[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.071171][ T26] audit: type=1800 audit(1569279794.249:25): pid=8645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.110318][ T26] audit: type=1800 audit(1569279794.249:26): pid=8645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.158315][ T26] audit: type=1800 audit(1569279794.259:27): pid=8645 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 '10.128.0.61' (ECDSA) to the list of known hosts. syzkaller login: [ 68.851766][ T8799] IPVS: ftp: loaded support on port[0] = 21 [ 68.906513][ T8799] chnl_net:caif_netlink_parms(): no params data found [ 68.934337][ T8799] bridge0: port 1(bridge_slave_0) entered blocking state [ 68.942420][ T8799] bridge0: port 1(bridge_slave_0) entered disabled state [ 68.950412][ T8799] device bridge_slave_0 entered promiscuous mode [ 68.958437][ T8799] bridge0: port 2(bridge_slave_1) entered blocking state [ 68.966034][ T8799] bridge0: port 2(bridge_slave_1) entered disabled state [ 68.973823][ T8799] device bridge_slave_1 entered promiscuous mode [ 68.989695][ T8799] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.001025][ T8799] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 69.019385][ T8799] team0: Port device team_slave_0 added [ 69.027093][ T8799] team0: Port device team_slave_1 added [ 69.112186][ T8799] device hsr_slave_0 entered promiscuous mode [ 69.160769][ T8799] device hsr_slave_1 entered promiscuous mode [ 69.238108][ T8799] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.245326][ T8799] bridge0: port 2(bridge_slave_1) entered forwarding state [ 69.253324][ T8799] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.260645][ T8799] bridge0: port 1(bridge_slave_0) entered forwarding state [ 69.295911][ T8799] 8021q: adding VLAN 0 to HW filter on device bond0 [ 69.308110][ T8801] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 69.318459][ T8801] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.327368][ T8801] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.335423][ T8801] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 69.347350][ T8799] 8021q: adding VLAN 0 to HW filter on device team0 [ 69.358173][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 69.366675][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.373872][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 69.385060][ T8801] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 69.393693][ T8801] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.400803][ T8801] bridge0: port 2(bridge_slave_1) entered forwarding state [ 69.418971][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 69.428211][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 69.439393][ T8801] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 69.454943][ T8799] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 69.466978][ T8799] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 69.479338][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 69.488004][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 69.496456][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 69.513683][ T8799] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 69.551218][ T8799] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. [ 69.578445][ T21] BUG: assuming atomic context at net/kcm/kcmsock.c:382 [ 69.586705][ T21] in_atomic(): 0, irqs_disabled(): 0, pid: 21, name: kworker/u4:1 [ 69.595601][ T21] 3 locks held by kworker/u4:1/21: [ 69.601062][ T21] #0: ffff8882160dae68 ((wq_completion)kstrp){+.+.}, at: process_one_work+0x88b/0x1740 [ 69.611059][ T21] #1: ffff8880a9a4fdc0 ((work_completion)(&strp->work)){+.+.}, at: process_one_work+0x8c1/0x1740 [ 69.621824][ T21] #2: ffff8880a1a421d0 (sk_lock-AF_INET){+.+.}, at: strp_sock_lock+0x2e/0x40 [ 69.630731][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.3.0+ #0 [ 69.637827][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.648008][ T21] Workqueue: kstrp strp_work [ 69.652590][ T21] Call Trace: [ 69.655887][ T21] dump_stack+0x172/0x1f0 [ 69.660252][ T21] __cant_sleep.cold+0xa4/0xbc [ 69.665029][ T21] kcm_parse_func_strparser+0x54/0x200 [ 69.670474][ T21] ? memset+0x32/0x40 [ 69.674444][ T21] __strp_recv+0x5dc/0x1b20 [ 69.678938][ T21] strp_recv+0xcf/0x10b [ 69.683085][ T21] tcp_read_sock+0x285/0xa00 [ 69.687666][ T21] ? strp_process+0xf0/0xf0 [ 69.692164][ T21] ? compat_tcp_getsockopt+0x80/0x80 [ 69.697438][ T21] ? mark_held_locks+0xa4/0xf0 [ 69.702192][ T21] ? __local_bh_enable_ip+0x15a/0x270 [ 69.708081][ T21] ? lock_sock_nested+0xe2/0x120 [ 69.713029][ T21] ? compat_tcp_getsockopt+0x80/0x80 [ 69.718316][ T21] strp_read_sock+0x14d/0x200 [ 69.723009][ T21] ? strp_stop+0x40/0x40 [ 69.727268][ T21] ? lock_sock_nested+0xe2/0x120 [ 69.732304][ T21] strp_work+0xe3/0x130 [ 69.736448][ T21] process_one_work+0x9af/0x1740 [ 69.741384][ T21] ? __schedule+0x776/0x17d0 [ 69.745992][ T21] ? pwq_dec_nr_in_flight+0x320/0x320 [ 69.751352][ T21] ? lock_acquire+0x190/0x410 [ 69.756021][ T21] worker_thread+0x98/0xe40 [ 69.760532][ T21] kthread+0x361/0x430 [