[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.542922][ T26] audit: type=1800 audit(1574307028.147:25): pid=8779 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.585532][ T26] audit: type=1800 audit(1574307028.147:26): pid=8779 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.638013][ T26] audit: type=1800 audit(1574307028.147:27): pid=8779 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.0.235' (ECDSA) to the list of known hosts. syzkaller login: [ 69.698692][ T8932] IPVS: ftp: loaded support on port[0] = 21 [ 69.763469][ T8932] chnl_net:caif_netlink_parms(): no params data found [ 69.793255][ T8932] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.801123][ T8932] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.809111][ T8932] device bridge_slave_0 entered promiscuous mode [ 69.817707][ T8932] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.824815][ T8932] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.832770][ T8932] device bridge_slave_1 entered promiscuous mode [ 69.851143][ T8932] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.862106][ T8932] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 69.882299][ T8932] team0: Port device team_slave_0 added [ 69.889826][ T8932] team0: Port device team_slave_1 added [ 69.957341][ T8932] device hsr_slave_0 entered promiscuous mode [ 70.006489][ T8932] device hsr_slave_1 entered promiscuous mode [ 70.138543][ T8932] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.145816][ T8932] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.153713][ T8932] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.161161][ T8932] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.377941][ T8932] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.400929][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.425928][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.465813][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.486628][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 70.523832][ T8932] 8021q: adding VLAN 0 to HW filter on device team0 [ 70.561332][ T3243] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 70.570853][ T3243] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.578051][ T3243] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.636450][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 70.648530][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.655654][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.707948][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 70.736774][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 70.765815][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 70.780139][ T8932] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 70.816572][ T8932] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 70.848034][ T3243] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 70.863204][ T3243] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 70.904862][ T3243] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 70.914313][ T3243] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 70.931378][ T8932] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 72.228041][ C0] vcan0: j1939_tp_rxtimer: 0x00000000e5dde667: rx timeout, send abort [ 72.237052][ C0] vcan0: j1939_xtp_rx_abort_one: 0x00000000e5dde667: 0x00000: (3) A timeout occurred and this is the connection abort to close the session. [ 72.251922][ C0] ------------[ cut here ]------------ [ 72.257526][ C0] WARNING: CPU: 0 PID: 9 at net/can/j1939/socket.c:180 j1939_sk_queue_activate_next+0x359/0x460 [ 72.267935][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 72.274505][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.4.0-rc8-syzkaller #0 [ 72.282555][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.292597][ C0] Call Trace: [ 72.295888][ C0] dump_stack+0x197/0x210 [ 72.300227][ C0] ? j1939_sk_queue_activate_next+0x280/0x460 [ 72.306297][ C0] panic+0x2e3/0x75c [ 72.310182][ C0] ? add_taint.cold+0x16/0x16 [ 72.314840][ C0] ? printk+0xba/0xed [ 72.318893][ C0] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 72.324336][ C0] ? __warn.cold+0x14/0x35 [ 72.328734][ C0] ? __warn+0xd9/0x1d0 [ 72.332787][ C0] ? j1939_sk_queue_activate_next+0x359/0x460 [ 72.338839][ C0] __warn.cold+0x2f/0x35 [ 72.343063][ C0] ? report_bug.cold+0x63/0xad [ 72.347817][ C0] ? j1939_sk_queue_activate_next+0x359/0x460 [ 72.354085][ C0] report_bug+0x289/0x300 [ 72.358419][ C0] do_error_trap+0x11b/0x200 [ 72.363012][ C0] do_invalid_op+0x37/0x50 [ 72.367424][ C0] ? j1939_sk_queue_activate_next+0x359/0x460 [ 72.373512][ C0] invalid_op+0x23/0x30 [ 72.377670][ C0] RIP: 0010:j1939_sk_queue_activate_next+0x359/0x460 [ 72.384343][ C0] Code: e8 1c 83 c0 0a 89 45 cc eb 9f 48 c7 c7 b4 aa c6 89 e8 3b 15 2f fb e9 6a fd ff ff e8 31 15 2f fb e9 19 fe ff ff e8 d7 a9 f3 fa <0f> 0b 48 8b 45 c0 48 8d b8 b0 00 00 00 48 89 f8 48 c1 e8 03 42 0f [ 72.403953][ C0] RSP: 0018:ffff8880a98af918 EFLAGS: 00010206 [ 72.410009][ C0] RAX: ffff8880a98a2240 RBX: ffff88809668a000 RCX: ffffffff867fac38 [ 72.417979][ C0] RDX: 0000000000000100 RSI: ffffffff867facd9 RDI: 0000000000000005 [ 72.425934][ C0] RBP: ffff8880a98af970 R08: ffff8880a98a2240 R09: fffffbfff14f014c [ 72.433922][ C0] R10: fffffbfff14f014b R11: ffffffff8a780a5f R12: ffff88809668a510 [ 72.441900][ C0] R13: ffff88808d5ee400 R14: ffff88809668a548 R15: dffffc0000000000 [ 72.449910][ C0] ? j1939_sk_queue_activate_next+0x2b8/0x460 [ 72.455991][ C0] ? j1939_sk_queue_activate_next+0x359/0x460 [ 72.462059][ C0] ? j1939_sk_queue_activate_next+0x359/0x460 [ 72.468117][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 72.473501][ C0] j1939_session_deactivate_activate_next+0x3d/0x50 [ 72.480116][ C0] j1939_xtp_rx_abort_one.cold+0x21a/0x35e [ 72.486068][ C0] ? j1939_ecu_get_by_addr_locked+0x63/0xf0 [ 72.491972][ C0] j1939_tp_recv+0x783/0x9b0 [ 72.496569][ C0] j1939_can_recv+0x502/0x610 [ 72.501436][ C0] can_rcv_filter+0x292/0x8e0 [ 72.506104][ C0] can_receive+0x2e7/0x530 [ 72.510505][ C0] can_rcv+0x133/0x1b0 [ 72.514557][ C0] ? can_receive+0x530/0x530 [ 72.519150][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 72.525034][ C0] ? __netif_receive_skb_core+0x3450/0x3450 [ 72.531187][ C0] ? lock_acquire+0x190/0x410 [ 72.535857][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.542110][ C0] __netif_receive_skb+0x2c/0x1d0 [ 72.547158][ C0] process_backlog+0x206/0x750 [ 72.551901][ C0] ? net_rx_action+0x27b/0x1120 [ 72.556740][ C0] ? lockdep_hardirqs_on+0x19e/0x5e0 [ 72.562011][ C0] net_rx_action+0x508/0x1120 [ 72.566698][ C0] ? napi_busy_loop+0x970/0x970 [ 72.571566][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 72.577117][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 72.583099][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.589352][ C0] __do_softirq+0x262/0x98c [ 72.593879][ C0] ? takeover_tasklets+0x820/0x820 [ 72.598989][ C0] run_ksoftirqd+0x8e/0x110 [ 72.603604][ C0] smpboot_thread_fn+0x6a3/0xa40 [ 72.608534][ C0] ? smpboot_register_percpu_thread+0x390/0x390 [ 72.615040][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 72.621264][ C0] ? __kthread_parkme+0x108/0x1c0 [ 72.626272][ C0] ? __kasan_check_read+0x11/0x20 [ 72.631400][ C0] kthread+0x361/0x430 [ 72.635482][ C0] ? smpboot_register_percpu_thread+0x390/0x390 [ 72.641871][ C0] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 72.647587][ C0] ret_from_fork+0x24/0x30 [ 72.653672][ C0] Kernel Offset: disabled [ 72.658087][ C0] Rebooting in 86400 seconds..