From 4672aec56d2e8edabcb74c3e2320301d106a377e Mon Sep 17 00:00:00 2001 From: Mina Almasry Date: Thu, 19 Jun 2025 17:52:38 +0000 Subject: [PATCH] netmem: fix skb_frag_address_safe with unreadable skbs skb_frag_address_safe() needs a check that the skb_frag_page exists check similar to skb_frag_address(). Cc: ap420073@gmail.com Signed-off-by: Mina Almasry Acked-by: Stanislav Fomichev Link: https://patch.msgid.link/20250619175239.3039329-1-almasrymina@google.com Signed-off-by: Jakub Kicinski --- include/linux/skbuff.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 9508968cb300a..4f6dcb37bae8a 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3665,7 +3665,13 @@ static inline void *skb_frag_address(const skb_frag_t *frag) */ static inline void *skb_frag_address_safe(const skb_frag_t *frag) { - void *ptr = page_address(skb_frag_page(frag)); + struct page *page = skb_frag_page(frag); + void *ptr; + + if (!page) + return NULL; + + ptr = page_address(page); if (unlikely(!ptr)) return NULL; -- 2.47.2