Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. [ 466.318345] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 466.447912] audit: type=1400 audit(1564051218.889:36): avc: denied { map } for pid=7113 comm="syz-executor128" path="/root/syz-executor128489272" dev="sda1" ino=1426 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 [ 484.295716] ================================================================== [ 484.303525] BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60 [ 484.310291] Read of size 8 at addr ffff888095c536c8 by task syz-executor128/9911 [ 484.317826] [ 484.319556] CPU: 0 PID: 9911 Comm: syz-executor128 Not tainted 4.14.134 #29 [ 484.326663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 484.336094] Call Trace: [ 484.338813] dump_stack+0x138/0x19c executing program [ 484.342496] ? disk_unblock_events+0x55/0x60 [ 484.346918] print_address_description.cold+0x7c/0x1dc [ 484.352217] ? disk_unblock_events+0x55/0x60 [ 484.356666] kasan_report.cold+0xa9/0x2af [ 484.360832] __asan_report_load8_noabort+0x14/0x20 [ 484.365779] disk_unblock_events+0x55/0x60 [ 484.370026] __blkdev_get+0x7d6/0x1120 [ 484.373938] ? __blkdev_put+0x7f0/0x7f0 [ 484.377923] ? bd_acquire+0x178/0x2c0 [ 484.381754] ? find_held_lock+0x35/0x130 [ 484.385836] blkdev_get+0xa8/0x8e0 [ 484.389404] ? bd_may_claim+0xd0/0xd0 [ 484.393411] ? _raw_spin_unlock+0x2d/0x50 [ 484.397806] blkdev_open+0x1d1/0x260 [ 484.401557] ? security_file_open+0x89/0x190 [ 484.405994] do_dentry_open+0x73b/0xeb0 [ 484.410083] ? bd_acquire+0x2c0/0x2c0 [ 484.414626] vfs_open+0x105/0x220 [ 484.418240] path_openat+0x8bd/0x3f70 [ 484.422186] ? path_lookupat.isra.0+0x7b0/0x7b0 [ 484.426907] ? __alloc_fd+0x1d4/0x4a0 [ 484.430736] do_filp_open+0x18e/0x250 [ 484.434551] ? may_open_dev+0xe0/0xe0 [ 484.438458] ? _raw_spin_unlock+0x2d/0x50 [ 484.442795] ? __alloc_fd+0x1d4/0x4a0 [ 484.446613] do_sys_open+0x2c5/0x430 [ 484.450337] ? filp_open+0x70/0x70 [ 484.453889] SyS_open+0x2d/0x40 [ 484.457170] ? do_sys_open+0x430/0x430 [ 484.461064] do_syscall_64+0x1e8/0x640 [ 484.464962] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 484.469851] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 484.475045] RIP: 0033:0x405751 [ 484.478238] RSP: 002b:00007fdeb013e980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 484.486218] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405751 [ 484.493496] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fdeb013e990 [ 484.500859] RBP: 6666666666666667 R08: 000000000000000f R09: 00007fdeb013f700 [ 484.508735] R10: 00007fdeb013f9d0 R11: 0000000000000293 R12: 00000000006dbc4c [ 484.516018] R13: 00007fffa6f7b1ff R14: 00007fdeb013f9c0 R15: 000000000000002d [ 484.523449] [ 484.525071] Allocated by task 9911: [ 484.528914] save_stack_trace+0x16/0x20 [ 484.532881] save_stack+0x45/0xd0 [ 484.536358] kasan_kmalloc+0xce/0xf0 [ 484.540078] kmem_cache_alloc_node_trace+0x153/0x770 [ 484.545190] alloc_disk_node+0x64/0x3e0 [ 484.549319] alloc_disk+0x1b/0x20 [ 484.552862] loop_add+0x3e7/0x850 [ 484.556318] loop_probe+0x136/0x160 [ 484.559946] kobj_lookup+0x21c/0x400 [ 484.563663] get_gendisk+0x3b/0x240 [ 484.567292] __blkdev_get+0x3af/0x1120 [ 484.571188] blkdev_get+0xa8/0x8e0 [ 484.574819] blkdev_open+0x1d1/0x260 [ 484.578541] do_dentry_open+0x73b/0xeb0 [ 484.582820] vfs_open+0x105/0x220 [ 484.586276] path_openat+0x8bd/0x3f70 [ 484.590076] do_filp_open+0x18e/0x250 [ 484.593878] do_sys_open+0x2c5/0x430 [ 484.597598] SyS_open+0x2d/0x40 [ 484.600874] do_syscall_64+0x1e8/0x640 [ 484.604762] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 484.609947] [ 484.611575] Freed by task 9911: [ 484.614872] save_stack_trace+0x16/0x20 [ 484.618859] save_stack+0x45/0xd0 [ 484.622324] kasan_slab_free+0x75/0xc0 [ 484.626270] kfree+0xcc/0x270 [ 484.629387] disk_release+0x24b/0x2d0 [ 484.633191] device_release+0xf6/0x1a0 [ 484.637223] kobject_put.cold+0x269/0x2f9 [ 484.641370] put_disk+0x23/0x30 [ 484.644646] __blkdev_get+0x73c/0x1120 [ 484.648535] blkdev_get+0xa8/0x8e0 [ 484.652076] blkdev_open+0x1d1/0x260 [ 484.655967] do_dentry_open+0x73b/0xeb0 [ 484.659951] vfs_open+0x105/0x220 [ 484.663421] path_openat+0x8bd/0x3f70 [ 484.667232] do_filp_open+0x18e/0x250 [ 484.671047] do_sys_open+0x2c5/0x430 [ 484.674769] SyS_open+0x2d/0x40 [ 484.678316] do_syscall_64+0x1e8/0x640 [ 484.682238] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 484.687422] [ 484.689055] The buggy address belongs to the object at ffff888095c53140 [ 484.689055] which belongs to the cache kmalloc-2048 of size 2048 [ 484.701893] The buggy address is located 1416 bytes inside of [ 484.701893] 2048-byte region [ffff888095c53140, ffff888095c53940) [ 484.713944] The buggy address belongs to the page: [ 484.718880] page:ffffea0002571480 count:1 mapcount:0 mapping:ffff888095c52040 index:0x0 compound_mapcount: 0 [ 484.728864] flags: 0x1fffc0000008100(slab|head) [ 484.733574] raw: 01fffc0000008100 ffff888095c52040 0000000000000000 0000000100000003 [ 484.741477] raw: ffffea00022cc920 ffffea0001f720a0 ffff8880aa800c40 0000000000000000 [ 484.749358] page dumped because: kasan: bad access detected [ 484.755333] [ 484.756965] Memory state around the buggy address: [ 484.761946] ffff888095c53580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 484.771030] ffff888095c53600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 484.778440] >ffff888095c53680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 484.785807] ^ executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 484.791876] ffff888095c53700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 484.799249] ffff888095c53780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 484.806616] ================================================================== [ 484.813982] Disabling lock debugging due to kernel taint [ 484.825423] Kernel panic - not syncing: panic_on_warn set ... [ 484.825423] [ 484.832838] CPU: 0 PID: 9911 Comm: syz-executor128 Tainted: G B 4.14.134 #29 [ 484.841155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 484.850513] Call Trace: [ 484.853116] dump_stack+0x138/0x19c [ 484.858683] ? disk_unblock_events+0x55/0x60 [ 484.863136] panic+0x1f2/0x426 [ 484.866412] ? add_taint.cold+0x16/0x16 [ 484.870404] ? ___preempt_schedule+0x16/0x18 [ 484.874838] kasan_end_report+0x47/0x4f [ 484.878821] kasan_report.cold+0x130/0x2af [ 484.883095] __asan_report_load8_noabort+0x14/0x20 [ 484.888034] disk_unblock_events+0x55/0x60 [ 484.892309] __blkdev_get+0x7d6/0x1120 [ 484.896197] ? __blkdev_put+0x7f0/0x7f0 [ 484.901712] ? bd_acquire+0x178/0x2c0 [ 484.905526] ? find_held_lock+0x35/0x130 [ 484.909601] blkdev_get+0xa8/0x8e0 [ 484.913162] ? bd_may_claim+0xd0/0xd0 [ 484.916964] ? _raw_spin_unlock+0x2d/0x50 [ 484.921114] blkdev_open+0x1d1/0x260 [ 484.924853] ? security_file_open+0x89/0x190 [ 484.929275] do_dentry_open+0x73b/0xeb0 [ 484.933253] ? bd_acquire+0x2c0/0x2c0 [ 484.937058] vfs_open+0x105/0x220 [ 484.941445] path_openat+0x8bd/0x3f70 [ 484.945256] ? path_lookupat.isra.0+0x7b0/0x7b0 [ 484.949940] ? __alloc_fd+0x1d4/0x4a0 [ 484.953756] do_filp_open+0x18e/0x250 [ 484.957571] ? may_open_dev+0xe0/0xe0 [ 484.961492] ? _raw_spin_unlock+0x2d/0x50 [ 484.965700] ? __alloc_fd+0x1d4/0x4a0 [ 484.969647] do_sys_open+0x2c5/0x430 [ 484.973370] ? filp_open+0x70/0x70 [ 484.976934] SyS_open+0x2d/0x40 [ 484.980215] ? do_sys_open+0x430/0x430 [ 484.984109] do_syscall_64+0x1e8/0x640 [ 484.988006] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 484.992855] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 484.998045] RIP: 0033:0x405751 [ 485.001232] RSP: 002b:00007fdeb013e980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 485.008946] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405751 [ 485.016392] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fdeb013e990 [ 485.023662] RBP: 6666666666666667 R08: 000000000000000f R09: 00007fdeb013f700 [ 485.031211] R10: 00007fdeb013f9d0 R11: 0000000000000293 R12: 00000000006dbc4c [ 485.038517] R13: 00007fffa6f7b1ff R14: 00007fdeb013f9c0 R15: 000000000000002d [ 485.046893] Kernel Offset: disabled [ 485.050528] Rebooting in 86400 seconds..