From: Dan Carpenter dan.carpenter@linaro.org
stable inclusion from stable-v6.6.2 commit d103fb6726904e353b4773188ee3d3acb4078363 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8IW7G
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 876f8ab52363f649bcc74072157dfd7adfbabc0d ]
The prp_fill_rct() function can fail. In that situation, it frees the skb and returns NULL. Meanwhile on the success path, it returns the original skb. So it's straight forward to fix bug by using the returned value.
Fixes: 451d8123f897 ("net: prp: add packet handling support") Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Acked-by: Paolo Abeni pabeni@redhat.com Link: https://lore.kernel.org/r/57af1f28-7f57-4a96-bcd3-b7a0f2340845@moroto.mounta... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- net/hsr/hsr_forward.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c index b71dab630a87..80cdc6f6b34c 100644 --- a/net/hsr/hsr_forward.c +++ b/net/hsr/hsr_forward.c @@ -342,9 +342,7 @@ struct sk_buff *prp_create_tagged_frame(struct hsr_frame_info *frame, skb = skb_copy_expand(frame->skb_std, 0, skb_tailroom(frame->skb_std) + HSR_HLEN, GFP_ATOMIC); - prp_fill_rct(skb, frame, port); - - return skb; + return prp_fill_rct(skb, frame, port); }
static void hsr_deliver_master(struct sk_buff *skb, struct net_device *dev,