Warning: Permanently added '10.128.15.207' (ECDSA) to the list of known hosts. [ 110.155748] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 110.250820] audit: type=1400 audit(1543870159.606:7): avc: denied { map } for pid=1829 comm="syz-executor550" path="/root/syz-executor550663239" 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 INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 133.631341] ================================================================== [ 133.638787] BUG: KASAN: use-after-free in disk_unblock_events+0x4b/0x50 [ 133.645535] Read of size 8 at addr ffff8881d7248de8 by task syz-executor550/4046 [ 133.653061] [ 133.654688] CPU: 0 PID: 4046 Comm: syz-executor550 Not tainted 4.14.85+ #15 [ 133.661781] Call Trace: [ 133.664369] dump_stack+0xb9/0x11b [ 133.667926] print_address_description+0x60/0x22b [ 133.672768] kasan_report.cold.6+0x11b/0x2dd [ 133.677175] ? disk_unblock_events+0x4b/0x50 [ 133.681582] disk_unblock_events+0x4b/0x50 [ 133.685816] __blkdev_get+0x68f/0xe50 [ 133.689628] ? __blkdev_put+0x6e0/0x6e0 [ 133.693625] ? check_preemption_disabled+0x34/0x1e0 [ 133.698638] ? fsnotify+0x773/0x1200 [ 133.702358] blkdev_get+0x97/0x8c0 [ 133.705912] ? bd_may_claim+0xe0/0xe0 [ 133.709707] ? bd_acquire+0x171/0x2c0 [ 133.713507] ? lock_downgrade+0x560/0x560 [ 133.717647] ? lock_acquire+0x10f/0x380 [ 133.721621] ? bd_acquire+0x21/0x2c0 [ 133.725359] blkdev_open+0x1bd/0x240 [ 133.729075] ? security_file_open+0x88/0x190 [ 133.733484] do_dentry_open+0x426/0xda0 [ 133.737458] ? bd_acquire+0x2c0/0x2c0 [ 133.741281] vfs_open+0x11c/0x210 [ 133.744738] path_openat+0x5f9/0x2930 [ 133.748550] ? path_mountpoint+0x9a0/0x9a0 [ 133.752785] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 133.757463] ? trace_hardirqs_on+0x10/0x10 [ 133.761725] do_filp_open+0x197/0x270 [ 133.765610] ? may_open_dev+0xd0/0xd0 [ 133.769429] ? _raw_spin_unlock+0x29/0x40 [ 133.773594] do_sys_open+0x2ef/0x580 [ 133.777312] ? filp_open+0x60/0x60 [ 133.780847] ? lock_downgrade+0x560/0x560 [ 133.784996] ? lock_acquire+0x10f/0x380 [ 133.788969] ? finish_task_switch+0x1bd/0x610 [ 133.793464] ? _raw_spin_unlock_irq+0x24/0x50 [ 133.797971] ? do_syscall_64+0x43/0x4b0 [ 133.801949] ? do_sys_open+0x580/0x580 [ 133.805839] do_syscall_64+0x19b/0x4b0 [ 133.809743] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 133.814926] RIP: 0033:0x405991 [ 133.818112] RSP: 002b:00007f5f72cd2970 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 133.825816] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405991 [ 133.833174] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5f72cd2980 [ 133.840442] RBP: 6666666666666667 R08: 000000000000000f R09: 00007f5f72cd3700 [ 133.847713] R10: 00007f5f72cd39d0 R11: 0000000000000293 R12: 0000000000000000 [ 133.854982] R13: 6f6f6c2f7665642f R14: 6f72746e6f632d70 R15: 00000000006dcd2c [ 133.862272] [ 133.863917] Allocated by task 4036: [ 133.867547] kasan_kmalloc.part.1+0x4f/0xd0 [ 133.871865] kmem_cache_alloc_trace+0x138/0x300 [ 133.876546] alloc_disk_node+0x5f/0x3b0 [ 133.880524] loop_add+0x3e9/0x840 [ 133.883972] loop_probe+0x14f/0x180 [ 133.887595] kobj_lookup+0x230/0x420 [ 133.891347] get_gendisk+0x32/0x230 [ 133.894972] __blkdev_get+0x345/0xe50 [ 133.898769] blkdev_get+0x97/0x8c0 [ 133.902304] blkdev_open+0x1bd/0x240 [ 133.906013] do_dentry_open+0x426/0xda0 [ 133.909986] vfs_open+0x11c/0x210 [ 133.913443] path_openat+0x5f9/0x2930 [ 133.917251] do_filp_open+0x197/0x270 [ 133.921057] do_sys_open+0x2ef/0x580 [ 133.924766] do_syscall_64+0x19b/0x4b0 [ 133.928649] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 133.933837] [ 133.935456] Freed by task 4046: [ 133.938738] kasan_slab_free+0xac/0x190 [ 133.942707] kfree+0xf5/0x310 [ 133.945812] device_release+0xf4/0x1a0 [ 133.949693] kobject_put+0x146/0x200 [ 133.953402] put_disk+0x1f/0x30 [ 133.956678] __blkdev_get+0x5fa/0xe50 [ 133.960475] blkdev_get+0x97/0x8c0 [ 133.964008] blkdev_open+0x1bd/0x240 [ 133.967723] do_dentry_open+0x426/0xda0 [ 133.971700] vfs_open+0x11c/0x210 [ 133.975152] path_openat+0x5f9/0x2930 [ 133.978959] do_filp_open+0x197/0x270 [ 133.982756] do_sys_open+0x2ef/0x580 [ 133.986475] do_syscall_64+0x19b/0x4b0 [ 133.990366] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 133.995544] [ 133.997172] The buggy address belongs to the object at ffff8881d7248880 [ 133.997172] which belongs to the cache kmalloc-2048 of size 2048 [ 134.010000] The buggy address is located 1384 bytes inside of [ 134.010000] 2048-byte region [ffff8881d7248880, ffff8881d7249080) [ 134.022047] The buggy address belongs to the page: [ 134.026978] page:ffffea00075c9200 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 134.036954] flags: 0x4000000000008100(slab|head) [ 134.041709] raw: 4000000000008100 0000000000000000 0000000000000000 00000001800f000f [ 134.049589] raw: dead000000000100 dead000000000200 ffff8881da802800 0000000000000000 [ 134.057459] page dumped because: kasan: bad access detected [ 134.063165] [ 134.064785] Memory state around the buggy address: [ 134.069709] ffff8881d7248c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program [ 134.077061] ffff8881d7248d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.084416] >ffff8881d7248d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.091770] ^ [ 134.098521] ffff8881d7248e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.105877] ffff8881d7248e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.113240] ================================================================== [ 134.120596] Disabling lock debugging due to kernel taint executing program executing program executing program executing program [ 134.132630] Kernel panic - not syncing: panic_on_warn set ... [ 134.132630] [ 134.140031] CPU: 0 PID: 4046 Comm: syz-executor550 Tainted: G B 4.14.85+ #15 [ 134.148334] Call Trace: [ 134.150929] dump_stack+0xb9/0x11b [ 134.154470] panic+0x1bf/0x3a4 [ 134.157657] ? add_taint.cold.4+0x16/0x16 [ 134.161800] ? ___preempt_schedule+0x16/0x18 [ 134.166216] kasan_end_report+0x43/0x49 [ 134.170186] kasan_report.cold.6+0x77/0x2dd [ 134.174503] ? disk_unblock_events+0x4b/0x50 [ 134.178929] disk_unblock_events+0x4b/0x50 executing program [ 134.183163] __blkdev_get+0x68f/0xe50 [ 134.186960] ? __blkdev_put+0x6e0/0x6e0 [ 134.190937] ? check_preemption_disabled+0x34/0x1e0 [ 134.195945] ? fsnotify+0x773/0x1200 [ 134.199656] blkdev_get+0x97/0x8c0 [ 134.203193] ? bd_may_claim+0xe0/0xe0 [ 134.206985] ? bd_acquire+0x171/0x2c0 [ 134.210782] ? lock_downgrade+0x560/0x560 [ 134.214924] ? lock_acquire+0x10f/0x380 [ 134.218905] ? bd_acquire+0x21/0x2c0 [ 134.222619] blkdev_open+0x1bd/0x240 [ 134.226325] ? security_file_open+0x88/0x190 executing program executing program executing program [ 134.230736] do_dentry_open+0x426/0xda0 [ 134.234705] ? bd_acquire+0x2c0/0x2c0 [ 134.238509] vfs_open+0x11c/0x210 [ 134.241961] path_openat+0x5f9/0x2930 [ 134.245758] ? path_mountpoint+0x9a0/0x9a0 [ 134.249992] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 134.254485] ? trace_hardirqs_on+0x10/0x10 [ 134.258727] do_filp_open+0x197/0x270 [ 134.262524] ? may_open_dev+0xd0/0xd0 [ 134.266329] ? _raw_spin_unlock+0x29/0x40 [ 134.270482] do_sys_open+0x2ef/0x580 [ 134.274194] ? filp_open+0x60/0x60 [ 134.277727] ? lock_downgrade+0x560/0x560 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 134.281872] ? lock_acquire+0x10f/0x380 [ 134.285852] ? finish_task_switch+0x1bd/0x610 [ 134.290340] ? _raw_spin_unlock_irq+0x24/0x50 [ 134.294834] ? do_syscall_64+0x43/0x4b0 [ 134.298809] ? do_sys_open+0x580/0x580 [ 134.302696] do_syscall_64+0x19b/0x4b0 [ 134.306593] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 134.311776] RIP: 0033:0x405991 [ 134.314958] RSP: 002b:00007f5f72cd2970 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 134.322664] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405991 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 134.329928] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5f72cd2980 [ 134.337199] RBP: 6666666666666667 R08: 000000000000000f R09: 00007f5f72cd3700 [ 134.344464] R10: 00007f5f72cd39d0 R11: 0000000000000293 R12: 0000000000000000 [ 134.351744] R13: 6f6f6c2f7665642f R14: 6f72746e6f632d70 R15: 00000000006dcd2c [ 134.359354] Kernel Offset: 0x9000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 134.370182] Rebooting in 86400 seconds..