_mountpoint+0x9a0/0x9a0 [ 92.211894] ? trace_hardirqs_on+0x10/0x10 [ 92.216920] ? kasan_init_slab_obj+0x21/0x30 [ 92.221375] do_filp_open+0x1a1/0x280 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.225194] ? may_open_dev+0xe0/0xe0 [ 92.229016] ? lock_downgrade+0x630/0x630 [ 92.233171] ? lock_acquire+0x12b/0x360 [ 92.237152] ? __alloc_fd+0x3f/0x490 [ 92.240880] ? do_raw_spin_unlock+0x50/0x220 [ 92.245301] ? _raw_spin_unlock+0x29/0x40 [ 92.249457] ? __alloc_fd+0x1bf/0x490 [ 92.253281] do_sys_open+0x2ca/0x590 [ 92.257009] ? filp_open+0x60/0x60 [ 92.260565] ? do_syscall_64+0x43/0x520 [ 92.264548] ? do_sys_open+0x590/0x590 [ 92.268447] do_syscall_64+0x19b/0x520 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.272349] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 92.277539] RIP: 0033:0x7fcefacfa120 [ 92.281251] RSP: 002b:00007ffc549f5328 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 92.288965] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcefacfa120 [ 92.296247] RDX: 00007ffc549f5f45 RSI: 0000000000000000 RDI: 00007ffc549f5f45 [ 92.303552] RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 [ 92.310833] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000025ff030 [ 92.318114] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.325417] [ 92.327058] Allocated by task 5359: [ 92.330693] __kasan_kmalloc.part.0+0x53/0xc0 [ 92.335196] alloc_disk_node+0x5b/0x3d0 [ 92.339178] loop_add+0x3ee/0x870 [ 92.342668] loop_probe+0x153/0x180 [ 92.346305] kobj_lookup+0x226/0x410 [ 92.350023] get_gendisk+0x36/0x240 [ 92.353654] blkdev_get+0x131/0x8b0 [ 92.357285] blkdev_open+0x1cc/0x250 [ 92.361001] do_dentry_open+0x44e/0xe20 [ 92.364984] vfs_open+0x105/0x230 [ 92.368443] path_openat+0xb6c/0x2be0 [ 92.372247] do_filp_open+0x1a1/0x280 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.376056] do_sys_open+0x2ca/0x590 [ 92.379776] do_syscall_64+0x19b/0x520 [ 92.383673] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 92.388865] 0xffffffffffffffff [ 92.392140] [ 92.393777] Freed by task 5376: [ 92.397076] __kasan_slab_free+0x164/0x210 [ 92.401318] kfree+0x108/0x3a0 [ 92.404520] device_release+0xf4/0x1a0 [ 92.408441] kobject_put+0x142/0x200 [ 92.412156] put_disk+0x1f/0x30 [ 92.415441] __blkdev_get+0x5fa/0xf90 [ 92.419251] blkdev_get+0x97/0x8b0 [ 92.422794] blkdev_open+0x1cc/0x250 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.426510] do_dentry_open+0x44e/0xe20 [ 92.430487] vfs_open+0x105/0x230 [ 92.433946] path_openat+0xb6c/0x2be0 [ 92.437752] do_filp_open+0x1a1/0x280 [ 92.441553] do_sys_open+0x2ca/0x590 [ 92.445266] do_syscall_64+0x19b/0x520 [ 92.449159] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 92.454350] 0xffffffffffffffff [ 92.457623] [ 92.459248] The buggy address belongs to the object at ffff8881d2619100 [ 92.459248] which belongs to the cache kmalloc-2048 of size 2048 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.472083] The buggy address is located 1384 bytes inside of [ 92.472083] 2048-byte region [ffff8881d2619100, ffff8881d2619900) [ 92.484136] The buggy address belongs to the page: [ 92.489072] page:ffffea0007498600 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 92.499052] flags: 0x4000000000010200(slab|head) [ 92.503817] raw: 4000000000010200 0000000000000000 0000000000000000 00000001000f000f [ 92.511703] raw: ffffea0007075800 0000000200000002 ffff8881d6402800 0000000000000000 [ 92.519591] page dumped because: kasan: bad access detected [ 92.525302] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.526929] Memory state around the buggy address: [ 92.531864] ffff8881d2619500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.539232] ffff8881d2619580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.546599] >ffff8881d2619600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.553966] ^ [ 92.560729] ffff8881d2619680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.568094] ffff8881d2619700: 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 [ 92.575459] ================================================================== [ 92.582823] 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 executing program executing program executing program executing program executing program executing program executing program [ 92.670009] Kernel panic - not syncing: panic_on_warn set ... [ 92.670009] [ 92.677440] CPU: 0 PID: 5376 Comm: blkid Tainted: G B 4.14.152+ #0 [ 92.684887] Call Trace: [ 92.687478] dump_stack+0xca/0x134 [ 92.691029] panic+0x1f1/0x3da [ 92.694229] ? add_taint.cold+0x16/0x16 [ 92.698207] ? disk_unblock_events+0x4b/0x50 [ 92.702620] ? ___preempt_schedule+0x16/0x18 [ 92.707036] ? disk_unblock_events+0x4b/0x50 [ 92.711446] end_report+0x43/0x49 [ 92.714913] ? disk_unblock_events+0x4b/0x50 [ 92.719328] __kasan_report.cold+0xd/0x41 [ 92.723484] ? disk_unblock_events+0x4b/0x50 [ 92.727935] disk_unblock_events+0x4b/0x50 [ 92.732176] __blkdev_get+0x68f/0xf90 [ 92.735984] ? __blkdev_put+0x6d0/0x6d0 [ 92.739962] ? fsnotify+0x8b0/0x1150 [ 92.743683] blkdev_get+0x97/0x8b0 [ 92.747234] ? bd_acquire+0x171/0x2c0 [ 92.751036] ? bd_may_claim+0xd0/0xd0 [ 92.754835] ? lock_downgrade+0x630/0x630 [ 92.758992] ? lock_acquire+0x12b/0x360 [ 92.762966] ? bd_acquire+0x21/0x2c0 [ 92.766684] ? do_raw_spin_unlock+0x50/0x220 [ 92.771106] blkdev_open+0x1cc/0x250 [ 92.774826] ? security_file_open+0x88/0x190 [ 92.779237] do_dentry_open+0x44e/0xe20 [ 92.783239] ? bd_acquire+0x2c0/0x2c0 [ 92.787046] vfs_open+0x105/0x230 [ 92.790506] path_openat+0xb6c/0x2be0 [ 92.794316] ? path_mountpoint+0x9a0/0x9a0 [ 92.798558] ? trace_hardirqs_on+0x10/0x10 [ 92.802792] ? kasan_init_slab_obj+0x21/0x30 [ 92.807202] do_filp_open+0x1a1/0x280 [ 92.811004] ? may_open_dev+0xe0/0xe0 [ 92.814810] ? lock_downgrade+0x630/0x630 [ 92.818953] ? lock_acquire+0x12b/0x360 [ 92.822927] ? __alloc_fd+0x3f/0x490 [ 92.826643] ? do_raw_spin_unlock+0x50/0x220 [ 92.831050] ? _raw_spin_unlock+0x29/0x40 [ 92.835195] ? __alloc_fd+0x1bf/0x490 [ 92.839004] do_sys_open+0x2ca/0x590 [ 92.842714] ? filp_open+0x60/0x60 [ 92.846255] ? do_syscall_64+0x43/0x520 [ 92.850226] ? do_sys_open+0x590/0x590 [ 92.854118] do_syscall_64+0x19b/0x520 [ 92.858008] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 92.863194] RIP: 0033:0x7fcefacfa120 [ 92.866903] RSP: 002b:00007ffc549f5328 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 92.874612] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcefacfa120 [ 92.881882] RDX: 00007ffc549f5f45 RSI: 0000000000000000 RDI: 00007ffc549f5f45 [ 92.889151] RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 [ 92.896420] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000025ff030 [ 92.903688] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 92.911614] Kernel Offset: 0x15e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 92.922527] Rebooting in 86400 seconds..