[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.097816][ T26] audit: type=1800 audit(1577914386.189:25): pid=9055 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.118298][ T26] audit: type=1800 audit(1577914386.189:26): pid=9055 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 69.162741][ T26] audit: type=1800 audit(1577914386.189:27): pid=9055 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 '10.128.0.250' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 76.956033][ T9211] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 77.279211][ T9213] ================================================================== [ 77.287413][ T9213] BUG: KASAN: slab-out-of-bounds in bacpy+0x23/0x30 [ 77.293983][ T9213] Read of size 6 at addr ffff88809b62d208 by task kworker/u5:1/9213 [ 77.301934][ T9213] [ 77.304252][ T9213] CPU: 1 PID: 9213 Comm: kworker/u5:1 Not tainted 5.5.0-rc4-syzkaller #0 [ 77.312649][ T9213] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.322800][ T9213] Workqueue: hci0 hci_rx_work [ 77.327466][ T9213] Call Trace: [ 77.330743][ T9213] dump_stack+0x197/0x210 [ 77.335056][ T9213] ? bacpy+0x23/0x30 [ 77.338939][ T9213] print_address_description.constprop.0.cold+0xd4/0x30b [ 77.345959][ T9213] ? bacpy+0x23/0x30 [ 77.349852][ T9213] ? bacpy+0x23/0x30 [ 77.353743][ T9213] __kasan_report.cold+0x1b/0x41 [ 77.358690][ T9213] ? bacpy+0x23/0x30 [ 77.362582][ T9213] kasan_report+0x12/0x20 [ 77.366920][ T9213] check_memory_region+0x134/0x1a0 [ 77.372014][ T9213] memcpy+0x24/0x50 [ 77.375817][ T9213] bacpy+0x23/0x30 [ 77.379530][ T9213] hci_event_packet+0x506d/0xa8fb [ 77.384545][ T9213] ? hci_cmd_complete_evt+0xc350/0xc350 [ 77.390081][ T9213] ? percpu_down_write+0x3c0/0x3f0 [ 77.395192][ T9213] ? skb_dequeue+0x12e/0x180 [ 77.399774][ T9213] ? __kasan_check_read+0x11/0x20 [ 77.404793][ T9213] ? mark_lock+0xc2/0x1220 [ 77.409218][ T9213] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 77.415003][ T9213] ? skb_dequeue+0x12e/0x180 [ 77.419586][ T9213] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 77.425386][ T9213] ? lockdep_hardirqs_on+0x421/0x5e0 [ 77.430654][ T9213] ? trace_hardirqs_on+0x67/0x240 [ 77.435680][ T9213] hci_rx_work+0x4b7/0xb20 [ 77.440090][ T9213] ? hci_rx_work+0x4b7/0xb20 [ 77.444664][ T9213] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.450629][ T9213] ? trace_hardirqs_on+0x67/0x240 [ 77.455663][ T9213] process_one_work+0x9af/0x1740 [ 77.460604][ T9213] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.465992][ T9213] worker_thread+0x98/0xe40 [ 77.470495][ T9213] kthread+0x361/0x430 [ 77.474545][ T9213] ? process_one_work+0x1740/0x1740 [ 77.479723][ T9213] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 77.485425][ T9213] ret_from_fork+0x24/0x30 [ 77.489859][ T9213] [ 77.492182][ T9213] Allocated by task 9238: [ 77.496492][ T9213] save_stack+0x23/0x90 [ 77.500629][ T9213] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 77.506258][ T9213] kasan_kmalloc+0x9/0x10 [ 77.510601][ T9213] __kmalloc_node_track_caller+0x4e/0x70 [ 77.516220][ T9213] __kmalloc_reserve.isra.0+0x40/0xf0 [ 77.521582][ T9213] __alloc_skb+0x10b/0x5e0 [ 77.525994][ T9213] vhci_write+0xc4/0x470 [ 77.530218][ T9213] new_sync_write+0x4d3/0x770 [ 77.534939][ T9213] __vfs_write+0xe1/0x110 [ 77.539314][ T9213] vfs_write+0x268/0x5d0 [ 77.543548][ T9213] ksys_write+0x14f/0x290 [ 77.547998][ T9213] __ia32_sys_write+0x71/0xb0 [ 77.552672][ T9213] do_fast_syscall_32+0x27b/0xe16 [ 77.557707][ T9213] entry_SYSENTER_compat+0x70/0x7f [ 77.562908][ T9213] [ 77.565238][ T9213] Freed by task 8967: [ 77.569204][ T9213] save_stack+0x23/0x90 [ 77.573357][ T9213] __kasan_slab_free+0x102/0x150 [ 77.578282][ T9213] kasan_slab_free+0xe/0x10 [ 77.582762][ T9213] kfree+0x10a/0x2c0 [ 77.586645][ T9213] tomoyo_find_next_domain+0x76a/0x1f6c [ 77.592189][ T9213] tomoyo_bprm_check_security+0x124/0x1a0 [ 77.597899][ T9213] security_bprm_check+0x63/0xb0 [ 77.602912][ T9213] search_binary_handler+0x71/0x570 [ 77.608092][ T9213] __do_execve_file.isra.0+0x1329/0x22b0 [ 77.614160][ T9213] __x64_sys_execve+0x8f/0xc0 [ 77.618830][ T9213] do_syscall_64+0xfa/0x790 [ 77.623316][ T9213] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.629182][ T9213] [ 77.631505][ T9213] The buggy address belongs to the object at ffff88809b62d000 [ 77.631505][ T9213] which belongs to the cache kmalloc-512 of size 512 [ 77.645552][ T9213] The buggy address is located 8 bytes to the right of [ 77.645552][ T9213] 512-byte region [ffff88809b62d000, ffff88809b62d200) [ 77.659159][ T9213] The buggy address belongs to the page: [ 77.664781][ T9213] page:ffffea00026d8b40 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0x0 [ 77.673947][ T9213] raw: 00fffe0000000200 ffffea00025fcb08 ffffea00026f67c8 ffff8880aa400a80 [ 77.682519][ T9213] raw: 0000000000000000 ffff88809b62d000 0000000100000004 0000000000000000 [ 77.691086][ T9213] page dumped because: kasan: bad access detected [ 77.697477][ T9213] [ 77.699794][ T9213] Memory state around the buggy address: [ 77.705534][ T9213] ffff88809b62d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 77.713725][ T9213] ffff88809b62d180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 77.721882][ T9213] >ffff88809b62d200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 77.729931][ T9213] ^ [ 77.734254][ T9213] ffff88809b62d280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 77.742410][ T9213] ffff88809b62d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 77.750643][ T9213] ================================================================== [ 77.758691][ T9213] Disabling lock debugging due to kernel taint [ 77.765389][ T9213] Kernel panic - not syncing: panic_on_warn set ... [ 77.771980][ T9213] CPU: 1 PID: 9213 Comm: kworker/u5:1 Tainted: G B 5.5.0-rc4-syzkaller #0 [ 77.781936][ T9213] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.791988][ T9213] Workqueue: hci0 hci_rx_work [ 77.796658][ T9213] Call Trace: [ 77.799954][ T9213] dump_stack+0x197/0x210 [ 77.804423][ T9213] panic+0x2e3/0x75c [ 77.808303][ T9213] ? add_taint.cold+0x16/0x16 [ 77.812973][ T9213] ? bacpy+0x23/0x30 [ 77.816943][ T9213] ? preempt_schedule+0x4b/0x60 [ 77.821962][ T9213] ? ___preempt_schedule+0x16/0x18 [ 77.827056][ T9213] ? trace_hardirqs_on+0x5e/0x240 [ 77.832067][ T9213] ? bacpy+0x23/0x30 [ 77.835944][ T9213] end_report+0x47/0x4f [ 77.840138][ T9213] ? bacpy+0x23/0x30 [ 77.844053][ T9213] __kasan_report.cold+0xe/0x41 [ 77.848891][ T9213] ? bacpy+0x23/0x30 [ 77.853046][ T9213] kasan_report+0x12/0x20 [ 77.857367][ T9213] check_memory_region+0x134/0x1a0 [ 77.862507][ T9213] memcpy+0x24/0x50 [ 77.866306][ T9213] bacpy+0x23/0x30 [ 77.870018][ T9213] hci_event_packet+0x506d/0xa8fb [ 77.875179][ T9213] ? hci_cmd_complete_evt+0xc350/0xc350 [ 77.880710][ T9213] ? percpu_down_write+0x3c0/0x3f0 [ 77.885910][ T9213] ? skb_dequeue+0x12e/0x180 [ 77.890519][ T9213] ? __kasan_check_read+0x11/0x20 [ 77.895623][ T9213] ? mark_lock+0xc2/0x1220 [ 77.900186][ T9213] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 77.906207][ T9213] ? skb_dequeue+0x12e/0x180 [ 77.910785][ T9213] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 77.917111][ T9213] ? lockdep_hardirqs_on+0x421/0x5e0 [ 77.922384][ T9213] ? trace_hardirqs_on+0x67/0x240 [ 77.927393][ T9213] hci_rx_work+0x4b7/0xb20 [ 77.931790][ T9213] ? hci_rx_work+0x4b7/0xb20 [ 77.936377][ T9213] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.942454][ T9213] ? trace_hardirqs_on+0x67/0x240 [ 77.947478][ T9213] process_one_work+0x9af/0x1740 [ 77.952403][ T9213] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.957764][ T9213] worker_thread+0x98/0xe40 [ 77.962257][ T9213] kthread+0x361/0x430 [ 77.966308][ T9213] ? process_one_work+0x1740/0x1740 [ 77.971496][ T9213] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 77.977313][ T9213] ret_from_fork+0x24/0x30 [ 77.983259][ T9213] Kernel Offset: disabled [ 77.987586][ T9213] Rebooting in 86400 seconds..