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-mmots-kasan-gce-2,10.128.15.222' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 69.398594] dev_remove_pack: ffff8801d3edac00 not found executing program executing program executing program executing program [ 69.522751] ================================================================== [ 69.530193] BUG: KASAN: use-after-free in __netif_receive_skb_core+0x2be3/0x33d0 [ 69.537717] Read of size 2 at addr ffff8801cf359680 by task syzkaller107126/2995 [ 69.545243] [ 69.546858] CPU: 1 PID: 2995 Comm: syzkaller107126 Not tainted 4.13.0-mm1+ #7 [ 69.554110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.563464] Call Trace: [ 69.566040] [ 69.568182] dump_stack+0x194/0x257 [ 69.571800] ? arch_local_irq_restore+0x53/0x53 [ 69.576454] ? show_regs_print_info+0x65/0x65 [ 69.580931] ? compat_packet_setsockopt+0x140/0x140 [ 69.585921] ? __netif_receive_skb_core+0x2be3/0x33d0 [ 69.591087] print_address_description+0x73/0x250 [ 69.595910] ? __netif_receive_skb_core+0x2be3/0x33d0 [ 69.601090] kasan_report+0x24e/0x340 [ 69.604886] __asan_report_load2_noabort+0x14/0x20 [ 69.609797] __netif_receive_skb_core+0x2be3/0x33d0 [ 69.614790] ? __bpf_address_lookup+0x2b0/0x2b0 [ 69.619459] ? nf_ingress+0x9f0/0x9f0 [ 69.623244] ? unwind_dump+0x4c0/0x4c0 [ 69.627115] ? check_noncircular+0x20/0x20 [ 69.631358] ? check_noncircular+0x20/0x20 [ 69.635581] ? __kernel_text_address+0xae/0xe0 [ 69.640152] ? unwind_get_return_address+0x61/0xa0 [ 69.645068] ? __save_stack_trace+0x7e/0xd0 [ 69.649400] ? print_usage_bug+0x480/0x480 [ 69.653625] ? find_held_lock+0x39/0x1d0 [ 69.657671] ? lock_downgrade+0x990/0x990 [ 69.661795] ? save_stack+0x43/0xd0 [ 69.665411] ? lock_acquire+0x1d5/0x580 [ 69.669372] ? netif_receive_skb_internal+0x1d7/0x670 [ 69.674542] ? find_held_lock+0x39/0x1d0 [ 69.678602] ? pvclock_read_flags+0x160/0x160 [ 69.683081] ? mark_held_locks+0xb2/0x100 [ 69.687221] ? lock_acquire+0x1d5/0x580 [ 69.691171] ? netif_receive_skb_internal+0xa2/0x670 [ 69.696249] ? ktime_get_with_offset+0x2c1/0x420 [ 69.700983] ? lock_release+0xd70/0xd70 [ 69.704935] ? ktime_get+0x3a0/0x3a0 [ 69.708641] __netif_receive_skb+0x2c/0x1b0 [ 69.712937] ? __netif_receive_skb+0x2c/0x1b0 [ 69.717418] netif_receive_skb_internal+0x10b/0x670 [ 69.722424] ? dev_cpu_dead+0xb00/0xb00 [ 69.726376] ? __alloc_pages_nodemask+0xd80/0xd80 [ 69.731194] ? net_rx_action+0x1910/0x1910 [ 69.735415] ? __lock_is_held+0xbc/0x140 [ 69.739479] ? skb_gro_reset_offset+0x17b/0x300 [ 69.744135] napi_gro_receive+0x3d0/0x500 [ 69.748269] ? dev_gro_receive+0x19b0/0x19b0 [ 69.752661] ? eth_type_trans+0x2a3/0x650 [ 69.756793] ? eth_gro_receive+0x810/0x810 [ 69.761021] receive_buf+0xcc5/0x51f0 [ 69.764832] ? virtnet_set_rx_mode+0x9f0/0x9f0 [ 69.769409] ? print_usage_bug+0x480/0x480 [ 69.773638] ? __unwind_start+0x169/0x330 [ 69.777767] ? unwind_get_return_address+0x61/0xa0 [ 69.782674] ? __save_stack_trace+0x61/0xd0 [ 69.786994] ? rcu_report_qs_rnp+0x613/0x880 [ 69.791400] ? save_stack_trace+0x16/0x20 [ 69.795538] ? __lock_acquire+0x20fd/0x4620 [ 69.799835] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 69.804998] ? print_usage_bug+0x480/0x480 [ 69.809216] ? find_held_lock+0x39/0x1d0 [ 69.813267] ? __lock_acquire+0x732/0x4620 [ 69.817478] ? check_noncircular+0x20/0x20 [ 69.821705] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 69.826882] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 69.832739] ? hrtimer_interrupt+0x1d4/0x5f0 [ 69.837118] ? hrtimer_interrupt+0x1d4/0x5f0 [ 69.841503] ? __lock_is_held+0xbc/0x140 [ 69.845539] ? __x2apic_send_IPI_dest.constprop.7+0x5b/0x80 [ 69.851225] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 69.856221] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 69.861211] ? unwind_dump+0x4c0/0x4c0 [ 69.865073] ? unwind_dump+0x4c0/0x4c0 [ 69.868943] ? __unwind_start+0x169/0x330 [ 69.873075] ? unwind_get_return_address+0x61/0xa0 [ 69.877987] ? __save_stack_trace+0x61/0xd0 [ 69.882292] ? get_stack_info+0x37/0x150 [ 69.886335] ? update_stack_state+0x225/0x700 [ 69.890811] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 69.896665] ? update_stack_state+0x3eb/0x700 [ 69.901138] ? find_held_lock+0x39/0x1d0 [ 69.905184] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 69.910184] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 69.915182] ? unwind_dump+0x4c0/0x4c0 [ 69.919052] ? unwind_dump+0x4c0/0x4c0 [ 69.922919] ? pvclock_read_flags+0x160/0x160 [ 69.927394] ? __unwind_start+0x169/0x330 [ 69.931517] ? print_usage_bug+0x480/0x480 [ 69.935735] ? unwind_get_return_address+0x61/0xa0 [ 69.940646] ? __save_stack_trace+0x61/0xd0 [ 69.944950] ? update_stack_state+0x3eb/0x700 [ 69.949430] ? save_stack_trace+0x16/0x20 [ 69.953555] ? __lock_acquire+0x20fd/0x4620 [ 69.957861] ? vring_use_dma_api+0x7f/0xa0 [ 69.962079] ? vring_unmap_one+0x49/0x3d0 [ 69.966220] ? detach_buf+0x463/0x6a0 [ 69.969999] ? print_usage_bug+0x480/0x480 [ 69.974224] ? virtqueue_get_buf_ctx+0x3b1/0x8b0 [ 69.978956] ? common_interrupt+0x9d/0x9d [ 69.983080] ? detach_buf+0x6a0/0x6a0 [ 69.986872] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 69.991878] virtnet_poll+0x304/0xad0 [ 69.995679] ? receive_buf+0x51f0/0x51f0 [ 69.999717] ? unwind_dump+0x4c0/0x4c0 [ 70.003594] ? mark_held_locks+0xb2/0x100 [ 70.007722] ? net_rx_action+0x49b/0x1910 [ 70.011849] net_rx_action+0x792/0x1910 [ 70.015809] ? napi_complete_done+0x6c0/0x6c0 [ 70.020277] ? save_stack_trace+0x16/0x20 [ 70.024403] ? __lock_acquire+0x20fd/0x4620 [ 70.028705] ? rcu_start_gp_advanced+0x1e0/0x1e0 [ 70.033469] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 70.038644] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 70.043810] ? check_noncircular+0x20/0x20 [ 70.048024] ? check_noncircular+0x20/0x20 [ 70.052243] ? __lock_is_held+0xbc/0x140 [ 70.056291] ? rcu_read_lock_sched_held+0x108/0x120 [ 70.061288] ? __raise_softirq_irqoff+0x21c/0x2c0 [ 70.066113] ? raise_softirq+0x490/0x490 [ 70.070159] ? lock_downgrade+0x990/0x990 [ 70.074289] ? print_usage_bug+0x480/0x480 [ 70.078497] ? lock_acquire+0x1d5/0x580 [ 70.082451] ? clockevents_program_event+0x163/0x2e0 [ 70.087542] ? trace_hardirqs_off+0xd/0x10 [ 70.091752] ? __napi_schedule+0x25e/0x370 [ 70.095960] ? netdev_info+0x170/0x170 [ 70.099820] ? check_noncircular+0x20/0x20 [ 70.104038] ? check_noncircular+0x20/0x20 [ 70.108247] ? __lock_is_held+0xbc/0x140 [ 70.112292] ? rcu_read_lock_sched_held+0x108/0x120 [ 70.117281] ? __handle_irq_event_percpu+0x308/0x9d0 [ 70.122373] ? __lock_is_held+0xbc/0x140 [ 70.126434] __do_softirq+0x2bb/0xbd0 [ 70.130217] ? __softirqentry_text_start+0x8/0x8 [ 70.134956] ? do_raw_spin_trylock+0x190/0x190 [ 70.139515] ? handle_irq_event_percpu+0x141/0x1b0 [ 70.144426] ? __handle_irq_event_percpu+0x9d0/0x9d0 [ 70.149512] ? _raw_spin_lock+0x32/0x40 [ 70.153469] ? _raw_spin_unlock+0x22/0x30 [ 70.157593] ? handle_edge_irq+0x2b4/0x7c0 [ 70.161812] irq_exit+0x1d3/0x210 [ 70.165240] do_IRQ+0xf6/0x190 [ 70.168418] common_interrupt+0x9d/0x9d [ 70.172367] [ 70.174596] RIP: 0010:unwind_get_return_address+0x7a/0xa0 [ 70.180118] RSP: 0018:ffff8801ce00eca0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff2e [ 70.187820] RAX: dffffc0000000000 RBX: ffff8801ce00ecc0 RCX: 1ffff10039c01d00 [ 70.195071] RDX: 1ffff10039c01da1 RSI: ffff8801ce00fdd8 RDI: ffffffff813f45b7 [ 70.202319] RBP: ffff8801ce00ecb0 R08: ffff8801ce00ed00 R09: ffff8801ce00ecf8 [ 70.209571] R10: ffff8801ce00ec70 R11: 1ffff10039d56ecb R12: ffff8801ce00ed08 [ 70.216820] R13: 0000000000000000 R14: ffff8801ceab61c0 R15: ffff8801dac10940 [ 70.224087] ? SyS_clone+0x37/0x50 [ 70.227622] __save_stack_trace+0x7e/0xd0 [ 70.231755] ? SyS_clone+0x37/0x50 [ 70.235275] save_stack_trace+0x16/0x20 [ 70.239227] save_stack+0x43/0xd0 [ 70.242652] ? save_stack_trace+0x16/0x20 [ 70.246772] ? save_stack+0x43/0xd0 [ 70.250370] ? kasan_kmalloc+0xad/0xe0 [ 70.254234] ? kasan_slab_alloc+0x12/0x20 [ 70.258366] ? kmem_cache_alloc+0x12e/0x760 [ 70.262668] ? anon_vma_fork+0x16f/0x870 [ 70.266700] ? copy_mm+0xb4d/0x1310 [ 70.270306] ? copy_process.part.36+0x1eae/0x4af0 [ 70.275126] ? _do_fork+0x1ef/0xfe0 [ 70.278733] ? SyS_clone+0x37/0x50 [ 70.282244] ? do_syscall_64+0x26c/0x8c0 [ 70.286872] ? entry_SYSCALL64_slow_path+0x25/0x25 [ 70.291805] ? lock_downgrade+0x990/0x990 [ 70.295942] ? __lock_is_held+0xbc/0x140 [ 70.300001] ? check_same_owner+0x320/0x320 [ 70.304322] ? kasan_unpoison_shadow+0x35/0x50 [ 70.308879] kasan_kmalloc+0xad/0xe0 [ 70.312568] kasan_slab_alloc+0x12/0x20 [ 70.316514] kmem_cache_alloc+0x12e/0x760 [ 70.320664] anon_vma_fork+0x16f/0x870 [ 70.324541] ? copy_mm+0x8d7/0x1310 [ 70.328160] ? anon_vma_clone+0x700/0x700 [ 70.332294] ? rcu_read_lock_sched_held+0x108/0x120 [ 70.337290] ? kmem_cache_alloc+0x469/0x760 [ 70.341598] copy_mm+0xb4d/0x1310 [ 70.345048] ? list_add_tail_rcu+0x193/0x193 [ 70.349442] ? check_same_owner+0x320/0x320 [ 70.353737] ? rcu_pm_notify+0xc0/0xc0 [ 70.357603] ? copy_process.part.36+0x202f/0x4af0 [ 70.362431] ? rcu_read_lock_sched_held+0x108/0x120 [ 70.367420] ? kmem_cache_alloc+0x469/0x760 [ 70.371717] ? _raw_spin_unlock+0x22/0x30 [ 70.375851] copy_process.part.36+0x1eae/0x4af0 [ 70.380511] ? __cleanup_sighand+0x40/0x40 [ 70.384736] ? print_usage_bug+0x480/0x480 [ 70.388942] ? SyS_mkdir+0x168/0x270 [ 70.392630] ? unwind_get_return_address+0x61/0xa0 [ 70.397544] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 70.402544] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 70.407535] ? unwind_dump+0x4c0/0x4c0 [ 70.411402] ? unwind_dump+0x4c0/0x4c0 [ 70.415283] ? __unwind_start+0x169/0x330 [ 70.419415] ? unwind_get_return_address+0x61/0xa0 [ 70.424329] ? __lock_acquire+0x732/0x4620 [ 70.428546] ? SyS_mkdir+0x168/0x270 [ 70.432236] ? save_stack_trace+0x16/0x20 [ 70.436376] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 70.441560] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 70.446743] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 70.451917] ? check_noncircular+0x20/0x20 [ 70.456140] ? check_noncircular+0x20/0x20 [ 70.460346] ? print_usage_bug+0x480/0x480 [ 70.464554] ? __init_rwsem+0x12a/0x280 [ 70.468503] ? security_compute_sid+0x12c/0x18f0 [ 70.473260] ? find_held_lock+0x39/0x1d0 [ 70.477299] ? find_held_lock+0x39/0x1d0 [ 70.481330] ? fsnotify+0xb6f/0x1af0 [ 70.485026] ? check_noncircular+0x20/0x20 [ 70.489254] ? check_noncircular+0x20/0x20 [ 70.493462] ? check_noncircular+0x20/0x20 [ 70.497684] _do_fork+0x1ef/0xfe0 [ 70.501118] ? fork_idle+0x2d0/0x2d0 [ 70.504811] ? lock_downgrade+0x990/0x990 [ 70.508953] ? mnt_get_count+0x150/0x150 [ 70.512998] ? lock_release+0xd70/0xd70 [ 70.516965] ? lock_downgrade+0x990/0x990 [ 70.521099] ? lockref_put_or_lock+0x19/0x80