netdev - [PATCH v1 net 0/2] raw/ping: Fix locking in /proc/net/{raw,icmp}.

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Date:   Mon, 3 Apr 2023 12:49:57 -0700
From:   Kuniyuki Iwashima <kuniyu@...zon.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
CC:     Kuniyuki Iwashima <kuniyu@...zon.com>,
        Kuniyuki Iwashima <kuni1840@...il.com>,
        <netdev@...r.kernel.org>
Subject: [PATCH v1 net 0/2] raw/ping: Fix locking in /proc/net/{raw,icmp}.

The first patch fixes a NULL deref for /proc/net/raw and second one fixes
the same issue for ping sockets.

The first patch also converts hlist_nulls to hlist, but this is because
the current code uses sk_nulls_for_each() for lockless readers, instead
of sk_nulls_for_each_rcu() which adds memory barrier, but raw sockets
does not use the nulls marker nor SLAB_TYPESAFE_BY_RCU in the first place.

OTOH, the ping sockets already uses sk_nulls_for_each_rcu(), and such
conversion can be posted later for net-next.

Kuniyuki Iwashima (2):
  raw: Fix NULL deref in raw_get_next().
  ping: Fix potentail NULL deref for /proc/net/icmp.

 include/net/raw.h   |  4 ++--
 net/ipv4/ping.c     |  8 ++++----
 net/ipv4/raw.c      | 36 +++++++++++++++++++-----------------
 net/ipv4/raw_diag.c | 10 ++++------
 net/ipv6/raw.c      | 10 ++++------
 5 files changed, 33 insertions(+), 35 deletions(-)

-- 
2.30.2