From: Marta Rybczynska <rybczyn...@gmail.com> This patch adds initialization of a structure in grub's zstd, which might be left uninitialized by the compiler. It is a part of a security series [1].
[1] https://lists.gnu.org/archive/html/grub-devel/2021-03/msg00007.html Signed-off-by: Marta Rybczynska <marta.rybczyn...@huawei.com> Signed-off-by: Steve Sakoman <st...@sakoman.com> --- ...std-Initialize-seq_t-structure-fully.patch | 34 +++++++++++++++++++ meta/recipes-bsp/grub/grub2.inc | 1 + 2 files changed, 35 insertions(+) create mode 100644 meta/recipes-bsp/grub/files/0014-zstd-Initialize-seq_t-structure-fully.patch diff --git a/meta/recipes-bsp/grub/files/0014-zstd-Initialize-seq_t-structure-fully.patch b/meta/recipes-bsp/grub/files/0014-zstd-Initialize-seq_t-structure-fully.patch new file mode 100644 index 0000000000..19d881c1ca --- /dev/null +++ b/meta/recipes-bsp/grub/files/0014-zstd-Initialize-seq_t-structure-fully.patch @@ -0,0 +1,34 @@ +From f55ffe6bd8b844a8cd9956702f42ac2eb96ad56f Mon Sep 17 00:00:00 2001 +From: Darren Kenny <darren.ke...@oracle.com> +Date: Thu, 5 Nov 2020 10:29:59 +0000 +Subject: [PATCH] zstd: Initialize seq_t structure fully + +While many compilers will initialize this to zero, not all will, so it +is better to be sure that fields not being explicitly set are at known +values, and there is code that checks this fields value elsewhere in the +code. + +Fixes: CID 292440 + +Signed-off-by: Darren Kenny <darren.ke...@oracle.com> +Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com> + +Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=2777cf4466719921dbe4b30af358a75e7d76f217] +Signed-off-by: Marta Rybczynska <marta.rybczyn...@huawei.com> +--- + grub-core/lib/zstd/zstd_decompress.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/grub-core/lib/zstd/zstd_decompress.c b/grub-core/lib/zstd/zstd_decompress.c +index 711b5b6..e4b5670 100644 +--- a/grub-core/lib/zstd/zstd_decompress.c ++++ b/grub-core/lib/zstd/zstd_decompress.c +@@ -1325,7 +1325,7 @@ typedef enum { ZSTD_lo_isRegularOffset, ZSTD_lo_isLongOffset=1 } ZSTD_longOffset + FORCE_INLINE_TEMPLATE seq_t + ZSTD_decodeSequence(seqState_t* seqState, const ZSTD_longOffset_e longOffsets) + { +- seq_t seq; ++ seq_t seq = {0}; + U32 const llBits = seqState->stateLL.table[seqState->stateLL.state].nbAdditionalBits; + U32 const mlBits = seqState->stateML.table[seqState->stateML.state].nbAdditionalBits; + U32 const ofBits = seqState->stateOffb.table[seqState->stateOffb.state].nbAdditionalBits; diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc index 1906a28f30..7cf4d64149 100644 --- a/meta/recipes-bsp/grub/grub2.inc +++ b/meta/recipes-bsp/grub/grub2.inc @@ -60,6 +60,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \ file://0011-gnulib-regexec-Fix-possible-null-dereference.patch \ file://0012-gnulib-regcomp-Fix-uninitialized-re_token.patch \ file://0013-io-lzopio-Resolve-unnecessary-self-assignment-errors.patch \ + file://0014-zstd-Initialize-seq_t-structure-fully.patch \ " SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934" SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea" -- 2.25.1
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