INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 'ci-upstream-kasan-gce-3,10.128.0.36' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz6.router_solicitations = 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 62.659773] dev_remove_pack: ffff8801c9432a40 not found executing program executing program executing program [ 62.781269] ================================================================== [ 62.788711] BUG: KASAN: use-after-free in __netif_receive_skb_core+0x2fa3/0x3230 [ 62.796230] Read of size 2 at addr ffff8801c6e2cc80 by task syzkaller973019/9334 [ 62.803729] [ 62.805348] CPU: 0 PID: 9334 Comm: syzkaller973019 Not tainted 4.13.0-rc7+ #64 [ 62.812675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.821999] Call Trace: [ 62.824573] [ 62.826716] dump_stack+0x194/0x257 [ 62.830324] ? arch_local_irq_restore+0x53/0x53 [ 62.834970] ? show_regs_print_info+0x65/0x65 [ 62.839463] ? compat_packet_setsockopt+0x140/0x140 [ 62.844471] ? __netif_receive_skb_core+0x2fa3/0x3230 [ 62.849640] print_address_description+0x73/0x250 [ 62.854457] ? __netif_receive_skb_core+0x2fa3/0x3230 [ 62.859623] kasan_report+0x24e/0x340 [ 62.863404] __asan_report_load2_noabort+0x14/0x20 [ 62.868308] __netif_receive_skb_core+0x2fa3/0x3230 [ 62.873328] ? nf_ingress+0x980/0x980 [ 62.877141] ? find_held_lock+0x35/0x1d0 [ 62.881199] ? lock_downgrade+0x990/0x990 [ 62.885343] ? __lock_acquire+0x6ef/0x3dc0 [ 62.889554] ? find_held_lock+0x35/0x1d0 [ 62.893617] ? check_noncircular+0x20/0x20 [ 62.897830] ? is_bpf_text_address+0x7b/0x120 [ 62.902314] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 62.907502] ? __free_insn_slot+0x5c0/0x5c0 [ 62.911818] ? update_stack_state+0x700/0x700 [ 62.916296] ? find_held_lock+0x35/0x1d0 [ 62.920357] ? netif_receive_skb_internal+0x23e/0x1a50 [ 62.925611] ? lock_downgrade+0x990/0x990 [ 62.929752] ? pvclock_read_flags+0x160/0x160 [ 62.934244] ? lock_acquire+0x1d5/0x580 [ 62.938219] ? lock_acquire+0x1d5/0x580 [ 62.942172] ? netif_receive_skb_internal+0xf1/0x1a50 [ 62.947348] ? ktime_get_with_offset+0x2c1/0x420 [ 62.952086] ? lock_release+0xa40/0xa40 [ 62.956038] ? do_gettimeofday+0x190/0x190 [ 62.960260] ? check_noncircular+0x20/0x20 [ 62.964508] ? netif_receive_skb_internal+0xf1/0x1a50 [ 62.969679] __netif_receive_skb+0x2c/0x1b0 [ 62.973980] ? __netif_receive_skb+0x2c/0x1b0 [ 62.978452] ? netif_receive_skb_internal+0xf1/0x1a50 [ 62.983616] netif_receive_skb_internal+0x16a/0x1a50 [ 62.988703] ? find_held_lock+0x35/0x1d0 [ 62.992746] ? dev_queue_xmit_accel+0x30/0x30 [ 62.997223] ? dev_gro_receive+0xc3e/0x19b0 [ 63.001526] ? lock_downgrade+0x990/0x990 [ 63.005667] ? lock_release+0xa40/0xa40 [ 63.009647] ? memset+0x31/0x40 [ 63.012924] ? dev_gro_receive+0x1be/0x19b0 [ 63.017244] ? __alloc_pages_nodemask+0xd40/0xd40 [ 63.022068] ? net_rx_action+0x1910/0x1910 [ 63.026281] ? rcu_pm_notify+0xc0/0xc0 [ 63.030156] ? skb_gro_reset_offset+0x17b/0x300 [ 63.034809] napi_gro_receive+0x3d0/0x500 [ 63.038934] ? dev_gro_receive+0x19b0/0x19b0 [ 63.043317] ? eth_type_trans+0x2a3/0x650 [ 63.047440] ? eth_gro_receive+0x810/0x810 [ 63.051664] receive_buf+0xaef/0x5690 [ 63.055487] ? virtnet_set_rx_mode+0x9f0/0x9f0 [ 63.060058] ? dequeue_task_fair+0x5c10/0x5c10 [ 63.064631] ? update_curr+0x30c/0x800 [ 63.068497] ? print_usage_bug+0x480/0x480 [ 63.072706] ? print_usage_bug+0x480/0x480 [ 63.076921] ? account_entity_enqueue+0x27d/0x4e0 [ 63.081747] ? print_usage_bug+0x480/0x480 [ 63.085952] ? print_usage_bug+0x480/0x480 [ 63.090169] ? enqueue_task_fair+0x2541/0x7a10 [ 63.094759] ? print_usage_bug+0x480/0x480 [ 63.098989] ? print_usage_bug+0x480/0x480 [ 63.103200] ? dequeue_task_fair+0x5c10/0x5c10 [ 63.107768] ? __lock_acquire+0x6ef/0x3dc0 [ 63.111981] ? __lock_acquire+0x6ef/0x3dc0 [ 63.116197] ? print_usage_bug+0x480/0x480 [ 63.120412] ? __lock_acquire+0x6ef/0x3dc0 [ 63.124631] ? __lock_acquire+0x6ef/0x3dc0 [ 63.128840] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.134045] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.139223] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.144387] ? __lock_acquire+0x6ef/0x3dc0 [ 63.148602] ? print_usage_bug+0x480/0x480 [ 63.152853] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.158024] ? __lock_acquire+0x6ef/0x3dc0 [ 63.162268] ? print_usage_bug+0x480/0x480 [ 63.166476] ? print_usage_bug+0x480/0x480 [ 63.170702] ? check_noncircular+0x20/0x20 [ 63.174940] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.180106] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.185269] ? find_next_bit+0x27/0x30 [ 63.189146] ? check_noncircular+0x20/0x20 [ 63.193356] ? find_held_lock+0x35/0x1d0 [ 63.197401] ? check_noncircular+0x20/0x20 [ 63.201616] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.206799] ? find_held_lock+0x35/0x1d0 [ 63.210849] ? select_task_rq_fair+0xeba/0x2ac0 [ 63.215510] ? lock_downgrade+0x990/0x990 [ 63.219658] ? check_noncircular+0x20/0x20 [ 63.223880] ? _find_next_bit+0xee/0x120 [ 63.227923] ? update_curr+0x2cf/0x800 [ 63.231790] ? nohz_balance_exit_idle.part.86+0x70/0x70 [ 63.237126] ? select_task_rq_fair+0xed9/0x2ac0 [ 63.241778] ? __lock_is_held+0xb6/0x140 [ 63.245819] ? vring_use_dma_api+0x7f/0xa0 [ 63.250031] ? vring_unmap_one+0x49/0x3d0 [ 63.254156] ? detach_buf+0x463/0x6a0 [ 63.257929] ? check_noncircular+0x20/0x20 [ 63.262137] ? check_preempt_wakeup+0x6b1/0x1320 [ 63.266869] ? attach_entity_load_avg+0x520/0x520 [ 63.271701] ? virtqueue_get_buf_ctx+0x3b1/0x8b0 [ 63.276440] ? detach_buf+0x6a0/0x6a0 [ 63.280218] ? find_held_lock+0x35/0x1d0 [ 63.284281] virtnet_poll+0x50b/0xab0 [ 63.288052] ? print_usage_bug+0x480/0x480 [ 63.292269] ? receive_buf+0x5690/0x5690 [ 63.296314] ? net_rx_action+0x49b/0x1910 [ 63.300441] net_rx_action+0x792/0x1910 [ 63.304415] ? try_to_wake_up+0xf9/0x1600 [ 63.308551] ? napi_complete_done+0x6c0/0x6c0 [ 63.313058] ? mark_held_locks+0xaf/0x100 [ 63.317208] ? __note_gp_changes+0x8d0/0x8d0 [ 63.321599] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.326784] ? rcu_pm_notify+0xc0/0xc0 [ 63.330677] ? rcu_read_lock_sched_held+0x108/0x120 [ 63.335704] ? __raise_softirq_irqoff+0x21c/0x2c0 [ 63.340533] ? raise_softirq+0x490/0x490 [ 63.344615] ? note_gp_changes+0x650/0x650 [ 63.348854] ? print_usage_bug+0x480/0x480 [ 63.353077] ? timerqueue_add+0x1e9/0x280 [ 63.357206] ? trace_hardirqs_off+0xd/0x10 [ 63.361414] ? __napi_schedule+0x25e/0x370 [ 63.365625] ? netdev_info+0x170/0x170 [ 63.369497] ? rcu_pm_notify+0xc0/0xc0 [ 63.373384] ? check_noncircular+0x20/0x20 [ 63.377607] ? rcu_read_lock_sched_held+0x108/0x120 [ 63.382594] ? __handle_irq_event_percpu+0x308/0x9d0 [ 63.387705] ? rcu_pm_notify+0xc0/0xc0 [ 63.391587] __do_softirq+0x2f5/0xba3 [ 63.395366] ? handle_edge_irq+0x2b4/0x7c0 [ 63.399577] ? __softirqentry_text_start+0x8/0x8 [ 63.404305] ? do_raw_spin_trylock+0x190/0x190 [ 63.408879] ? handle_irq_event_percpu+0x141/0x1b0 [ 63.413783] ? native_apic_msr_write+0x30/0x80 [ 63.418371] ? __handle_irq_event_percpu+0x9d0/0x9d0 [ 63.423447] ? lapic_next_event+0x5a/0x90 [ 63.427595] ? _raw_spin_lock+0x32/0x40 [ 63.431579] ? _raw_spin_unlock+0x22/0x30 [ 63.435718] ? handle_edge_irq+0x2b4/0x7c0 [ 63.439943] irq_exit+0x1cc/0x200 [ 63.443370] do_IRQ+0xf6/0x190 [ 63.446540] ? selinux_sk_free_security+0x4f/0x60 [ 63.451359] common_interrupt+0x93/0x93 [ 63.455307] RIP: 0010:kfree+0xf7/0x250 [ 63.459178] RSP: 0000:ffff8801c681f350 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff6e [ 63.466860] RAX: 0000000000000007 RBX: ffff8801c6ef4a80 RCX: 0000000000000000 [ 63.474101] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000286 [ 63.481340] RBP: ffff8801c681f370 R08: 0000000000000001 R09: 0000000000000000 [ 63.488581] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 [ 63.495822] R13: ffff8801dac001c0 R14: ffffffff82096b3f R15: 0000000000000000 [ 63.503064] [ 63.505274] ? selinux_sk_free_security+0x4f/0x60 [ 63.510175] selinux_sk_free_security+0x4f/0x60 [ 63.514836] security_sk_free+0x48/0x80 [ 63.518791] __sk_destruct+0x606/0x910 [ 63.522672] ? sock_rfree+0x160/0x160 [ 63.526467] ? do_raw_spin_trylock+0x190/0x190 [ 63.531031] ? __lock_is_held+0xb6/0x140 [ 63.535067] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 63.540146] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 63.545146] ? trace_hardirqs_on+0xd/0x10 [ 63.549273] ? free_percpu+0x29a/0x750 [ 63.553145] ? pcpu_free_area+0x6b0/0x6b0 [ 63.557269] ? lock_release+0xa40/0xa40 [ 63.561216] ? refcount_sub_and_test+0x115/0x1b0 [ 63.565961] ? refcount_inc+0x50/0x50 [ 63.569765] ? refcount_inc+0x50/0x50 [ 63.573556] sk_destruct+0x47/0x80 [ 63.577074] __sk_free+0x57/0x230 [ 63.580504] sk_free+0x2a/0x40 [ 63.583703] packet_release+0x859/0xd70 [ 63.587682] ? packet_set_ring+0x1b70/0x1b70 [ 63.592081] ? rcu_read_lock_sched_held+0x108/0x120 [ 63.597084] ? kmem_cache_free+0x249/0x280 [ 63.601330] ? dentry_free+0xd2/0x130 [ 63.605152] ? locks_remove_file+0x414/0x560 [ 63.609553] ? fcntl_setlk+0x10c0/0x10c0 [ 63.613606] ? __fsnotify_parent+0xb4/0x3a0 [ 63.617943] ? fsnotify+0x1af0/0x1af0 [ 63.621720] ? dput.part.24+0x2a/0x740 [ 63.625586] sock_release+0x8d/0x1e0 [ 63.629269] ? sock_release+0x8d/0x1e0 [ 63.633128] ? sock_release+0x1e0/0x1e0 [ 63.637073] sock_close+0x16/0x20 [ 63.640502] __fput+0x327/0x7e0 [ 63.643765] ? fput+0x140/0x140 [ 63.647019] ? check_same_owner+0x320/0x320 [ 63.651313] ? do_raw_spin_trylock+0x190/0x190 [ 63.655870] ? check_same_owner+0x320/0x320 [ 63.660171] ____fput+0x15/0x20 [ 63.663430] task_work_run+0x18a/0x260 [ 63.667297] ? task_work_cancel+0x210/0x210 [ 63.671593] ? _raw_spin_unlock+0x22/0x30 [ 63.675718] ? switch_task_namespaces+0x87/0xc0 [ 63.680395] do_exit+0xa3a/0x1b10 [ 63.683838] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 63.688830] ? trace_hardirqs_on+0xd/0x10 [ 63.692965] ? hrtimer_try_to_cancel+0x21/0x5c0 [ 63.697612] ? mm_update_next_owner+0x930/0x930 [ 63.702256] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 63.707169] ? check_same_owner+0x320/0x320 [ 63.711470] ? check_noncircular+0x20/0x20 [ 63.715681] ? find_held_lock+0x35/0x1d0 [ 63.719730] ? __might_sleep+0x95/0x190 [ 63.723678] ? vm_mmap_pgoff+0x1ed/0x280 [ 63.727722] ? do_nanosleep+0x508/0x6f0 [ 63.731672] ? __handle_mm_fault+0x577/0x3860 [ 63.736154] ? schedule_timeout_idle+0x90/0x90 [ 63.740738] ? memset+0x31/0x40 [ 63.744007] ? hrtimer_nanosleep+0x2cc/0x860 [ 63.748429] ? nanosleep_copyout+0x100/0x100 [ 63.752827] ? __might_sleep+0x95/0x190 [ 63.756787] ? kasan_check_write+0x14/0x20 [ 63.760995] ? _copy_from_user+0x99/0x110 [ 63.765122] ? __hrtimer_init+0x140/0x140 [ 63.769254] do_group_exit+0x149/0x400 [ 63.773120] ? SyS_exit+0x30/0x30 [ 63.776547] ? trace_hardirqs_on_caller+0x421/0x5c0