[  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.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.103' (ECDSA) to the list of known hosts.
syzkaller login: [   49.752617][   T24] audit: type=1400 audit(1597905948.539:8): avc:  denied  { execmem } for  pid=6453 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
[   63.786014][ T6453] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
[   70.062444][ T6453] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff88811c7b1200 (size 224):
  comm "syz-executor440", pid 6455, jiffies 4294942988 (age 13.010s)
  hex dump (first 32 bytes):
    a0 9c 30 1a 81 88 ff ff a0 9c 30 1a 81 88 ff ff  ..0.......0.....
    00 80 2d 17 81 88 ff ff 00 00 00 00 00 00 00 00  ..-.............
  backtrace:
    [<00000000be698c95>] __build_skb+0x1f/0x100
    [<000000003cc15849>] __napi_alloc_skb+0xe5/0x140
    [<0000000096e9a2ba>] napi_get_frags+0x3a/0x70
    [<0000000000c04d37>] tun_get_user+0xa43/0x1660
    [<000000004e9dce91>] tun_chr_write_iter+0x66/0xa0
    [<00000000b471dea0>] new_sync_write+0x173/0x210
    [<00000000b36e280d>] __kernel_write+0x140/0x1f0
    [<00000000eb03c455>] write_pipe_buf+0x61/0x80
    [<0000000077301682>] __splice_from_pipe+0x154/0x290
    [<0000000027545758>] do_splice+0x772/0x8d0
    [<000000008411fa75>] __x64_sys_splice+0xaa/0x110
    [<0000000028f65f16>] do_syscall_64+0x2d/0x70
    [<00000000d99fe977>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118db0300 (size 224):
  comm "syz-executor440", pid 6501, jiffies 4294943534 (age 7.550s)
  hex dump (first 32 bytes):
    a0 f4 ab 18 81 88 ff ff a0 f4 ab 18 81 88 ff ff  ................
    00 80 2d 17 81 88 ff ff 00 00 00 00 00 00 00 00  ..-.............
  backtrace:
    [<00000000be698c95>] __build_skb+0x1f/0x100
    [<000000003cc15849>] __napi_alloc_skb+0xe5/0x140
    [<0000000096e9a2ba>] napi_get_frags+0x3a/0x70
    [<0000000000c04d37>] tun_get_user+0xa43/0x1660
    [<000000004e9dce91>] tun_chr_write_iter+0x66/0xa0
    [<00000000b471dea0>] new_sync_write+0x173/0x210
    [<00000000b36e280d>] __kernel_write+0x140/0x1f0
    [<00000000eb03c455>] write_pipe_buf+0x61/0x80
    [<0000000077301682>] __splice_from_pipe+0x154/0x290
    [<0000000027545758>] do_splice+0x772/0x8d0
    [<000000008411fa75>] __x64_sys_splice+0xaa/0x110
    [<0000000028f65f16>] do_syscall_64+0x2d/0x70
    [<00000000d99fe977>] entry_SYSCALL_64_after_hwframe+0x44/0xa9