[  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 '10.128.1.49' (ECDSA) to the list of known hosts.
syzkaller login: [  105.972623][   T24] audit: type=1400 audit(1598276858.891:8): avc:  denied  { execmem } for  pid=6477 comm="syz-executor714" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
executing program
executing program
executing program
executing program
executing program
[  137.748311][ T6477] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff8881251cbe00 (size 224):
  comm "syz-executor714", pid 6524, jiffies 4294949215 (age 24.960s)
  hex dump (first 32 bytes):
    a0 e4 c7 18 81 88 ff ff a0 e4 c7 18 81 88 ff ff  ................
    00 00 b2 15 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000d74be082>] __build_skb+0x1f/0x100
    [<0000000024d00fe9>] __napi_alloc_skb+0xe5/0x140
    [<00000000143d03a9>] napi_get_frags+0x3a/0x70
    [<000000008c59bf0c>] tun_get_user+0xa43/0x1660
    [<00000000b6d8b5ff>] tun_chr_write_iter+0x66/0xa0
    [<00000000857ce4c1>] new_sync_write+0x173/0x210
    [<00000000e94a1450>] vfs_write+0x21d/0x280
    [<000000000eef2d3e>] ksys_write+0x72/0x120
    [<00000000f11c608e>] do_syscall_64+0x2d/0x70
    [<0000000006d58964>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff8881251cb300 (size 224):
  comm "syz-executor714", pid 6570, jiffies 4294949783 (age 19.280s)
  hex dump (first 32 bytes):
    a0 b4 3b 25 81 88 ff ff a0 b4 3b 25 81 88 ff ff  ..;%......;%....
    00 00 b2 15 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000d74be082>] __build_skb+0x1f/0x100
    [<0000000024d00fe9>] __napi_alloc_skb+0xe5/0x140
    [<00000000143d03a9>] napi_get_frags+0x3a/0x70
    [<000000008c59bf0c>] tun_get_user+0xa43/0x1660
    [<00000000b6d8b5ff>] tun_chr_write_iter+0x66/0xa0
    [<00000000857ce4c1>] new_sync_write+0x173/0x210
    [<00000000e94a1450>] vfs_write+0x21d/0x280
    [<000000000eef2d3e>] ksys_write+0x72/0x120
    [<00000000f11c608e>] do_syscall_64+0x2d/0x70
    [<0000000006d58964>] entry_SYSCALL_64_after_hwframe+0x44/0xa9