Warning: Permanently added '10.128.0.136' (ECDSA) to the list of known hosts. [ 126.958495] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 127.047031] audit: type=1400 audit(1551293298.018:7): avc: denied { map } for pid=1834 comm="syz-executor155" path="/root/syz-executor155141662" 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 [ 127.183367] hrtimer: interrupt took 46094 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 175.865395] ================================================================== [ 175.872966] BUG: KASAN: use-after-free in disk_unblock_events+0x4b/0x50 [ 175.879698] Read of size 8 at addr ffff8881c8efb868 by task blkid/6212 [ 175.886342] [ 175.887954] CPU: 1 PID: 6212 Comm: blkid Not tainted 4.14.104+ #21 [ 175.894249] Call Trace: [ 175.896816] dump_stack+0xb9/0x10e [ 175.900487] ? disk_unblock_events+0x4b/0x50 [ 175.904883] print_address_description+0x60/0x226 [ 175.909702] ? disk_unblock_events+0x4b/0x50 [ 175.914091] kasan_report.cold+0x88/0x2a5 [ 175.918297] ? disk_unblock_events+0x4b/0x50 [ 175.922699] ? __blkdev_get+0x68f/0xf90 [ 175.926764] ? __blkdev_put+0x6d0/0x6d0 [ 175.930850] ? fsnotify+0x8b0/0x1150 [ 175.934557] ? blkdev_get+0x97/0x8b0 [ 175.938377] ? bd_acquire+0x171/0x2c0 [ 175.942244] ? bd_may_claim+0xd0/0xd0 [ 175.946034] ? lock_downgrade+0x5d0/0x5d0 [ 175.950161] ? lock_acquire+0x10f/0x380 [ 175.954115] ? bd_acquire+0x21/0x2c0 [ 175.957819] ? 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 175.961790] ? security_file_open+0x88/0x190 [ 175.966190] ? do_dentry_open+0x41b/0xd60 [ 175.970376] ? bd_acquire+0x2c0/0x2c0 [ 175.974282] ? vfs_open+0x105/0x230 [ 175.977893] ? path_openat+0xb6b/0x2b70 [ 175.981853] ? path_mountpoint+0x9a0/0x9a0 [ 175.986078] ? trace_hardirqs_on+0x10/0x10 [ 175.990301] ? do_filp_open+0x1a1/0x280 [ 175.994262] ? may_open_dev+0xe0/0xe0 [ 175.998047] ? lock_downgrade+0x5d0/0x5d0 [ 176.002245] ? lock_acquire+0x10f/0x380 [ 176.006209] ? __alloc_fd+0x3f/0x490 [ 176.009918] ? _raw_spin_unlock+0x29/0x40 [ 176.014043] ? __alloc_fd+0x1bf/0x490 [ 176.017826] ? do_sys_open+0x2ca/0x590 [ 176.021699] ? filp_open+0x60/0x60 [ 176.025223] ? do_syscall_64+0x43/0x4b0 [ 176.029173] ? do_sys_open+0x590/0x590 [ 176.033039] ? do_syscall_64+0x19b/0x4b0 [ 176.037149] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 176.042502] [ 176.044107] Allocated by task 6211: [ 176.047876] kasan_kmalloc.part.0+0x4f/0xd0 [ 176.052220] kmem_cache_alloc_trace+0x126/0x310 [ 176.056879] alloc_disk_node+0x5b/0x3d0 [ 176.060833] [ 176.062446] Freed by task 6212: [ 176.065706] kasan_slab_free+0xb0/0x190 [ 176.069658] kfree+0xf5/0x310 [ 176.072740] device_release+0xf4/0x1a0 [ 176.076603] [ 176.078212] The buggy address belongs to the object at ffff8881c8efb300 [ 176.078212] which belongs to the cache kmalloc-2048 of size 2048 [ 176.091019] The buggy address is located 1384 bytes inside of [ 176.091019] 2048-byte region [ffff8881c8efb300, ffff8881c8efbb00) [ 176.103044] The buggy address belongs to the page: [ 176.107950] page:ffffea000723be00 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 176.117898] flags: 0x4000000000008100(slab|head) [ 176.122633] raw: 4000000000008100 0000000000000000 0000000000000000 00000001000f000f [ 176.130490] raw: 0000000000000000 0000000100000001 ffff8881da802800 0000000000000000 [ 176.138353] page dumped because: kasan: bad access detected [ 176.144039] [ 176.145641] Memory state around the buggy address: [ 176.150696] ffff8881c8efb700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 176.158037] ffff8881c8efb780: 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 [ 176.165371] >ffff8881c8efb800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 176.172805] ^ [ 176.179541] ffff8881c8efb880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 176.186881] ffff8881c8efb900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 176.194212] ================================================================== [ 176.201545] Disabling lock debugging due to kernel taint [ 176.233022] Kernel panic - not syncing: panic_on_warn set ... [ 176.233022] [ 176.240379] CPU: 1 PID: 6212 Comm: blkid Tainted: G B 4.14.104+ #21 [ 176.247885] Call Trace: [ 176.250455] dump_stack+0xb9/0x10e [ 176.253975] panic+0x1d9/0x3c2 [ 176.257142] ? add_taint.cold+0x16/0x16 [ 176.261096] ? disk_unblock_events+0x4b/0x50 [ 176.265484] ? ___preempt_schedule+0x16/0x18 [ 176.269875] ? disk_unblock_events+0x4b/0x50 [ 176.274258] kasan_end_report+0x43/0x49 [ 176.278208] kasan_report.cold+0xa4/0x2a5 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 176.282329] ? disk_unblock_events+0x4b/0x50 [ 176.286716] ? __blkdev_get+0x68f/0xf90 [ 176.290666] ? __blkdev_put+0x6d0/0x6d0 [ 176.294615] ? fsnotify+0x8b0/0x1150 [ 176.298308] ? blkdev_get+0x97/0x8b0 [ 176.302000] ? bd_acquire+0x171/0x2c0 [ 176.305775] ? bd_may_claim+0xd0/0xd0 [ 176.309552] ? lock_downgrade+0x5d0/0x5d0 [ 176.313676] ? lock_acquire+0x10f/0x380 [ 176.317628] ? bd_acquire+0x21/0x2c0 [ 176.321322] ? blkdev_open+0x1cc/0x250 [ 176.325191] ? security_file_open+0x88/0x190 [ 176.329581] ? do_dentry_open+0x41b/0xd60 executing program executing program executing program executing program executing program [ 176.333709] ? bd_acquire+0x2c0/0x2c0 [ 176.337487] ? vfs_open+0x105/0x230 [ 176.341096] ? path_openat+0xb6b/0x2b70 [ 176.345117] ? path_mountpoint+0x9a0/0x9a0 [ 176.349334] ? trace_hardirqs_on+0x10/0x10 [ 176.353550] ? do_filp_open+0x1a1/0x280 [ 176.357504] ? may_open_dev+0xe0/0xe0 [ 176.361292] ? lock_downgrade+0x5d0/0x5d0 [ 176.365419] ? lock_acquire+0x10f/0x380 [ 176.369479] ? __alloc_fd+0x3f/0x490 [ 176.373174] ? _raw_spin_unlock+0x29/0x40 [ 176.377296] ? __alloc_fd+0x1bf/0x490 [ 176.381081] ? do_sys_open+0x2ca/0x590 [ 176.384948] ? filp_open+0x60/0x60 [ 176.388472] ? do_syscall_64+0x43/0x4b0 [ 176.392422] ? do_sys_open+0x590/0x590 [ 176.396284] ? do_syscall_64+0x19b/0x4b0 [ 176.400322] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 176.405938] Kernel Offset: 0x2a800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 176.416840] Rebooting in 86400 seconds..