6.1-stable review patch. If anyone has any objections, please let me know.
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From: Justin Iurman justin.iurman@uliege.be
[ Upstream commit 2c84b0aa28b9e73e8c4b4ce038269469434ae372 ]
Free the skb before returning from rpl_input when skb_cow_head() fails. Use a "drop" label and goto instructions.
Fixes: a7a29f9c361f ("net: ipv6: add rpl sr tunnel") Signed-off-by: Justin Iurman justin.iurman@uliege.be Reviewed-by: Simon Horman horms@kernel.org Link: https://patch.msgid.link/20240911174557.11536-1-justin.iurman@uliege.be Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv6/rpl_iptunnel.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/net/ipv6/rpl_iptunnel.c b/net/ipv6/rpl_iptunnel.c index 26adbe7f8a2f0..c1d0f947a7c87 100644 --- a/net/ipv6/rpl_iptunnel.c +++ b/net/ipv6/rpl_iptunnel.c @@ -263,10 +263,8 @@ static int rpl_input(struct sk_buff *skb) rlwt = rpl_lwt_lwtunnel(orig_dst->lwtstate);
err = rpl_do_srh(skb, rlwt); - if (unlikely(err)) { - kfree_skb(skb); - return err; - } + if (unlikely(err)) + goto drop;
local_bh_disable(); dst = dst_cache_get(&rlwt->cache); @@ -287,9 +285,13 @@ static int rpl_input(struct sk_buff *skb)
err = skb_cow_head(skb, LL_RESERVED_SPACE(dst->dev)); if (unlikely(err)) - return err; + goto drop;
return dst_input(skb); + +drop: + kfree_skb(skb); + return err; }
static int nla_put_rpl_srh(struct sk_buff *skb, int attrtype,