[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.874824][ T27] audit: type=1800 audit(1584914552.237:25): pid=9203 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.911458][ T27] audit: type=1800 audit(1584914552.237:26): pid=9203 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.947930][ T27] audit: type=1800 audit(1584914552.247:27): pid=9203 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.225' (ECDSA) to the list of known hosts. syzkaller login: [ 162.598081][ T9361] IPVS: ftp: loaded support on port[0] = 21 [ 162.605568][ T9363] IPVS: ftp: loaded support on port[0] = 21 [ 162.613363][ T9362] IPVS: ftp: loaded support on port[0] = 21 [ 162.623723][ T9360] IPVS: ftp: loaded support on port[0] = 21 [ 162.633143][ T9365] IPVS: ftp: loaded support on port[0] = 21 [ 162.645199][ T9364] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program [ 162.977080][ C1] hrtimer: interrupt took 30931 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 [ 176.886403][T10028] ================================================================== [ 176.894623][T10028] BUG: KASAN: use-after-free in hci_sock_bind+0x591/0x1140 [ 176.901822][T10028] Write of size 4 at addr ffff888089679078 by task syz-executor918/10028 [ 176.910229][T10028] [ 176.912566][T10028] CPU: 1 PID: 10028 Comm: syz-executor918 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0 [ 176.922534][T10028] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 176.932592][T10028] Call Trace: [ 176.935891][T10028] dump_stack+0x188/0x20d [ 176.940234][T10028] ? hci_sock_bind+0x591/0x1140 [ 176.945095][T10028] ? hci_sock_bind+0x591/0x1140 [ 176.949957][T10028] print_address_description.constprop.0.cold+0xd3/0x315 [ 176.956988][T10028] ? hci_sock_bind+0x591/0x1140 [ 176.961843][T10028] ? hci_sock_bind+0x591/0x1140 [ 176.966697][T10028] __kasan_report.cold+0x1a/0x32 [ 176.971641][T10028] ? hci_sock_bind+0x4b1/0x1140 [ 176.976494][T10028] ? hci_sock_bind+0x591/0x1140 [ 176.981356][T10028] kasan_report+0xe/0x20 [ 176.985602][T10028] check_memory_region+0x128/0x190 [ 176.990723][T10028] hci_sock_bind+0x591/0x1140 [ 176.995419][T10028] ? hci_sock_compat_ioctl+0x80/0x80 [ 177.000851][T10028] __sys_bind+0x20e/0x250 [ 177.005190][T10028] ? __ia32_sys_socketpair+0xf0/0xf0 [ 177.010491][T10028] ? __this_cpu_preempt_check+0x84/0x190 [ 177.016154][T10028] ? smp_apic_timer_interrupt+0x1b6/0x600 [ 177.021888][T10028] ? retint_kernel+0x2b/0x2b [ 177.026495][T10028] ? do_syscall_64+0xaa/0x790 [ 177.031190][T10028] ? __x64_sys_bind+0xd/0xb0 [ 177.035792][T10028] __x64_sys_bind+0x6f/0xb0 [ 177.040423][T10028] ? lockdep_hardirqs_on+0x417/0x5d0 [ 177.045716][T10028] do_syscall_64+0xf6/0x790 [ 177.050233][T10028] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 177.056138][T10028] RIP: 0033:0x4435a9 [ 177.060064][T10028] Code: e8 1c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 177.079678][T10028] RSP: 002b:00007ffd328c7b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 [ 177.088097][T10028] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004435a9 [ 177.096076][T10028] RDX: 0000000000000006 RSI: 0000000020000080 RDI: 0000000000000006 [ 177.104056][T10028] RBP: 0000000000000005 R08: 00000000000003e8 R09: 00000000000003e8 [ 177.112042][T10028] R10: 00000000000003e8 R11: 0000000000000246 R12: 0000000000dc6914 [ 177.120027][T10028] R13: 000000000000000b R14: 0000000000000000 R15: 0000000000000000 [ 177.128047][T10028] [ 177.130379][T10028] Allocated by task 10029: [ 177.134805][T10028] save_stack+0x1b/0x40 [ 177.138969][T10028] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 177.144618][T10028] kmem_cache_alloc_trace+0x153/0x7d0 [ 177.149995][T10028] hci_alloc_dev+0x3e/0x1e20 [ 177.154613][T10028] __vhci_create_device+0x100/0x5b0 [ 177.159839][T10028] vhci_write+0x2bf/0x450 [ 177.164171][T10028] new_sync_write+0x49c/0x700 [ 177.168852][T10028] __vfs_write+0xc9/0x100 [ 177.173202][T10028] vfs_write+0x262/0x5c0 [ 177.177448][T10028] ksys_write+0x127/0x250 [ 177.181784][T10028] do_syscall_64+0xf6/0x790 [ 177.186293][T10028] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 177.192177][T10028] [ 177.194507][T10028] Freed by task 10029: [ 177.198578][T10028] save_stack+0x1b/0x40 [ 177.202831][T10028] __kasan_slab_free+0xf7/0x140 [ 177.207684][T10028] kfree+0x109/0x2b0 [ 177.211590][T10028] bt_host_release+0x15/0x20 [ 177.216189][T10028] device_release+0x71/0x200 [ 177.220783][T10028] kobject_put+0x1e7/0x2e0 [ 177.225197][T10028] put_device+0x1b/0x30 [ 177.229358][T10028] vhci_release+0x78/0xe0 [ 177.233776][T10028] __fput+0x2da/0x850 [ 177.237765][T10028] task_work_run+0x13f/0x1b0 [ 177.242360][T10028] exit_to_usermode_loop+0x2fa/0x360 [ 177.247651][T10028] do_syscall_64+0x672/0x790 [ 177.252250][T10028] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 177.258137][T10028] [ 177.260472][T10028] The buggy address belongs to the object at ffff888089678000 [ 177.260472][T10028] which belongs to the cache kmalloc-8k of size 8192 [ 177.274529][T10028] The buggy address is located 4216 bytes inside of [ 177.274529][T10028] 8192-byte region [ffff888089678000, ffff88808967a000) [ 177.288338][T10028] The buggy address belongs to the page: [ 177.293990][T10028] page:ffffea0002259e00 refcount:1 mapcount:0 mapping:00000000baf255d8 index:0x0 head:ffffea0002259e00 order:2 compound_mapcount:0 compound_pincount:0 [ 177.309244][T10028] flags: 0xfffe0000010200(slab|head) [ 177.314543][T10028] raw: 00fffe0000010200 ffffea0002a19608 ffffea0002500e08 ffff8880aa0021c0 [ 177.323137][T10028] raw: 0000000000000000 ffff888089678000 0000000100000001 0000000000000000 [ 177.331721][T10028] page dumped because: kasan: bad access detected [ 177.339645][T10028] [ 177.341969][T10028] Memory state around the buggy address: [ 177.347607][T10028] ffff888089678f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 177.355680][T10028] ffff888089678f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 177.363748][T10028] >ffff888089679000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 177.371813][T10028] ^ [ 177.379821][T10028] ffff888089679080: 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 [ 177.387895][T10028] ffff888089679100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 177.395958][T10028] ================================================================== [ 177.404044][T10028] Disabling lock debugging due to kernel taint [ 177.487183][T10028] Kernel panic - not syncing: panic_on_warn set ... [ 177.493819][T10028] CPU: 1 PID: 10028 Comm: syz-executor918 Tainted: G B 5.6.0-rc3-next-20200228-syzkaller #0 [ 177.505178][T10028] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 177.515234][T10028] Call Trace: [ 177.518545][T10028] dump_stack+0x188/0x20d [ 177.522883][T10028] panic+0x2e3/0x75c [ 177.526784][T10028] ? add_taint.cold+0x16/0x16 [ 177.531475][T10028] ? preempt_schedule_common+0x5e/0xc0 [ 177.536940][T10028] ? hci_sock_bind+0x591/0x1140 [ 177.541797][T10028] ? ___preempt_schedule+0x16/0x18 [ 177.546913][T10028] ? trace_hardirqs_on+0x55/0x220 [ 177.551942][T10028] ? hci_sock_bind+0x591/0x1140 [ 177.556922][T10028] end_report+0x43/0x49 [ 177.561105][T10028] ? hci_sock_bind+0x591/0x1140 [ 177.565960][T10028] __kasan_report.cold+0xd/0x32 [ 177.570824][T10028] ? hci_sock_bind+0x4b1/0x1140 [ 177.575690][T10028] ? hci_sock_bind+0x591/0x1140 [ 177.580553][T10028] kasan_report+0xe/0x20 [ 177.584803][T10028] check_memory_region+0x128/0x190 [ 177.589928][T10028] hci_sock_bind+0x591/0x1140 [ 177.594613][T10028] ? hci_sock_compat_ioctl+0x80/0x80 [ 177.599914][T10028] __sys_bind+0x20e/0x250 [ 177.604255][T10028] ? __ia32_sys_socketpair+0xf0/0xf0 [ 177.609557][T10028] ? __this_cpu_preempt_check+0x84/0x190 [ 177.615219][T10028] ? smp_apic_timer_interrupt+0x1b6/0x600 [ 177.621049][T10028] ? retint_kernel+0x2b/0x2b [ 177.625652][T10028] ? do_syscall_64+0xaa/0x790 [ 177.630334][T10028] ? __x64_sys_bind+0xd/0xb0 [ 177.634939][T10028] __x64_sys_bind+0x6f/0xb0 [ 177.639445][T10028] ? lockdep_hardirqs_on+0x417/0x5d0 [ 177.644764][T10028] do_syscall_64+0xf6/0x790 [ 177.649279][T10028] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 177.655169][T10028] RIP: 0033:0x4435a9 [ 177.659064][T10028] Code: e8 1c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 177.678754][T10028] RSP: 002b:00007ffd328c7b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 [ 177.687344][T10028] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004435a9 [ 177.695335][T10028] RDX: 0000000000000006 RSI: 0000000020000080 RDI: 0000000000000006 [ 177.703332][T10028] RBP: 0000000000000005 R08: 00000000000003e8 R09: 00000000000003e8 [ 177.711303][T10028] R10: 00000000000003e8 R11: 0000000000000246 R12: 0000000000dc6914 [ 177.719275][T10028] R13: 000000000000000b R14: 0000000000000000 R15: 0000000000000000 [ 177.728773][T10028] Kernel Offset: disabled [ 177.733108][T10028] Rebooting in 86400 seconds..