From: Chenyuan Yang Date: Thu, 13 Mar 2025 19:54:41 +0000 (-0500) Subject: netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error X-Git-Tag: v6.15-rc1~160^2~17^2~3 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=778b09d91baafb13408470c721d034d6515cfa5a;p=thirdparty%2Fkernel%2Flinux.git netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error It is possible that ctx in nfqnl_build_packet_message() could be used before it is properly initialize, which is only initialized by nfqnl_get_sk_secctx(). This patch corrects this problem by initializing the lsmctx to a safe value when it is declared. This is similar to the commit 35fcac7a7c25 ("audit: Initialize lsmctx to avoid memory allocation error"). Fixes: 2d470c778120 ("lsm: replace context+len with lsm_context") Signed-off-by: Chenyuan Yang Signed-off-by: Pablo Neira Ayuso --- diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c index 5c913987901ab..8b7b39d8a1091 100644 --- a/net/netfilter/nfnetlink_queue.c +++ b/net/netfilter/nfnetlink_queue.c @@ -567,7 +567,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, enum ip_conntrack_info ctinfo = 0; const struct nfnl_ct_hook *nfnl_ct; bool csum_verify; - struct lsm_context ctx; + struct lsm_context ctx = { NULL, 0, 0 }; int seclen = 0; ktime_t tstamp;