contributor-guide: recipe-style-guide: add section about CVE patches

This was previously included in the OpenEmbedded wiki page [1], but was
not ported along with the rest in commit 95c9a1e1e78bbfb82ade
(2023-09-12, Michael Opdenacker: "contributor-guide: recipe-style-guide:
add Upstream-Status").

  [1]: https://www.openembedded.org/index.php?title=Commit_Patch_Message_Guidelines&oldid=10935

Group the examples in their own sections (but name it differently from
any other section in this document so that sphinx doesn't generate a
warning about duplicate labels).

(From yocto-docs rev: 3022caa35efc28d16dea81bc81ecb48998c8f3b8)

Signed-off-by: Roland Hieber <rhi@pengutronix.de>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/documentation/contributor-guide/recipe-style-guide.rst b/documentation/contributor-guide/recipe-style-guide.rst
index 7906e5e5d9..5cbcb23b3a 100644
--- a/documentation/contributor-guide/recipe-style-guide.rst
+++ b/documentation/contributor-guide/recipe-style-guide.rst
@@ -370,3 +370,28 @@ Here's a patch that has been backported from an upstream commit::
    include missing sys/file.h for LOCK_EX
 
    Upstream-Status: Backport [https://github.com/systemd/systemd/commit/ac8db36cbc26694ee94beecc8dca208ec4b5fd45]
+
+CVE patches
+===========
+
+In order to have a better control of vulnerabilities, patches that fix CVEs must
+contain a ``CVE:`` tag. This tag list all CVEs fixed by the patch. If more than
+one CVE is fixed, separate them using spaces.
+
+CVE Examples
+------------
+
+This should be the header of patch that fixes :cve:`2015-8370` in GRUB2::
+
+   grub2: Fix CVE-2015-8370
+
+   [No upstream tracking] -- https://bugzilla.redhat.com/show_bug.cgi?id=1286966
+
+   Back to 28; Grub2 Authentication
+
+   Two functions suffer from integer underflow fault; the grub_username_get() and grub_password_get()located in
+   grub-core/normal/auth.c and lib/crypto.c respectively. This can be exploited to obtain a Grub rescue shell.
+
+   Upstream-Status: Backport [http://git.savannah.gnu.org/cgit/grub.git/commit/?id=451d80e52d851432e109771bb8febafca7a5f1f2]
+   CVE: CVE-2015-8370
+   Signed-off-by: Joe Developer <joe.developer@example.com>