From 4c7bfa8abe03620105a207f74529e07b5ad4ae7d Mon Sep 17 00:00:00 2001 From: Marta Rybczynska Date: Fri, 18 Feb 2022 11:05:36 +0100 Subject: grub: add a fix for a memory leak This patch fixes a memory leak in grub's syslinux parsing. It is a part of a security series [1]. [1] https://lists.gnu.org/archive/html/grub-devel/2021-03/msg00007.html (From OE-Core rev: a9d0155842f0582a0d247c81bf972661f0a2cda8) Signed-off-by: Marta Rybczynska Signed-off-by: Steve Sakoman Signed-off-by: Richard Purdie --- ...28-syslinux-Fix-memory-leak-while-parsing.patch | 43 ++++++++++++++++++++++ meta/recipes-bsp/grub/grub2.inc | 1 + 2 files changed, 44 insertions(+) create mode 100644 meta/recipes-bsp/grub/files/0028-syslinux-Fix-memory-leak-while-parsing.patch (limited to 'meta/recipes-bsp') diff --git a/meta/recipes-bsp/grub/files/0028-syslinux-Fix-memory-leak-while-parsing.patch b/meta/recipes-bsp/grub/files/0028-syslinux-Fix-memory-leak-while-parsing.patch new file mode 100644 index 0000000000..d8c21d88f7 --- /dev/null +++ b/meta/recipes-bsp/grub/files/0028-syslinux-Fix-memory-leak-while-parsing.patch @@ -0,0 +1,43 @@ +From ea12feb69b6af93c7e2fa03df7ac3bd1f4edd599 Mon Sep 17 00:00:00 2001 +From: Darren Kenny +Date: Thu, 26 Nov 2020 15:31:53 +0000 +Subject: [PATCH] syslinux: Fix memory leak while parsing + +In syslinux_parse_real() the 2 points where return is being called +didn't release the memory stored in buf which is no longer required. + +Fixes: CID 176634 + +Signed-off-by: Darren Kenny +Reviewed-by: Daniel Kiper + +Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=95bc016dba94cab3d398dd74160665915cd08ad6] +Signed-off-by: Marta Rybczynska +--- + grub-core/lib/syslinux_parse.c | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +diff --git a/grub-core/lib/syslinux_parse.c b/grub-core/lib/syslinux_parse.c +index 4afa992..3acc6b4 100644 +--- a/grub-core/lib/syslinux_parse.c ++++ b/grub-core/lib/syslinux_parse.c +@@ -737,7 +737,10 @@ syslinux_parse_real (struct syslinux_menu *menu) + && grub_strncasecmp ("help", ptr3, ptr4 - ptr3) == 0)) + { + if (helptext (ptr5, file, menu)) +- return 1; ++ { ++ grub_free (buf); ++ return 1; ++ } + continue; + } + +@@ -757,6 +760,7 @@ syslinux_parse_real (struct syslinux_menu *menu) + } + fail: + grub_file_close (file); ++ grub_free (buf); + return err; + } + diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc index ef409bdd6a..c965f0fd15 100644 --- a/meta/recipes-bsp/grub/grub2.inc +++ b/meta/recipes-bsp/grub/grub2.inc @@ -74,6 +74,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \ file://0025-affs-Fix-memory-leaks.patch \ file://0026-libgcrypt-mpi-Fix-possible-unintended-sign-extension.patch \ file://0027-libgcrypt-mpi-Fix-possible-NULL-dereference.patch \ + file://0028-syslinux-Fix-memory-leak-while-parsing.patch \ " SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934" SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea" -- cgit v1.2.3-54-g00ecf