[  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 '10.128.0.104' (ECDSA) to the list of known hosts.
syzkaller login: [   44.246468][   T24] audit: type=1400 audit(1598396299.611:8): avc:  denied  { execmem } for  pid=6481 comm="syz-executor174" 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
[   69.067638][ T6481] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
[   71.267457][ T3671] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
[   75.371250][ T6481] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff8881196bf200 (size 224):
  comm "syz-executor174", pid 6527, jiffies 4294942970 (age 18.510s)
  hex dump (first 32 bytes):
    a0 74 1c 29 81 88 ff ff a0 74 1c 29 81 88 ff ff  .t.).....t.)....
    00 00 5e 19 81 88 ff ff 00 00 00 00 00 00 00 00  ..^.............
  backtrace:
    [<000000000ee79d86>] __build_skb+0x1f/0x100
    [<00000000b9abd741>] __napi_alloc_skb+0xe5/0x140
    [<00000000143a5356>] napi_get_frags+0x3a/0x70
    [<00000000305f9093>] tun_get_user+0xa43/0x1660
    [<000000000d6aabf4>] tun_chr_write_iter+0x66/0xa0
    [<00000000626837c6>] new_sync_write+0x173/0x210
    [<000000008b137e3e>] vfs_write+0x21d/0x280
    [<00000000eee352c5>] ksys_write+0x72/0x120
    [<000000001e1e910b>] do_syscall_64+0x2d/0x70
    [<00000000c10ec032>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888127fa2b00 (size 224):
  comm "syz-executor174", pid 6568, jiffies 4294943515 (age 13.060s)
  hex dump (first 32 bytes):
    a0 5c 2a 1d 81 88 ff ff a0 5c 2a 1d 81 88 ff ff  .\*......\*.....
    00 00 5e 19 81 88 ff ff 00 00 00 00 00 00 00 00  ..^.............
  backtrace:
    [<000000000ee79d86>] __build_skb+0x1f/0x100
    [<00000000b9abd741>] __napi_alloc_skb+0xe5/0x140
    [<00000000143a5356>] napi_get_frags+0x3a/0x70
    [<00000000305f9093>] tun_get_user+0xa43/0x1660
    [<000000000d6aabf4>] tun_chr_write_iter+0x66/0xa0
    [<00000000626837c6>] new_sync_write+0x173/0x210
    [<000000008b137e3e>] vfs_write+0x21d/0x280
    [<00000000eee352c5>] ksys_write+0x72/0x120
    [<000000001e1e910b>] do_syscall_64+0x2d/0x70
    [<00000000c10ec032>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888127fa2d00 (size 224):
  comm "syz-executor174", pid 6612, jiffies 4294944066 (age 7.550s)
  hex dump (first 32 bytes):
    a0 f4 b5 1a 81 88 ff ff a0 f4 b5 1a 81 88 ff ff  ................
    00 00 5e 19 81 88 ff ff 00 00 00 00 00 00 00 00  ..^.............
  backtrace:
    [<000000000ee79d86>] __build_skb+0x1f/0x100
    [<00000000b9abd741>] __napi_alloc_skb+0xe5/0x140
    [<00000000143a5356>] napi_get_frags+0x3a/0x70
    [<00000000305f9093>] tun_get_user+0xa43/0x1660
    [<000000000d6aabf4>] tun_chr_write_iter+0x66/0xa0
    [<00000000626837c6>] new_sync_write+0x173/0x210
    [<000000008b137e3e>] vfs_write+0x21d/0x280
    [<00000000eee352c5>] ksys_write+0x72/0x120
    [<000000001e1e910b>] do_syscall_64+0x2d/0x70
    [<00000000c10ec032>] entry_SYSCALL_64_after_hwframe+0x44/0xa9