Re: [PATCH net 0/4] af_unix: Fix inq_len and scm_stat.nr_fds accounting leaks

[Kuniyuki Iwashima]

On Fri, 06 Nov 2026 05:19:01 +0000, Siddharth Chintamaneni wrote:
> This series fixes receive-queue accounting leaks of u->inq_len and
> u->scm_stat.nr_fds in AF_UNIX sockets, along with selftests:
> 
> - Patch 1 fixes a u->inq_len leak in manage_oob() when an unconsumed
>   out-of-band (MSG_OOB) skb is skipped and dropped during a normal read.
> - Patch 2 fixes u->scm_stat.nr_fds leaks when an OOB skb is skipped or
>   freed in manage_oob(), unix_stream_recv_urg(), and
>   unix_stream_read_skb().
> - Patch 3 fixes a u->scm_stat.nr_fds leak in unix_dgram_disconnected()
>   when purging queued skbs from sk->sk_receive_queue on disconnect.
> - Patch 4 adds SIOCINQ and scm_fds (/proc/self/fdinfo/<fd>) checks to
>   the msg_oob and scm_rights selftests.

I planed to drop MSG_OOB support in this cycle.

Could you repost without OOB changes ?


> 
> Siddharth Chintamaneni (4):
>   af_unix: Fix inq_len leak when skipping unread OOB skb.
>   af_unix: Fix scm_stat.nr_fds leaks for OOB skb.
>   af_unix: Fix scm_stat.nr_fds leak in unix_dgram_disconnected().
>   selftest: af_unix: Test SIOCINQ and scm_fds with OOB and dgram
>     disconnect.
> 
>  net/unix/af_unix.c                            |  69 ++++++-----
>  tools/testing/selftests/net/af_unix/msg_oob.c |  12 +-
>  .../selftests/net/af_unix/scm_rights.c        | 108 ++++++++++++++++++
>  3 files changed, 161 insertions(+), 28 deletions(-)
> 
> -- 
> 2.43.0
>