[  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 '10.128.0.64' (ECDSA) to the list of known hosts.
syzkaller login: [   37.514343][   T24] audit: type=1400 audit(1598461186.458:8): avc:  denied  { execmem } for  pid=6462 comm="syz-executor587" 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
[   56.955911][ T6462] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
[   63.253468][ T6462] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff888118d65600 (size 224):
  comm "syz-executor587", pid 6509, jiffies 4294942308 (age 12.990s)
  hex dump (first 32 bytes):
    a0 7c 6f 1e 81 88 ff ff a0 7c 6f 1e 81 88 ff ff  .|o......|o.....
    00 40 62 15 81 88 ff ff 00 00 00 00 00 00 00 00  .@b.............
  backtrace:
    [<000000005f1f2253>] __build_skb+0x1f/0x100
    [<0000000077e4db58>] __napi_alloc_skb+0xe5/0x140
    [<00000000c54e63ed>] napi_get_frags+0x3a/0x70
    [<000000008477b6b6>] tun_get_user+0xa43/0x1660
    [<000000003e6656fb>] tun_chr_write_iter+0x66/0xa0
    [<00000000a2b422c8>] new_sync_write+0x173/0x210
    [<0000000017d87a21>] __kernel_write+0x140/0x1f0
    [<0000000001ebe711>] write_pipe_buf+0x61/0x80
    [<000000001b3e1dec>] __splice_from_pipe+0x154/0x290
    [<000000007bb49dd1>] do_splice+0x772/0x8d0
    [<0000000074135cf6>] __x64_sys_splice+0xaa/0x110
    [<000000007e2ba13a>] do_syscall_64+0x2d/0x70
    [<00000000808d4f22>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811a351900 (size 224):
  comm "syz-executor587", pid 6555, jiffies 4294942850 (age 7.570s)
  hex dump (first 32 bytes):
    a0 0c 7a 1c 81 88 ff ff a0 0c 7a 1c 81 88 ff ff  ..z.......z.....
    00 40 62 15 81 88 ff ff 00 00 00 00 00 00 00 00  .@b.............
  backtrace:
    [<000000005f1f2253>] __build_skb+0x1f/0x100
    [<0000000077e4db58>] __napi_alloc_skb+0xe5/0x140
    [<00000000c54e63ed>] napi_get_frags+0x3a/0x70
    [<000000008477b6b6>] tun_get_user+0xa43/0x1660
    [<000000003e6656fb>] tun_chr_write_iter+0x66/0xa0
    [<00000000a2b422c8>] new_sync_write+0x173/0x210
    [<0000000017d87a21>] __kernel_write+0x140/0x1f0
    [<0000000001ebe711>] write_pipe_buf+0x61/0x80
    [<000000001b3e1dec>] __splice_from_pipe+0x154/0x290
    [<000000007bb49dd1>] do_splice+0x772/0x8d0
    [<0000000074135cf6>] __x64_sys_splice+0xaa/0x110
    [<000000007e2ba13a>] do_syscall_64+0x2d/0x70
    [<00000000808d4f22>] entry_SYSCALL_64_after_hwframe+0x44/0xa9