[  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 '10.128.0.242' (ECDSA) to the list of known hosts.
syzkaller login: [   43.456416][   T24] audit: type=1400 audit(1598333574.922:8): avc:  denied  { execmem } for  pid=6451 comm="syz-executor440" 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
[   67.919332][ T6451] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff888119b22c00 (size 224):
  comm "syz-executor440", pid 6541, jiffies 4294943421 (age 12.880s)
  hex dump (first 32 bytes):
    a0 34 50 1c 81 88 ff ff a0 34 50 1c 81 88 ff ff  .4P......4P.....
    00 80 68 17 81 88 ff ff 00 00 00 00 00 00 00 00  ..h.............
  backtrace:
    [<00000000bc1cea2c>] __build_skb+0x1f/0x100
    [<00000000087c1027>] __napi_alloc_skb+0xe5/0x140
    [<00000000388a6f15>] napi_get_frags+0x3a/0x70
    [<0000000041ff1caa>] tun_get_user+0xa43/0x1660
    [<0000000091725408>] tun_chr_write_iter+0x66/0xa0
    [<0000000005484cf6>] new_sync_write+0x173/0x210
    [<00000000167cf1f3>] vfs_write+0x21d/0x280
    [<00000000ac9c20be>] ksys_write+0x72/0x120
    [<0000000079caeecc>] do_syscall_64+0x2d/0x70
    [<00000000a0967d3b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88812aa21c00 (size 1024):
  comm "syz-executor440", pid 6541, jiffies 4294943421 (age 12.880s)
  hex dump (first 32 bytes):
    db 70 93 bb d0 b6 4f e5 a6 77 84 c9 7e a2 33 c4  .p....O..w..~.3.
    08 d4 d2 80 4c 37 6a 9e 24 8e ec fa 1e 93 f6 43  ....L7j.$......C
  backtrace:
    [<000000009c818297>] pskb_expand_head+0x8e/0x480
    [<00000000dff2ea01>] tun_get_user+0xd71/0x1660
    [<0000000091725408>] tun_chr_write_iter+0x66/0xa0
    [<0000000005484cf6>] new_sync_write+0x173/0x210
    [<00000000167cf1f3>] vfs_write+0x21d/0x280
    [<00000000ac9c20be>] ksys_write+0x72/0x120
    [<0000000079caeecc>] do_syscall_64+0x2d/0x70
    [<00000000a0967d3b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9