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 '10.128.0.67' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.128390] kasan: CONFIG_KASAN_INLINE enabled [ 36.133053] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.140534] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.146776] CPU: 0 PID: 5551 Comm: syz-executor610 Not tainted 4.19.0-rc4-next-20180918+ #74 [ 36.155339] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.164690] RIP: 0010:ctnetlink_alloc_filter+0xb9/0x200 [ 36.170060] Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 57 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 40 49 8d 7d 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 06 [ 36.188950] RSP: 0018:ffff8801c48f71a0 EFLAGS: 00010247 [ 36.194297] RAX: dffffc0000000000 RBX: ffff8801d7acd580 RCX: 0000000000000000 [ 36.201564] RDX: 0000000000000000 RSI: ffffffff864dfefd RDI: 0000000000000004 [ 36.208833] RBP: ffff8801c48f71b8 R08: ffff8801d957a180 R09: ffffed003b585b57 [ 36.216086] R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: ffff8801c48f7500 [ 36.223353] R13: 0000000000000000 R14: ffff8801d90ef2b8 R15: ffff8801d90ef291 [ 36.230644] FS: 0000000000a90880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 36.238943] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.244807] CR2: 0000000020000100 CR3: 00000001d9104000 CR4: 00000000001406f0 [ 36.252073] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.259347] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.266603] Call Trace: [ 36.269198] ctnetlink_start+0x10b/0x1b0 [ 36.273255] __netlink_dump_start+0x43e/0x6f0 [ 36.277740] ? ctnetlink_alloc_filter+0x200/0x200 [ 36.282571] ctnetlink_get_conntrack+0x777/0x9f0 [ 36.287312] ? ctnetlink_exp_stat_cpu_dump+0x9d0/0x9d0 [ 36.292575] ? nfnetlink_rcv_msg+0xa9a/0x10c0 [ 36.297060] ? lock_downgrade+0x900/0x900 [ 36.301192] ? check_preemption_disabled+0x48/0x200 [ 36.306195] ? ctnetlink_alloc_filter+0x200/0x200 [ 36.311051] ? ctnetlink_dump_dying+0x30/0x30 [ 36.315551] ? ctnetlink_done_list+0x90/0x90 [ 36.319970] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 36.324907] ? __lock_is_held+0xb5/0x140 [ 36.328956] ? ctnetlink_exp_stat_cpu_dump+0x9d0/0x9d0 [ 36.334222] nfnetlink_rcv_msg+0xdd3/0x10c0 [ 36.338560] ? nfnetlink_bind+0x3b0/0x3b0 [ 36.342700] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.348228] ? refcount_sub_and_test_checked+0x203/0x310 [ 36.353666] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 36.359115] ? rcu_softirq_qs+0x20/0x20 [ 36.363082] ? apparmor_cred_transfer+0x590/0x590 [ 36.367928] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.373457] netlink_rcv_skb+0x172/0x440 [ 36.377528] ? nfnetlink_bind+0x3b0/0x3b0 [ 36.381667] ? netlink_ack+0xb80/0xb80 [ 36.385542] ? __netlink_ns_capable+0x100/0x130 [ 36.390206] nfnetlink_rcv+0x1c0/0x4d0 [ 36.394081] ? nfnetlink_rcv_batch+0x19b0/0x19b0 [ 36.398847] ? kasan_check_write+0x14/0x20 [ 36.403099] netlink_unicast+0x5a5/0x760 [ 36.407157] ? netlink_attachskb+0x9a0/0x9a0 [ 36.411554] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.417081] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 36.422089] netlink_sendmsg+0xa18/0xfc0 [ 36.426145] ? netlink_unicast+0x760/0x760 [ 36.430367] ? aa_sock_msg_perm.isra.12+0xba/0x160 [ 36.435284] ? apparmor_socket_sendmsg+0x29/0x30 [ 36.440031] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.445573] ? security_socket_sendmsg+0x94/0xc0 [ 36.450319] ? netlink_unicast+0x760/0x760 [ 36.454561] sock_sendmsg+0xd5/0x120 [ 36.458264] ___sys_sendmsg+0x7fd/0x930 [ 36.462232] ? graph_lock+0x170/0x170 [ 36.466030] ? copy_msghdr_from_user+0x580/0x580 [ 36.470793] ? graph_lock+0x170/0x170 [ 36.474598] ? graph_lock+0x170/0x170 [ 36.478406] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.483948] ? __fget_light+0x2e9/0x430 [ 36.487913] ? fget_raw+0x20/0x20 [ 36.491356] ? __do_page_fault+0x6b7/0xec0 [ 36.495581] ? lock_downgrade+0x900/0x900 [ 36.499726] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 36.504654] ? kasan_check_read+0x11/0x20 [ 36.508794] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 36.514060] ? trace_hardirqs_off_caller+0x300/0x300 [ 36.519154] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.524682] ? check_preemption_disabled+0x48/0x200 [ 36.529698] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.535224] ? sockfd_lookup_light+0xc5/0x160 [ 36.539709] __sys_sendmsg+0x11d/0x280 [ 36.543636] ? __ia32_sys_shutdown+0x80/0x80 [ 36.548042] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.553574] ? do_syscall_64+0x9a/0x820 [ 36.557539] ? do_syscall_64+0x9a/0x820 [ 36.561506] ? trace_hardirqs_off_caller+0x300/0x300 [ 36.566602] __x64_sys_sendmsg+0x78/0xb0 [ 36.570667] do_syscall_64+0x1b9/0x820 [ 36.574541] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.579898] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.584814] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.589647] ? trace_hardirqs_off+0x310/0x310 [ 36.594134] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.599146] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.604682] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.609716] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.614573] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.619772] RIP: 0033:0x4400d9 [ 36.622955] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 36.641864] RSP: 002b:00007fff461c2298 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 36.649571] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9 [ 36.656833] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 [ 36.664093] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 36.671372] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401960 [ 36.678640] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000 [ 36.685913] Modules linked in: [ 36.689577] ---[ end trace 37c3db5bd5270e98 ]--- [ 36.694375] RIP: 0010:ctnetlink_alloc_filter+0xb9/0x200 [ 36.699806] Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 57 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 40 49 8d 7d 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 06 [ 36.719516] RSP: 0018:ffff8801c48f71a0 EFLAGS: 00010247 [ 36.724884] RAX: dffffc0000000000 RBX: ffff8801d7acd580 RCX: 0000000000000000 [ 36.732214] RDX: 0000000000000000 RSI: ffffffff864dfefd RDI: 0000000000000004 [ 36.739544] RBP: ffff8801c48f71b8 R08: ffff8801d957a180 R09: ffffed003b585b57 [ 36.746905] R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: ffff8801c48f7500 [ 36.754206] R13: 0000000000000000 R14: ffff8801d90ef2b8 R15: ffff8801d90ef291 [ 36.761549] FS: 0000000000a90880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 36.769964] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.775907] CR2: 0000000020000100 CR3: 00000001d9104000 CR4: 00000000001406f0 [ 36.783183] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.790564] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.797884] Kernel panic - not syncing: Fatal exception [ 36.804324] Kernel Offset: disabled [ 36.807953] Rebooting in 86400 seconds..