openssl: Backport fix for OpenSSL 3.5.2 and 3.0.17 regression

Fixes segmentation faults in openssl. This problem was introduced in
version 3.5.2 and 3.0.17. Backport a fix from the OpenSSL 3.0 branch.

Link: https://forum.openwrt.org/t/openssl-3-0-17-libcrypto-segmentation-faults-regression/240650/9
Link: https://github.com/openssl/openssl/issues/28171
Link: https://github.com/openssl/openssl/commit/c0d968f0ac56ad507ab0101e537e7d530e9f0448
Fixes: f68c3e5057ab ("openssl: Update to version 3.0.17")
Link: https://github.com/openwrt/openwrt/pull/20069
Signed-off-by: Hauke Mehrtens <[email protected]>
(cherry picked from commit aa3c98f82173c04eea4932474116a5befb7aba7b)

package/libs/openssl/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=openssl
 PKG_VERSION:=3.0.17
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_BUILD_FLAGS:=no-mips16 gc-sections no-lto
 
 PKG_BUILD_PARALLEL:=1

package/libs/openssl/patches/0001-Don-t-keep-the-store-open-in-by_store_ctrl_ex.patch

@@ -0,0 +1,127 @@
+From c0d968f0ac56ad507ab0101e537e7d530e9f0448 Mon Sep 17 00:00:00 2001
+From: Matt Caswell <[email protected]>
+Date: Thu, 7 Aug 2025 17:50:17 +0100
+Subject: [PATCH] Don't keep the store open in by_store_ctrl_ex
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Previously #27529 made a change to `by_store_ctrl_ex` in order to open
+the OSSL_STORE early. The reason given in that PR is:
+
+"This way, we can call OSSL_STORE_open_ex() in by_store_ctrl_ex(), and
+get to see possible errors when the URI is loaded"
+
+That PR then kept the store open until cache_objects is called and then
+reused it. Unfortunately by the time cache_objects() is called we could be
+in a multi-threaded scenario where the X509_STORE is being shared by
+multiple threads. We then get a race condition where multiple threads are
+all using (and ultimately closing) the same `OSSL_STORE_CTX`.
+
+The purpose of keeping the `OSSL_STORE` object between by_store_ctrl_ex()
+and `cache_objects` is presumably an optimisation to avoid having to open
+the store twice. But this does not work because of the above issue.
+
+We just take the hit and open it again.
+
+Fixes #28171
+
+Reviewed-by: Tomas Mraz <[email protected]>
+Reviewed-by: Saša Nedvědický <[email protected]>
+(Merged from https://github.com/openssl/openssl/pull/28385)
+---
+ crypto/x509/by_store.c | 26 +++++++++++++-------------
+ 1 file changed, 13 insertions(+), 13 deletions(-)
+
+--- a/crypto/x509/by_store.c
++++ b/crypto/x509/by_store.c
+@@ -17,7 +17,6 @@ typedef struct cached_store_st {
+     char *uri;
+     OSSL_LIB_CTX *libctx;
+     char *propq;
+-    OSSL_STORE_CTX *ctx;
+ } CACHED_STORE;
+ 
+ DEFINE_STACK_OF(CACHED_STORE)
+@@ -27,14 +26,12 @@ static int cache_objects(X509_LOOKUP *lc
+                          const OSSL_STORE_SEARCH *criterion, int depth)
+ {
+     int ok = 0;
+-    OSSL_STORE_CTX *ctx = store->ctx;
++    OSSL_STORE_CTX *ctx;
+     X509_STORE *xstore = X509_LOOKUP_get_store(lctx);
+ 
+-    if (ctx == NULL
+-        && (ctx = OSSL_STORE_open_ex(store->uri, store->libctx, store->propq,
+-                                     NULL, NULL, NULL, NULL, NULL)) == NULL)
++    if ((ctx = OSSL_STORE_open_ex(store->uri, store->libctx, store->propq,
++                                  NULL, NULL, NULL, NULL, NULL)) == NULL)
+         return 0;
+-    store->ctx = ctx;
+ 
+     /*
+      * We try to set the criterion, but don't care if it was valid or not.
+@@ -79,7 +76,6 @@ static int cache_objects(X509_LOOKUP *lc
+                 substore.uri = (char *)OSSL_STORE_INFO_get0_NAME(info);
+                 substore.libctx = store->libctx;
+                 substore.propq = store->propq;
+-                substore.ctx = NULL;
+                 ok = cache_objects(lctx, &substore, criterion, depth - 1);
+             }
+         } else {
+@@ -105,7 +101,6 @@ static int cache_objects(X509_LOOKUP *lc
+             break;
+     }
+     OSSL_STORE_close(ctx);
+-    store->ctx = NULL;
+ 
+     return ok;
+ }
+@@ -114,7 +109,6 @@ static int cache_objects(X509_LOOKUP *lc
+ static void free_store(CACHED_STORE *store)
+ {
+     if (store != NULL) {
+-        OSSL_STORE_close(store->ctx);
+         OPENSSL_free(store->uri);
+         OPENSSL_free(store->propq);
+         OPENSSL_free(store);
+@@ -148,6 +142,7 @@ static int by_store_ctrl_ex(X509_LOOKUP
+         {
+             STACK_OF(CACHED_STORE) *stores = X509_LOOKUP_get_method_data(ctx);
+             CACHED_STORE *store = OPENSSL_zalloc(sizeof(*store));
++            OSSL_STORE_CTX *sctx;
+ 
+             if (store == NULL) {
+                 return 0;
+@@ -157,14 +152,20 @@ static int by_store_ctrl_ex(X509_LOOKUP
+             store->libctx = libctx;
+             if (propq != NULL)
+                 store->propq = OPENSSL_strdup(propq);
+-            store->ctx = OSSL_STORE_open_ex(argp, libctx, propq, NULL, NULL,
+-                                           NULL, NULL, NULL);
+-            if (store->ctx == NULL
++            /*
++             * We open this to check for errors now - so we can report those
++             * errors early.
++             */
++            sctx = OSSL_STORE_open_ex(argp, libctx, propq, NULL, NULL,
++                                      NULL, NULL, NULL);
++            if (sctx == NULL
+                 || (propq != NULL && store->propq == NULL)
+                 || store->uri == NULL) {
++                OSSL_STORE_close(sctx);
+                 free_store(store);
+                 return use_default;
+             }
++            OSSL_STORE_close(sctx);
+ 
+             if (stores == NULL) {
+                 stores = sk_CACHED_STORE_new_null();
+@@ -184,7 +185,6 @@ static int by_store_ctrl_ex(X509_LOOKUP
+         store.uri = (char *)argp;
+         store.libctx = libctx;
+         store.propq = (char *)propq;
+-        store.ctx = NULL;
+         return cache_objects(ctx, &store, NULL, 0);
+     }
+     default: