[meta-oe,3/3] cjose: Fix build with clang by initializing decoded buffer lengths

diff --git a/meta-oe/recipes-support/cjose/cjose/0001-jwk-initialize-the-decoded-buffer-lengths-up-front.patch b/meta-oe/recipes-support/cjose/cjose/0001-jwk-initialize-the-decoded-buffer-lengths-up-front.patch
new file mode 100644
index 0000000000..eace7b659f
--- /dev/null
+++ b/meta-oe/recipes-support/cjose/cjose/0001-jwk-initialize-the-decoded-buffer-lengths-up-front.patch
@@ -0,0 +1,149 @@ 
+From 5e8337d3c0ad2b19b78098f72814fbe2442226c9 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 5 Aug 2026 19:27:04 +0000
+Subject: [PATCH] jwk: initialize the decoded buffer lengths up front
+
+_cjose_jwk_import_EC() and _cjose_jwk_import_RSA() declare their
+*_buflen variables in the middle of the function, interleaved with
+error paths that goto the shared cleanup label. When an early decode
+fails, the goto jumps over the remaining declarations and the cleanup
+block then reads them uninitialized:
+
+| jwk.c:1501:9: error: variable 'dq_buflen' is used uninitialized
+|                whenever 'if' condition is true
+|                [-Werror,-Wsometimes-uninitialized]
+| jwk.c:1554:39: note: uninitialized use occurs here
+|     _cjose_cleanse_dealloc(dq_buffer, dq_buflen);
+
+_cjose_cleanse_dealloc() uses the length to wipe key material, so this
+is a real out-of-bounds write hazard on the error path, not just a
+warning. src/Makefile.am builds with -Werror, so it also breaks the
+build with clang.
+
+Declare the lengths alongside the buffers they pair with and assign
+them where they were previously initialized.
+
+Upstream-Status: Submitted [https://github.com/OpenIDC/cjose/pull/32]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ src/jwk.c | 25 ++++++++++++++-----------
+ 1 file changed, 14 insertions(+), 11 deletions(-)
+
+diff --git a/src/jwk.c b/src/jwk.c
+index 9c57a0b..58f872b 100644
+--- a/src/jwk.c
++++ b/src/jwk.c
+@@ -1371,6 +1371,9 @@ static cjose_jwk_t *_cjose_jwk_import_EC(json_t *jwk_json, cjose_err *err)
+     uint8_t *x_buffer = NULL;
+     uint8_t *y_buffer = NULL;
+     uint8_t *d_buffer = NULL;
++    size_t x_buflen = 0;
++    size_t y_buflen = 0;
++    size_t d_buflen = 0;
+
+     // get the value of the crv attribute
+     const char *crv_str = _get_json_object_string_attribute(jwk_json, CJOSE_JWK_CRV_STR, err);
+@@ -1389,7 +1392,7 @@ static cjose_jwk_t *_cjose_jwk_import_EC(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of the x coordinate
+-    size_t x_buflen = (size_t)_ec_size_for_curve(crv, err);
++    x_buflen = (size_t)_ec_size_for_curve(crv, err);
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_X_STR, &x_buffer, &x_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1397,7 +1400,7 @@ static cjose_jwk_t *_cjose_jwk_import_EC(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of the y coordinate
+-    size_t y_buflen = (size_t)_ec_size_for_curve(crv, err);
++    y_buflen = (size_t)_ec_size_for_curve(crv, err);
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_Y_STR, &y_buffer, &y_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1405,7 +1408,7 @@ static cjose_jwk_t *_cjose_jwk_import_EC(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of the private key d
+-    size_t d_buflen = (size_t)_ec_size_for_curve(crv, err);
++    d_buflen = (size_t)_ec_size_for_curve(crv, err);
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_D_STR, &d_buffer, &d_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1455,9 +1458,16 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     uint8_t *dp_buffer = NULL;
+     uint8_t *dq_buffer = NULL;
+     uint8_t *qi_buffer = NULL;
++    size_t n_buflen = 0;
++    size_t e_buflen = 0;
++    size_t d_buflen = 0;
++    size_t p_buflen = 0;
++    size_t q_buflen = 0;
++    size_t dp_buflen = 0;
++    size_t dq_buflen = 0;
++    size_t qi_buflen = 0;
+
+     // get the decoded value of n (buflen = 0 means no particular expected len)
+-    size_t n_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_N_STR, &n_buffer, &n_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1465,7 +1475,6 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of e
+-    size_t e_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_E_STR, &e_buffer, &e_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1473,7 +1482,6 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of d
+-    size_t d_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_D_STR, &d_buffer, &d_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1481,7 +1489,6 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of p
+-    size_t p_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_P_STR, &p_buffer, &p_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1489,7 +1496,6 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of q
+-    size_t q_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_Q_STR, &q_buffer, &q_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1497,7 +1503,6 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of dp
+-    size_t dp_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_DP_STR, &dp_buffer, &dp_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1505,7 +1510,6 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of dq
+-    size_t dq_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_DQ_STR, &dq_buffer, &dq_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+@@ -1513,7 +1517,6 @@ static cjose_jwk_t *_cjose_jwk_import_RSA(json_t *jwk_json, cjose_err *err)
+     }
+
+     // get the decoded value of qi
+-    size_t qi_buflen = 0;
+     if (!_decode_json_object_base64url_attribute(jwk_json, CJOSE_JWK_QI_STR, &qi_buffer, &qi_buflen, err))
+     {
+         CJOSE_ERROR(err, CJOSE_ERR_INVALID_ARG);
+--
+2.43.0
+
diff --git a/meta-oe/recipes-support/cjose/cjose_0.6.2.7.bb b/meta-oe/recipes-support/cjose/cjose_0.6.2.7.bb
index b35cf349f1..4538d33ef6 100644
--- a/meta-oe/recipes-support/cjose/cjose_0.6.2.7.bb
+++ b/meta-oe/recipes-support/cjose/cjose_0.6.2.7.bb
@@ -3,7 +3,9 @@  HOMEPAGE = "https://github.com/OpenIDC/cjose"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=7249e2f9437adfb8c88d870438042f0e"

-SRC_URI = "git://github.com/OpenIDC/cjose;protocol=https;branch=version-0.6.2.x;tag=v${PV}"
+SRC_URI = "git://github.com/OpenIDC/cjose;protocol=https;branch=version-0.6.2.x;tag=v${PV} \
+           file://0001-jwk-initialize-the-decoded-buffer-lengths-up-front.patch \
+           "

 SRCREV = "10af8915a666b50caa5500cdc3f2523b916be720"