[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 54.134118][ T26] audit: type=1800 audit(1569729113.978:25): pid=8533 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.179012][ T26] audit: type=1800 audit(1569729113.978:26): pid=8533 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 54.218382][ T26] audit: type=1800 audit(1569729113.978:27): pid=8533 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 '10.128.15.194' (ECDSA) to the list of known hosts. syzkaller login: [ 63.973950][ T8686] IPVS: ftp: loaded support on port[0] = 21 [ 64.027204][ T8686] chnl_net:caif_netlink_parms(): no params data found [ 64.054396][ T8686] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.062034][ T8686] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.069996][ T8686] device bridge_slave_0 entered promiscuous mode [ 64.077737][ T8686] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.084896][ T8686] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.092526][ T8686] device bridge_slave_1 entered promiscuous mode [ 64.108163][ T8686] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.119121][ T8686] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.137214][ T8686] team0: Port device team_slave_0 added [ 64.144587][ T8686] team0: Port device team_slave_1 added [ 64.211036][ T8686] device hsr_slave_0 entered promiscuous mode [ 64.279362][ T8686] device hsr_slave_1 entered promiscuous mode [ 64.346249][ T8686] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.353413][ T8686] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.361151][ T8686] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.368187][ T8686] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.400742][ T8686] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.413638][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.423755][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.432779][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.440560][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 64.451649][ T8686] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.472488][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.480873][ T22] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.487895][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.510414][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 64.518963][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.526116][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.534286][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 64.542771][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.551265][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 64.559401][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 64.569370][ T8686] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 64.577199][ T8688] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.595974][ T8686] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 64.633211][ T8686] 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. [ 64.660273][ T7] BUG: assuming atomic context at net/kcm/kcmsock.c:382 [ 64.667494][ T7] in_atomic(): 0, irqs_disabled(): 0, pid: 7, name: kworker/u4:0 [ 64.675495][ T7] 3 locks held by kworker/u4:0/7: [ 64.681517][ T7] #0: ffff88809c9308a8 ((wq_completion)kstrp){+.+.}, at: process_one_work+0x88b/0x1740 [ 64.691911][ T7] #1: ffff8880a989fdc0 ((work_completion)(&strp->work)){+.+.}, at: process_one_work+0x8c1/0x1740 [ 64.703485][ T7] #2: ffff88808d624d10 (sk_lock-AF_INET){+.+.}, at: strp_sock_lock+0x2e/0x40 [ 64.712415][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.3.0+ #0 [ 64.719422][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.729505][ T7] Workqueue: kstrp strp_work [ 64.734076][ T7] Call Trace: [ 64.737347][ T7] dump_stack+0x172/0x1f0 [ 64.741658][ T7] __cant_sleep.cold+0xa4/0xbc [ 64.746397][ T7] kcm_parse_func_strparser+0x54/0x200 [ 64.751838][ T7] ? memset+0x32/0x40 [ 64.755807][ T7] __strp_recv+0x5dc/0x1b20 [ 64.760295][ T7] strp_recv+0xcf/0x10b [ 64.764452][ T7] tcp_read_sock+0x285/0xa00 [ 64.769022][ T7] ? strp_process+0xf0/0xf0 [ 64.773506][ T7] ? compat_tcp_getsockopt+0x80/0x80 [ 64.778778][ T7] ? mark_held_locks+0xa4/0xf0 [ 64.783542][ T7] ? __local_bh_enable_ip+0x15a/0x270 [ 64.788917][ T7] ? lock_sock_nested+0xe2/0x120 [ 64.793845][ T7] ? compat_tcp_getsockopt+0x80/0x80 [ 64.799112][ T7] strp_read_sock+0x14d/0x200 [ 64.803766][ T7] ? strp_stop+0x40/0x40 [ 64.807989][ T7] ? lock_sock_nested+0xe2/0x120 [ 64.812911][ T7] strp_work+0xe3/0x130 [ 64.817049][ T7] process_one_work+0x9af/0x1740 [ 64.821973][ T7] ? __schedule+0x776/0x17d0 [ 64.826548][ T7] ? pwq_dec_nr_in_flight+0x320/0x320 [ 64.831899][ T7] ? l