[....] Starting enhanced syslogd: rsyslogd[ 13.050963] audit: type=1400 audit(1516267783.301:5): avc: denied { syslog } for pid=3512 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.728004] audit: type=1400 audit(1516267789.978:6): avc: denied { map } for pid=3654 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. executing program [ 25.954532] audit: type=1400 audit(1516267796.205:7): avc: denied { map } for pid=3668 comm="syzkaller158939" path="/root/syzkaller158939166" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 25.981903] audit: type=1400 audit(1516267796.232:8): avc: denied { name_bind } for pid=3669 comm="syzkaller158939" src=20000 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 executing program executing program [ 26.000633] dccp_close: ABORT with 24 bytes unread [ 26.004512] audit: type=1400 audit(1516267796.232:9): avc: denied { node_bind } for pid=3669 comm="syzkaller158939" src=20000 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 [ 26.025964] dccp_close: ABORT with 24 bytes unread executing program executing program [ 26.031985] audit: type=1400 audit(1516267796.233:10): avc: denied { name_connect } for pid=3669 comm="syzkaller158939" dest=20000 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 [ 26.053851] dccp_close: ABORT with 24 bytes unread [ 26.084574] dccp_close: ABORT with 24 bytes unread executing program [ 26.108503] dccp_close: ABORT with 24 bytes unread executing program [ 26.132338] dccp_close: ABORT with 24 bytes unread executing program [ 26.155155] dccp_close: ABORT with 24 bytes unread executing program [ 26.176312] dccp_close: ABORT with 24 bytes unread executing program [ 26.199755] dccp_close: ABORT with 24 bytes unread executing program executing program executing program [ 26.223402] dccp_close: ABORT with 24 bytes unread executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.011657] net_ratelimit: 281 callbacks suppressed [ 31.011660] dccp_close: ABORT with 24 bytes unread [ 31.037609] dccp_close: ABORT with 24 bytes unread executing program executing program [ 31.059075] dccp_close: ABORT with 24 bytes unread [ 31.080261] dccp_close: ABORT with 24 bytes unread executing program [ 31.102388] dccp_close: ABORT with 24 bytes unread executing program [ 31.125244] dccp_close: ABORT with 24 bytes unread executing program [ 31.146354] dccp_close: ABORT with 24 bytes unread executing program [ 31.168609] dccp_close: ABORT with 24 bytes unread executing program [ 31.189774] dccp_close: ABORT with 24 bytes unread executing program executing program executing program [ 31.211274] dccp_close: ABORT with 24 bytes unread executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.022882] net_ratelimit: 270 callbacks suppressed [ 36.022886] dccp_close: ABORT with 24 bytes unread [ 36.051955] dccp_close: ABORT with 24 bytes unread executing program [ 36.076601] dccp_close: ABORT with 24 bytes unread executing program [ 36.100597] dccp_close: ABORT with 24 bytes unread executing program [ 36.124009] dccp_close: ABORT with 24 bytes unread executing program [ 36.147860] dccp_close: ABORT with 24 bytes unread executing program [ 36.171079] dccp_close: ABORT with 24 bytes unread executing program [ 36.195453] dccp_close: ABORT with 24 bytes unread executing program [ 36.219372] dccp_close: ABORT with 24 bytes unread executing program executing program [ 36.243781] dccp_close: ABORT with 24 bytes unread executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.539288] BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:425/tfrc_rx_hist_sample_rtt() [ 37.552601] CPU: 1 PID: 6246 Comm: syzkaller158939 Not tainted 4.15.0-rc8-next-20180118+ #100 [ 37.561239] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.570565] Call Trace: [ 37.573121] [ 37.575250] dump_stack+0x194/0x257 [ 37.578853] ? arch_local_irq_restore+0x53/0x53 [ 37.583494] ? tfrc_rx_handle_loss+0xb38/0x24d0 [ 37.588142] ? __lock_is_held+0xb6/0x140 [ 37.592183] tfrc_rx_hist_sample_rtt+0x407/0x4d0 [ 37.596913] ccid3_hc_rx_packet_recv+0x696/0xeb3 [ 37.601814] ? dccp_parse_options+0x3d8/0x1030 [ 37.606371] ? ccid3_hc_tx_packet_recv+0xd20/0xd20 [ 37.611273] dccp_deliver_input_to_ccids+0xd9/0x250 [ 37.616266] dccp_rcv_established+0x88/0xb0 [ 37.620570] dccp_v4_do_rcv+0x135/0x160 [ 37.624524] __sk_receive_skb+0x33e/0xc10 [ 37.628647] ? sk_free+0x40/0x40 [ 37.631991] ? inet_lhash2_lookup+0x4b0/0x4b0 [ 37.636459] ? skb_send_sock+0x50/0x50 [ 37.640320] ? mark_held_locks+0xaf/0x100 [ 37.644449] ? __update_load_avg_se.isra.27+0x56a/0x7c0 [ 37.649794] ? dccp_invalid_packet+0x55/0x7d0 [ 37.654260] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 37.659252] dccp_v4_rcv+0xf5f/0x1c80 [ 37.663053] ? dccp_v4_err+0x1550/0x1550 [ 37.667099] ? lock_release+0xa40/0xa40 [ 37.671052] ? __lock_is_held+0xb6/0x140 [ 37.675097] ip_local_deliver_finish+0x2f1/0xc50 [ 37.679825] ? iptable_mangle_hook+0xaf/0x4a0 [ 37.684296] ? ip_rcv_finish+0x1e30/0x1e30 [ 37.688507] ? nf_hook_slow+0xd3/0x1a0 [ 37.692376] ip_local_deliver+0x1ce/0x6e0 [ 37.696496] ? ip_call_ra_chain+0x6d0/0x6d0 [ 37.700796] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 37.705784] ? ipt_do_table+0xd68/0x13b0 [ 37.709818] ? check_noncircular+0x20/0x20 [ 37.714034] ? ip_rcv_finish+0x1e30/0x1e30 [ 37.718250] ip_rcv_finish+0x953/0x1e30 [ 37.722202] ? inet_del_offload+0x40/0x40 [ 37.726328] ? ip_rcv+0xf22/0x1840 [ 37.729842] ? lock_downgrade+0x980/0x980 [ 37.733969] ? nf_nat_ipv4_in+0x1cd/0x270 [ 37.738090] ? iptable_nat_ipv4_fn+0x40/0x40 [ 37.742481] ? nf_hook_slow+0xd3/0x1a0 [ 37.746344] ip_rcv+0xc5a/0x1840 [ 37.749690] ? ip_local_deliver+0x6e0/0x6e0 [ 37.753988] ? print_irqtrace_events+0x270/0x270 [ 37.758715] ? check_noncircular+0x20/0x20 [ 37.762924] ? check_noncircular+0x20/0x20 [ 37.767139] ? inet_del_offload+0x40/0x40 [ 37.771264] ? ip_local_deliver+0x6e0/0x6e0 [ 37.775561] __netif_receive_skb_core+0x1a41/0x3460 [ 37.780558] ? nf_ingress+0x9f0/0x9f0 [ 37.784331] ? __lock_acquire+0x664/0x3e00 [ 37.788543] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 37.793712] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 37.798882] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 37.804045] ? __lock_is_held+0xb6/0x140 [ 37.808088] ? check_noncircular+0x20/0x20 [ 37.812293] ? __lock_acquire+0x664/0x3e00 [ 37.816504] ? __lock_acquire+0x664/0x3e00 [ 37.820716] ? fastpath_timer_check+0x7f5/0xac0 [ 37.825363] ? update_cfs_rq_load_avg.part.68+0x2d0/0x2d0 [ 37.830886] ? check_noncircular+0x20/0x20 [ 37.835102] ? check_noncircular+0x20/0x20 [ 37.839327] ? rcu_gpnum_ovf+0x239/0x310 [ 37.843365] ? find_held_lock+0x35/0x1d0 [ 37.847403] ? lock_acquire+0x1d5/0x580 [ 37.851356] ? process_backlog+0x45f/0x740 [ 37.855566] ? lock_acquire+0x1d5/0x580 [ 37.859513] ? process_backlog+0x1ab/0x740 [ 37.863724] ? lock_release+0xa40/0xa40 [ 37.867669] ? lock_release+0xa40/0xa40 [ 37.871623] __netif_receive_skb+0x2c/0x1b0 [ 37.875917] ? __netif_receive_skb+0x2c/0x1b0 [ 37.880385] process_backlog+0x203/0x740 [ 37.884419] ? mark_held_locks+0xaf/0x100 [ 37.888536] ? check_noncircular+0x20/0x20 [ 37.892750] net_rx_action+0x792/0x1910 [ 37.896708] ? napi_complete_done+0x6c0/0x6c0 [ 37.901198] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.906200] ? __lock_is_held+0xb6/0x140 [ 37.910234] ? note_gp_changes+0x650/0x650 [ 37.914445] ? timerqueue_add+0x1e9/0x280 [ 37.918569] ? enqueue_hrtimer+0x177/0x4b0 [ 37.922774] ? lock_release+0xa40/0xa40 [ 37.926721] ? retrigger_next_event+0x1e0/0x1e0 [ 37.931363] ? __lock_is_held+0xb6/0x140 [ 37.935398] ? check_noncircular+0x20/0x20 [ 37.939607] ? print_irqtrace_events+0x270/0x270 [ 37.944340] ? clockevents_program_event+0x163/0x2e0 [ 37.949416] ? lock_downgrade+0x980/0x980 [ 37.953543] ? __lock_is_held+0xb6/0x140 [ 37.957586] ? check_noncircular+0x20/0x20 [ 37.961794] ? print_irqtrace_events+0x270/0x270 [ 37.966523] ? ktime_get+0x26f/0x3a0 [ 37.970217] ? __irqentry_text_end+0x1f8cf4/0x1f8cf4 [ 37.975299] ? do_timer+0x50/0x50 [ 37.978730] ? __lock_is_held+0xb6/0x140 [ 37.982775] __do_softirq+0x2d7/0xb85 [ 37.986547] ? task_prio+0x40/0x40 [ 37.990066] ? __irqentry_text_end+0x1f8cf4/0x1f8cf4 [ 37.995140] ? irq_exit+0xbb/0x200 [ 37.998653] ? smp_apic_timer_interrupt+0x16b/0x700 [ 38.003640] ? smp_reschedule_interrupt+0xe6/0x670 [ 38.008543] ? smp_call_function_single_interrupt+0x640/0x640 [ 38.014399] ? _raw_spin_lock+0x32/0x40 [ 38.018351] ? _raw_spin_unlock+0x22/0x30 [ 38.022471] ? handle_edge_irq+0x2b4/0x7c0 [ 38.026680] ? task_prio+0x40/0x40 [ 38.030213] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.035040] do_softirq_own_stack+0x2a/0x40 [ 38.039333] [ 38.041543] do_softirq.part.19+0x14d/0x190 [ 38.045837] ? ip_finish_output2+0x92f/0x1550 [ 38.050305] __local_bh_enable_ip+0x1ee/0x230 [ 38.054773] ip_finish_output2+0x962/0x1550 [ 38.059085] ? ip_copy_metadata+0xac0/0xac0 [ 38.063382] ? ipt_do_table+0xdd3/0x13b0 [ 38.067413] ? trace_hardirqs_on+0xd/0x10 [ 38.071541] ? ipv4_mtu+0x347/0x4c0 [ 38.075144] ? __lock_is_held+0xb6/0x140 [ 38.079186] ip_finish_output+0x864/0xd10 [ 38.083307] ? ip_finish_output+0x864/0xd10 [ 38.087610] ? ip_fragment.constprop.47+0x200/0x200 [ 38.092601] ? iptable_mangle_hook+0xaf/0x4a0 [ 38.097083] ? nf_hook_slow+0xd3/0x1a0 [ 38.100947] ip_output+0x1d2/0x860 [ 38.104460] ? ip_mc_output+0x1350/0x1350 [ 38.108598] ? ip_fragment.constprop.47+0x200/0x200 [ 38.113608] ip_local_out+0x95/0x160 [ 38.117306] ip_queue_xmit+0x8c0/0x18e0 [ 38.121258] ? ip_build_and_send_pkt+0xc30/0xc30 [ 38.125986] ? skb_send_sock+0x50/0x50 [ 38.129855] ? reqsk_fastopen_remove+0x581/0x610 [ 38.134585] ? dccp_insert_option_padding+0xad/0xd0 [ 38.139579] ? dccp_insert_options+0x20f/0xcf0 [ 38.144146] ? dccp_v4_send_check+0x187/0x3c0 [ 38.148617] dccp_transmit_skb+0x9ac/0x10f0 [ 38.152920] dccp_xmit_packet+0x215/0x740 [ 38.157047] ? dccp_send_ack+0x350/0x350 [ 38.161084] ? ccid3_hc_tx_send_packet+0x2e4/0x840 [ 38.165992] dccp_write_xmit+0x17d/0x1d0 [ 38.170040] dccp_sendmsg+0x95f/0xdc0 [ 38.173825] ? compat_dccp_getsockopt+0x70/0x70 [ 38.178474] ? rw_copy_check_uvector+0x1be/0x280 [ 38.183209] ? sock_has_perm+0x2a4/0x420 [ 38.187245] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 38.192584] ? dup_iter+0x1d2/0x260 [ 38.196188] ? kasan_check_write+0x14/0x20 [ 38.200400] inet_sendmsg+0x11f/0x5e0 [ 38.204171] ? copy_msghdr_from_user+0x3a6/0x590 [ 38.208901] ? inet_create+0xf50/0xf50 [ 38.212767] ? selinux_socket_sendmsg+0x36/0x40 [ 38.217411] ? security_socket_sendmsg+0x89/0xb0 [ 38.222138] ? inet_create+0xf50/0xf50 [ 38.225999] sock_sendmsg+0xca/0x110 [ 38.229695] ___sys_sendmsg+0x767/0x8b0 [ 38.233646] ? copy_msghdr_from_user+0x590/0x590 [ 38.238382] ? __do_page_fault+0x5f7/0xc90 [ 38.242591] ? lock_downgrade+0x980/0x980 [ 38.246717] ? __fget_light+0x297/0x380 [ 38.250664] ? fget_raw+0x20/0x20 [ 38.254091] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 38.258643] ? vmacache_find+0x5f/0x280 [ 38.262595] ? up_read+0x1a/0x40 [ 38.265934] ? __do_page_fault+0x3d6/0xc90 [ 38.270150] ? __fdget+0x18/0x20 [ 38.273504] __sys_sendmsg+0xe5/0x210 [ 38.277277] ? __sys_sendmsg+0xe5/0x210 [ 38.281225] ? SyS_shutdown+0x290/0x290 [ 38.285172] ? __do_page_fault+0xc90/0xc90 [ 38.289381] ? SyS_futex+0x269/0x390 [ 38.293064] ? fput+0xd2/0x140 [ 38.296243] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.301236] SyS_sendmsg+0x2d/0x50 [ 38.304752] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 38.309481] RIP: 0033:0x446469 [ 38.312642] RSP: 002b:00007fcecb23bda8 EFLAGS: 00000293 ORIG_RAX: 000000000000002e [ 38.320321] RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000446469 [ 38.327561] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005 [ 38.334800] RBP: 00000000006dbc38 R08: 0000000000000000 R09: 0000000000000000 executing program executing program [ 38.342041] R10: 0000000000000000 R11: 0000000000000293 R12: f8e4cbe49e572d45 [ 38.349281] R13: 54c1b85d98aba1df R14: a6eaa24dbeb18c29 R15: 000000000000000c executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program