batman-adv: dat: acquire ARP hw source only after skb realloc

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The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer
behind the skb. Variables which were pointing to the old buffer need to be
reassigned to avoid an use-after-free.

Cc: stable@vger.kernel.org
Fixes: b61ec31c85 ("batman-adv: Snoop DHCPACKs for DAT")
Signed-off-by: Sven Eckelmann <sven@narfation.org>

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Sven Eckelmann 2026-06-28 08:45:41 +02:00

parent 77880a3be8

commit 48067b2ae4

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net/batman-adv/distributed-arp-table.c

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