5.4-stable review patch. If anyone has any objections, please let me know.
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From: Mina Almasry almasrymina@google.com
[ Upstream commit 4672aec56d2e8edabcb74c3e2320301d106a377e ]
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 almasrymina@google.com Acked-by: Stanislav Fomichev sdf@fomichev.me Link: https://patch.msgid.link/20250619175239.3039329-1-almasrymina@google.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 d9abd9e6833e..101ac3d6581e 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3073,7 +3073,13 @@ 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;