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batman-adv: frag: fix primary_if leak on failed linearization

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commit 353d2c1d54 upstream.

If the skb has a frag_list, it must be linearized before it can be split
using skb_split(). But when this step failed, it must not only free the skb
but also take care of the reference to the already found primary_if.

Cc: stable@vger.kernel.org
Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: a063f2fba3 ("batman-adv: Don't skb_split skbuffs with frag_list")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sven Eckelmann
2026-07-24 16:03:34 +02:00
committed by Greg Kroah-Hartman
parent 740542f11b
commit d2148aeee9
1 changed files with 1 additions and 1 deletions
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net/batman-adv/fragmentation.c
+1 -1
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@@ -551,7 +551,7 @@ int batadv_frag_send_packet(struct sk_buff *skb,
*/
if (skb_has_frag_list(skb) && __skb_linearize(skb)) {
ret = -ENOMEM;
goto free_skb;
goto put_primary_if;
}
/* Create one header to be copied to all fragments */