[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
syzkaller login: [  139.426710][ T8399] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  145.443370][ T8400] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  151.452085][ T8401] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  157.454331][ T8402] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  163.443830][ T8403] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  169.436204][ T8404] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  175.425552][ T8405] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  181.423857][ T8406] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  187.418802][ T8407] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  193.427189][ T8408] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  199.439751][ T8409] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  205.443954][ T8410] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  211.432733][ T8411] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  217.427133][ T8412] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  223.432390][ T8413] netlink: 'syz-executor006': attribute type 4 has an invalid length.
executing program
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
[  229.433831][ T8414] netlink: 'syz-executor006': attribute type 4 has an invalid length.
[  235.331843][ T8398] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff888110b7cc60 (size 32):
  comm "syz-executor006", pid 8399, jiffies 4294951212 (age 97.980s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00  ................
  backtrace:
    [<000000009236a79c>] ip_mc_add_src+0x348/0x450
    [<00000000a76a4c86>] ip_mc_source+0x3d4/0x610
    [<0000000072cbb1f5>] ip_setsockopt+0x15d8/0x1f70
    [<000000001be85f7b>] tcp_setsockopt+0x70/0x13f0
    [<000000007925c570>] __sys_setsockopt+0x1b0/0x360
    [<00000000b7f35325>] __x64_sys_setsockopt+0x22/0x30
    [<000000006d1a99be>] do_syscall_64+0x2d/0x70
    [<00000000eaf95a0d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory