Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Michal Kubecek <> | Subject | [PATCH ipsec] Revert "net: af_key: add check for pfkey_broadcast in function pfkey_process" | Date | Mon, 23 May 2022 18:01:24 +0200 (CEST) |
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This reverts commit 4dc2a5a8f6754492180741facf2a8787f2c415d7.
A non-zero return value from pfkey_broadcast() does not necessarily mean an error occurred as this function returns -ESRCH when no registered listener received the message. In particular, a call with BROADCAST_PROMISC_ONLY flag and null one_sk argument can never return zero so that this commit in fact prevents processing any PF_KEY message. One visible effect is that racoon daemon fails to find encryption algorithms like aes and refuses to start.
Excluding -ESRCH return value would fix this but it's not obvious that we really want to bail out here and most other callers of pfkey_broadcast() also ignore the return value. Also, as pointed out by Steffen Klassert, PF_KEY is kind of deprecated and newer userspace code should use netlink instead so that we should only disturb the code for really important fixes.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz> --- net/key/af_key.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/net/key/af_key.c b/net/key/af_key.c index 339d95df19d3..fbb2c16693ad 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -2826,10 +2826,8 @@ static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb void *ext_hdrs[SADB_EXT_MAX]; int err; - err = pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, - BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); - if (err) - return err; + pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, + BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); memset(ext_hdrs, 0, sizeof(ext_hdrs)); err = parse_exthdrs(skb, hdr, ext_hdrs); -- 2.36.1
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