[  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 '10.128.0.220' (ECDSA) to the list of known hosts.
syzkaller login: [   62.543458][   T25] audit: type=1400 audit(1598293890.856:8): avc:  denied  { execmem } for  pid=6502 comm="syz-executor071" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
executing program
executing program
[   81.138601][ T6502] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
[   83.341073][ T6502] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff888119277e00 (size 224):
  comm "syz-executor071", pid 6503, jiffies 4294944252 (age 13.540s)
  hex dump (first 32 bytes):
    a0 a4 60 1c 81 88 ff ff a0 a4 60 1c 81 88 ff ff  ..`.......`.....
    00 00 e1 24 81 88 ff ff 00 00 00 00 00 00 00 00  ...$............
  backtrace:
    [<00000000b5896191>] __build_skb+0x1f/0x100
    [<000000005a948bb0>] __napi_alloc_skb+0xe5/0x140
    [<000000003ff19060>] napi_get_frags+0x3a/0x70
    [<000000003c7f536e>] tun_get_user+0xa43/0x1660
    [<00000000c49955e6>] tun_chr_write_iter+0x66/0xa0
    [<000000007f10b55d>] new_sync_write+0x173/0x210
    [<000000008c5f60c3>] vfs_write+0x21d/0x280
    [<000000003909c732>] ksys_write+0x72/0x120
    [<000000000b3335a2>] do_syscall_64+0x2d/0x70
    [<000000005622d327>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888119277d00 (size 224):
  comm "syz-executor071", pid 6547, jiffies 4294944851 (age 7.550s)
  hex dump (first 32 bytes):
    a0 5c 07 1b 81 88 ff ff a0 5c 07 1b 81 88 ff ff  .\.......\......
    00 00 e1 24 81 88 ff ff 00 00 00 00 00 00 00 00  ...$............
  backtrace:
    [<00000000b5896191>] __build_skb+0x1f/0x100
    [<000000005a948bb0>] __napi_alloc_skb+0xe5/0x140
    [<000000003ff19060>] napi_get_frags+0x3a/0x70
    [<000000003c7f536e>] tun_get_user+0xa43/0x1660
    [<00000000c49955e6>] tun_chr_write_iter+0x66/0xa0
    [<000000007f10b55d>] new_sync_write+0x173/0x210
    [<000000008c5f60c3>] vfs_write+0x21d/0x280
    [<000000003909c732>] ksys_write+0x72/0x120
    [<000000000b3335a2>] do_syscall_64+0x2d/0x70
    [<000000005622d327>] entry_SYSCALL_64_after_hwframe+0x44/0xa9