[   72.807448][   T26] audit: type=1800 audit(1569275498.419:26): pid=9137 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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.
[   73.647448][   T26] kauditd_printk_skb: 2 callbacks suppressed
[   73.647458][   T26] audit: type=1800 audit(1569275499.309:29): pid=9137 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0
[   73.680630][   T26] audit: type=1800 audit(1569275499.309:30): pid=9137 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.204' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   82.656129][ T9291] 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.
[   82.693206][    T7] BUG: assuming atomic context at net/kcm/kcmsock.c:382
[   82.700637][    T7] in_atomic(): 0, irqs_disabled(): 0, pid: 7, name: kworker/u4:0
[   82.709195][    T7] 3 locks held by kworker/u4:0/7:
[   82.714248][    T7]  #0: ffff88809c474928 ((wq_completion)kstrp){+.+.}, at: process_one_work+0x88b/0x1740
[   82.730592][    T7]  #1: ffff8880a989fdc0 ((work_completion)(&strp->work)){+.+.}, at: process_one_work+0x8c1/0x1740
[   82.741274][    T7]  #2: ffff88808c422d10 (sk_lock-AF_INET){+.+.}, at: strp_sock_lock+0x2e/0x40
[   82.750382][    T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.3.0+ #0
[   82.757581][    T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   82.767947][    T7] Workqueue: kstrp strp_work
[   82.772689][    T7] Call Trace:
[   82.775981][    T7]  dump_stack+0x172/0x1f0
[   82.780311][    T7]  __cant_sleep.cold+0xa4/0xbc
[   82.785073][    T7]  kcm_parse_func_strparser+0x54/0x200
[   82.790525][    T7]  ? memset+0x32/0x40
[   82.794504][    T7]  __strp_recv+0x5dc/0x1b20
[   82.799014][    T7]  strp_recv+0xcf/0x10b
[   82.803169][    T7]  tcp_read_sock+0x285/0xa00
[   82.807753][    T7]  ? strp_process+0xf0/0xf0
[   82.812252][    T7]  ? compat_tcp_getsockopt+0x80/0x80
[   82.817533][    T7]  ? mark_held_locks+0xa4/0xf0
[   82.822576][    T7]  ? __local_bh_enable_ip+0x15a/0x270
[   82.828082][    T7]  ? lock_sock_nested+0xe2/0x120
[   82.833018][    T7]  ? compat_tcp_getsockopt+0x80/0x80
[   82.838295][    T7]  strp_read_sock+0x14d/0x200
[   82.842963][    T7]  ? strp_stop+0x40/0x40
[   82.847224][    T7]  ? lock_sock_nested+0xe2/0x120
[   82.852166][    T7]  strp_work+0xe3/0x130
[   82.85