Warning: Permanently added '10.128.0.124' (ECDSA) to the list of known hosts. [ 484.606668] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 484.740000] audit: type=1400 audit(1566700167.646:36): avc: denied { map } for pid=6863 comm="syz-executor515" path="/root/syz-executor515765023" 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 [ 489.326543] ================================================================== [ 489.334666] BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60 [ 489.342009] Read of size 8 at addr ffff8880a558f308 by task blkid/7600 [ 489.348837] [ 489.350474] CPU: 0 PID: 7600 Comm: blkid Not tainted 4.14.139 #35 [ 489.356691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 489.366180] Call Trace: [ 489.368811] dump_stack+0x138/0x19c [ 489.372488] ? disk_unblock_events+0x55/0x60 [ 489.376918] print_address_description.cold+0x7c/0x1dc [ 489.382187] ? disk_unblock_events+0x55/0x60 [ 489.386649] kasan_report.cold+0xa9/0x2af [ 489.390815] __asan_report_load8_noabort+0x14/0x20 [ 489.395864] disk_unblock_events+0x55/0x60 [ 489.400115] __blkdev_get+0x7d6/0x1120 [ 489.404051] ? __blkdev_put+0x7f0/0x7f0 [ 489.408139] ? bd_acquire+0x178/0x2c0 [ 489.412245] ? find_held_lock+0x35/0x130 [ 489.416743] blkdev_get+0xa8/0x8e0 [ 489.420276] ? bd_may_claim+0xd0/0xd0 [ 489.424226] ? _raw_spin_unlock+0x2d/0x50 [ 489.428445] blkdev_open+0x1d1/0x260 [ 489.432303] ? security_file_open+0x89/0x190 [ 489.436719] do_dentry_open+0x73b/0xeb0 [ 489.440705] ? bd_acquire+0x2c0/0x2c0 [ 489.444620] vfs_open+0x105/0x220 [ 489.448130] path_openat+0x8bd/0x3f70 [ 489.452031] ? trace_hardirqs_on+0x10/0x10 [ 489.456363] ? path_lookupat.isra.0+0x7b0/0x7b0 [ 489.461120] ? find_held_lock+0x35/0x130 [ 489.465303] ? __alloc_fd+0x1d4/0x4a0 [ 489.469119] do_filp_open+0x18e/0x250 [ 489.472990] ? may_open_dev+0xe0/0xe0 [ 489.476900] ? _raw_spin_unlock+0x2d/0x50 [ 489.481063] ? __alloc_fd+0x1d4/0x4a0 [ 489.484858] do_sys_open+0x2c5/0x430 [ 489.488685] ? filp_open+0x70/0x70 [ 489.492856] SyS_open+0x2d/0x40 [ 489.496701] ? do_sys_open+0x430/0x430 [ 489.500729] do_syscall_64+0x1e8/0x640 [ 489.504624] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 489.509652] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 489.515334] RIP: 0033:0x7f72f6bd9120 [ 489.519049] RSP: 002b:00007ffc6a1dabd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 489.526868] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f72f6bd9120 [ 489.534468] RDX: 00007ffc6a1dcf44 RSI: 0000000000000000 RDI: 00007ffc6a1dcf44 [ 489.541903] RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 [ 489.549181] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001c0b030 [ 489.556673] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 489.564144] [ 489.565862] Allocated by task 7589: [ 489.569499] save_stack_trace+0x16/0x20 [ 489.573540] save_stack+0x45/0xd0 [ 489.577256] kasan_kmalloc+0xce/0xf0 [ 489.580982] kmem_cache_alloc_node_trace+0x153/0x770 [ 489.586078] alloc_disk_node+0x64/0x3e0 [ 489.590131] alloc_disk+0x1b/0x20 [ 489.593586] loop_add+0x3e7/0x850 [ 489.597113] loop_probe+0x136/0x160 [ 489.601374] kobj_lookup+0x21c/0x400 [ 489.605090] get_gendisk+0x3b/0x240 [ 489.608869] blkdev_get+0x133/0x8e0 [ 489.612501] blkdev_open+0x1d1/0x260 [ 489.616205] do_dentry_open+0x73b/0xeb0 [ 489.620374] vfs_open+0x105/0x220 [ 489.623994] path_openat+0x8bd/0x3f70 [ 489.627858] do_filp_open+0x18e/0x250 [ 489.631945] do_sys_open+0x2c5/0x430 [ 489.635740] SyS_open+0x2d/0x40 [ 489.639023] do_syscall_64+0x1e8/0x640 [ 489.642966] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 489.648157] [ 489.649888] Freed by task 7600: [ 489.653169] save_stack_trace+0x16/0x20 [ 489.657133] save_stack+0x45/0xd0 [ 489.660568] kasan_slab_free+0x75/0xc0 [ 489.664583] kfree+0xcc/0x270 [ 489.667690] disk_release+0x24b/0x2d0 [ 489.671503] device_release+0xf6/0x1a0 [ 489.675384] kobject_put.cold+0x269/0x2f9 [ 489.679515] put_disk+0x23/0x30 [ 489.682793] __blkdev_get+0x73c/0x1120 [ 489.686750] blkdev_get+0xa8/0x8e0 [ 489.690349] blkdev_open+0x1d1/0x260 [ 489.694078] do_dentry_open+0x73b/0xeb0 [ 489.698463] vfs_open+0x105/0x220 [ 489.702062] path_openat+0x8bd/0x3f70 [ 489.705954] do_filp_open+0x18e/0x250 [ 489.709836] do_sys_open+0x2c5/0x430 [ 489.713729] SyS_open+0x2d/0x40 [ 489.717104] do_syscall_64+0x1e8/0x640 [ 489.721424] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 489.726606] [ 489.728293] The buggy address belongs to the object at ffff8880a558ed80 [ 489.728293] which belongs to the cache kmalloc-2048 of size 2048 [ 489.741820] The buggy address is located 1416 bytes inside of [ 489.741820] 2048-byte region [ffff8880a558ed80, ffff8880a558f580) [ 489.754067] The buggy address belongs to the page: [ 489.759463] page:ffffea0002956380 count:1 mapcount:0 mapping:ffff8880a558e500 index:0x0 compound_mapcount: 0 [ 489.769672] flags: 0x1fffc0000008100(slab|head) [ 489.774457] raw: 01fffc0000008100 ffff8880a558e500 0000000000000000 0000000100000003 [ 489.782573] raw: ffffea000278ad20 ffffea00026d1420 ffff8880aa800c40 0000000000000000 [ 489.790460] page dumped because: kasan: bad access detected [ 489.796165] [ 489.797785] Memory state around the buggy address: [ 489.802841] ffff8880a558f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 489.810297] ffff8880a558f280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 489.817876] >ffff8880a558f300: 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 489.826051] ^ [ 489.829691] ffff8880a558f380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 489.837240] ffff8880a558f400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 489.844848] ================================================================== [ 489.853014] Disabling lock debugging due to kernel taint [ 489.868386] Kernel panic - not syncing: panic_on_warn set ... [ 489.868386] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 489.875989] CPU: 0 PID: 7600 Comm: blkid Tainted: G B 4.14.139 #35 [ 489.883583] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 489.892937] Call Trace: [ 489.895517] dump_stack+0x138/0x19c [ 489.899242] ? disk_unblock_events+0x55/0x60 [ 489.904037] panic+0x1f2/0x426 [ 489.907286] ? add_taint.cold+0x16/0x16 [ 489.911267] ? ___preempt_schedule+0x16/0x18 [ 489.915839] kasan_end_report+0x47/0x4f [ 489.920019] kasan_report.cold+0x130/0x2af [ 489.924318] __asan_report_load8_noabort+0x14/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 489.929258] disk_unblock_events+0x55/0x60 [ 489.933474] __blkdev_get+0x7d6/0x1120 [ 489.937347] ? __blkdev_put+0x7f0/0x7f0 [ 489.941324] ? bd_acquire+0x178/0x2c0 [ 489.945802] ? find_held_lock+0x35/0x130 [ 489.949873] blkdev_get+0xa8/0x8e0 [ 489.953505] ? bd_may_claim+0xd0/0xd0 [ 489.957521] ? _raw_spin_unlock+0x2d/0x50 [ 489.961793] blkdev_open+0x1d1/0x260 [ 489.965527] ? security_file_open+0x89/0x190 [ 489.969950] do_dentry_open+0x73b/0xeb0 [ 489.973931] ? bd_acquire+0x2c0/0x2c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 489.977749] vfs_open+0x105/0x220 [ 489.981214] path_openat+0x8bd/0x3f70 [ 489.985026] ? trace_hardirqs_on+0x10/0x10 [ 489.989361] ? path_lookupat.isra.0+0x7b0/0x7b0 [ 489.994039] ? find_held_lock+0x35/0x130 [ 489.998110] ? __alloc_fd+0x1d4/0x4a0 [ 490.001926] do_filp_open+0x18e/0x250 [ 490.005736] ? may_open_dev+0xe0/0xe0 [ 490.009552] ? _raw_spin_unlock+0x2d/0x50 [ 490.013708] ? __alloc_fd+0x1d4/0x4a0 [ 490.017530] do_sys_open+0x2c5/0x430 [ 490.021263] ? filp_open+0x70/0x70 [ 490.024820] SyS_open+0x2d/0x40 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 490.028113] ? do_sys_open+0x430/0x430 [ 490.032299] do_syscall_64+0x1e8/0x640 [ 490.036903] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 490.041758] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 490.046956] RIP: 0033:0x7f72f6bd9120 [ 490.051045] RSP: 002b:00007ffc6a1dabd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 490.058763] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f72f6bd9120 [ 490.066294] RDX: 00007ffc6a1dcf44 RSI: 0000000000000000 RDI: 00007ffc6a1dcf44 executing program executing program executing program executing program executing program executing program [ 490.073932] RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 [ 490.081214] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001c0b030 [ 490.088839] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 490.097530] Kernel Offset: disabled [ 490.101167] Rebooting in 86400 seconds..