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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/xfrm/xfrm_compat.c
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@@ -5,6 +5,7 @@
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  * Based on code and translator idea by: Florian Westphal <fw@strlen.de>
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  */
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 #include <linux/compat.h>
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+#include <linux/nospec.h>
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 #include <linux/xfrm.h>
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 #include <net/xfrm.h>
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@@ -107,7 +108,7 @@
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 	[XFRMA_ALG_COMP]	= { .len = sizeof(struct xfrm_algo) },
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 	[XFRMA_ENCAP]		= { .len = sizeof(struct xfrm_encap_tmpl) },
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 	[XFRMA_TMPL]		= { .len = sizeof(struct xfrm_user_tmpl) },
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-	[XFRMA_SEC_CTX]		= { .len = sizeof(struct xfrm_sec_ctx) },
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+	[XFRMA_SEC_CTX]		= { .len = sizeof(struct xfrm_user_sec_ctx) },
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 	[XFRMA_LTIME_VAL]	= { .len = sizeof(struct xfrm_lifetime_cur) },
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 	[XFRMA_REPLAY_VAL]	= { .len = sizeof(struct xfrm_replay_state) },
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 	[XFRMA_REPLAY_THRESH]	= { .type = NLA_U32 },
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@@ -300,7 +301,7 @@
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 	nla_for_each_attr(nla, attrs, len, remaining) {
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 		int err;
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-		switch (type) {
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+		switch (nlh_src->nlmsg_type) {
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 		case XFRM_MSG_NEWSPDINFO:
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 			err = xfrm_nla_cpy(dst, nla, nla_len(nla));
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 			break;
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@@ -435,6 +436,7 @@
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 		NL_SET_ERR_MSG(extack, "Bad attribute");
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 		return -EOPNOTSUPP;
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 	}
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+	type = array_index_nospec(type, XFRMA_MAX + 1);
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 	if (nla_len(nla) < compat_policy[type].len) {
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 		NL_SET_ERR_MSG(extack, "Attribute bad length");
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 		return -EOPNOTSUPP;