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 '10.128.0.68' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.417503] kasan: CONFIG_KASAN_INLINE enabled [ 42.422355] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.429723] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.435942] CPU: 0 PID: 5554 Comm: syz-executor144 Not tainted 4.19.0-rc4-next-20180918+ #74 [ 42.444594] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.453943] RIP: 0010:__skb_flow_dissect+0x3b5/0x5980 [ 42.459123] Code: 48 c1 ea 03 80 3c 02 00 0f 85 a6 4d 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 77 10 49 8d be 80 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5c 4d 00 00 4d 8b b6 80 05 00 00 48 b8 00 00 00 [ 42.478291] RSP: 0018:ffff8801d8bced90 EFLAGS: 00010202 [ 42.483641] RAX: dffffc0000000000 RBX: ffff8801d8bcf160 RCX: ffffffff86124429 [ 42.490894] RDX: 00000000000000b0 RSI: ffffffff861227d8 RDI: 0000000000000580 [ 42.498155] RBP: ffff8801d8bcf4f0 R08: ffff8801d8f6e5c0 R09: ffffed003b585b57 [ 42.505415] R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: ffffffff8a5202a4 [ 42.512673] R13: ffffffff8a5202a6 R14: 0000000000000000 R15: ffff8801d9700640 [ 42.519930] FS: 0000000000b74880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 42.528139] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.534013] CR2: 000000002039a000 CR3: 00000001d846a000 CR4: 00000000001406f0 [ 42.541271] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.548531] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.555782] Call Trace: [ 42.558362] ? depot_save_stack+0x292/0x470 [ 42.562671] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 42.567761] ? skb_flow_dissect_tunnel_info+0xd80/0xd80 [ 42.573113] ? depot_save_stack+0x292/0x470 [ 42.577424] ? trace_hardirqs_off_caller+0x300/0x300 [ 42.582518] ? kasan_check_write+0x14/0x20 [ 42.586740] ? do_raw_spin_lock+0xc1/0x200 [ 42.590962] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 42.596053] ? depot_save_stack+0x292/0x470 [ 42.600369] ? save_stack+0xa9/0xd0 [ 42.603992] ? save_stack+0x43/0xd0 [ 42.607602] ? kasan_kmalloc+0xc7/0xe0 [ 42.611474] ? __kmalloc_node_track_caller+0x47/0x70 [ 42.616567] ? __kmalloc_reserve.isra.39+0x41/0xe0 [ 42.621479] ? __alloc_skb+0x150/0x770 [ 42.625354] ? alloc_skb_with_frags+0x133/0x7d0 [ 42.630005] ? sock_alloc_send_pskb+0x865/0xab0 [ 42.634657] ? unix_dgram_sendmsg+0x50b/0x1750 [ 42.639223] ? sock_sendmsg+0xd5/0x120 [ 42.643096] ? ___sys_sendmsg+0x51d/0x930 [ 42.647225] ? __sys_sendmmsg+0x246/0x6d0 [ 42.651554] ? __x64_sys_sendmmsg+0x9d/0x100 [ 42.655955] ? do_syscall_64+0x1b9/0x820 [ 42.660006] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.665362] ? print_usage_bug+0xc0/0xc0 [ 42.669408] ? check_preemption_disabled+0x48/0x200 [ 42.674516] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 42.680040] ? rcu_pm_notify+0xc0/0xc0 [ 42.683918] ? __lock_acquire+0x7ec/0x4ec0 [ 42.688142] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 42.693411] ? kasan_unpoison_shadow+0x35/0x50 [ 42.697983] ? kasan_kmalloc+0xc7/0xe0 [ 42.701869] ? mark_held_locks+0x130/0x130 [ 42.706092] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.711625] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.717163] ? __alloc_skb+0x4c1/0x770 [ 42.721034] ? skb_scrub_packet+0x490/0x490 [ 42.725343] ? mark_held_locks+0x130/0x130 [ 42.729562] ? __lock_acquire+0x7ec/0x4ec0 [ 42.733786] ? print_usage_bug+0xc0/0xc0 [ 42.737833] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.743358] ? refcount_add_not_zero_checked+0x21e/0x330 [ 42.748792] ? refcount_dec_if_one+0x180/0x180 [ 42.753465] ? alloc_skb_with_frags+0x508/0x7d0 [ 42.758125] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 42.763651] ? refcount_add_checked+0x2f/0x70 [ 42.768142] ? graph_lock+0x170/0x170 [ 42.771943] skb_get_poff+0x9b/0x1c0 [ 42.775646] ? skb_get_poff+0x9b/0x1c0 [ 42.779517] ? __skb_get_poff+0x2f0/0x2f0 [ 42.783697] ? __lock_is_held+0xb5/0x140 [ 42.787752] bpf_skb_get_pay_offset+0x15/0x20 [ 42.792357] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 42.798013] ? sk_filter_trim_cap+0x38e/0xa60 [ 42.802500] ? bpf_l3_csum_replace+0x4d0/0x4d0 [ 42.807072] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.812596] ? skb_copy_datagram_from_iter+0x451/0x660 [ 42.817855] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 42.822862] ? unix_dgram_sendmsg+0x76c/0x1750 [ 42.827433] ? unix_stream_connect+0x1270/0x1270 [ 42.832179] ? aa_af_perm+0x5a0/0x5a0 [ 42.835970] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.841627] ? _copy_from_user+0xdf/0x150 [ 42.845874] ? aa_sock_msg_perm.isra.12+0xba/0x160 [ 42.850793] ? apparmor_socket_sendmsg+0x29/0x30 [ 42.855539] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.861062] ? security_socket_sendmsg+0x94/0xc0 [ 42.865891] ? unix_stream_connect+0x1270/0x1270 [ 42.870637] ? sock_sendmsg+0xd5/0x120 [ 42.874515] ? ___sys_sendmsg+0x51d/0x930 [ 42.878650] ? release_sock+0x1ec/0x2c0 [ 42.882612] ? copy_msghdr_from_user+0x580/0x580 [ 42.887355] ? _raw_spin_unlock_bh+0x30/0x40 [ 42.891798] ? release_sock+0x1ec/0x2c0 [ 42.895763] ? bpf_prog_store_orig_filter.isra.52+0x147/0x1f0 [ 42.901638] ? __release_sock+0x3a0/0x3a0 [ 42.905830] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.911360] ? __fget_light+0x2e9/0x430 [ 42.915323] ? fget_raw+0x20/0x20 [ 42.918761] ? sock_enable_timestamp+0xe0/0xe0 [ 42.923459] ? ttwu_stat+0x5c0/0x5c0 [ 42.927194] ? find_held_lock+0x36/0x1c0 [ 42.931246] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.936877] ? sockfd_lookup_light+0xc5/0x160 [ 42.941369] ? __sys_sendmmsg+0x246/0x6d0 [ 42.945505] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 42.949825] ? aa_sock_opt_perm.isra.11+0xa1/0x130 [ 42.954749] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.960273] ? __sys_setsockopt+0x254/0x3c0 [ 42.964587] ? do_syscall_64+0x9a/0x820 [ 42.968559] ? do_syscall_64+0x9a/0x820 [ 42.973946] ? lockdep_hardirqs_on+0x421/0x5c0 [ 42.978513] ? trace_hardirqs_on+0xbd/0x310 [ 42.982828] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.988181] ? trace_hardirqs_off_caller+0x300/0x300 [ 42.993272] ? __x64_sys_sendmmsg+0x9d/0x100 [ 42.997665] ? do_syscall_64+0x1b9/0x820 [ 43.001717] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 43.007073] ? syscall_return_slowpath+0x5e0/0x5e0 [ 43.011989] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.016828] ? trace_hardirqs_off+0x310/0x310 [ 43.021308] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 43.026307] ? prepare_exit_to_usermode+0x291/0x3b0 [ 43.031309] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.036138] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.041490] Modules linked in: [ 43.045854] ---[ end trace 09dd74c843a08f69 ]--- [ 43.050631] RIP: 0010:__skb_flow_dissect+0x3b5/0x5980 [ 43.055849] Code: 48 c1 ea 03 80 3c 02 00 0f 85 a6 4d 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 77 10 49 8d be 80 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5c 4d 00 00 4d 8b b6 80 05 00 00 48 b8 00 00 00 [ 43.074785] RSP: 0018:ffff8801d8bced90 EFLAGS: 00010202 [ 43.080134] RAX: dffffc0000000000 RBX: ffff8801d8bcf160 RCX: ffffffff86124429 [ 43.087431] RDX: 00000000000000b0 RSI: ffffffff861227d8 RDI: 0000000000000580 [ 43.094724] RBP: ffff8801d8bcf4f0 R08: ffff8801d8f6e5c0 R09: ffffed003b585b57 [ 43.102015] R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: ffffffff8a5202a4 [ 43.109282] R13: ffffffff8a5202a6 R14: 0000000000000000 R15: ffff8801d9700640 [ 43.116577] FS: 0000000000b74880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 43.124896] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.130768] CR2: 000000002039a000 CR3: 00000001d846a000 CR4: 00000000001406f0 [ 43.138064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.145348] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.152636] Kernel panic - not syncing: Fatal exception [ 43.158991] Kernel Offset: disabled [ 43.162620] Rebooting in 86400 seconds..