Add a fix for gnulib's regexec NULL pointer dereference. This patch 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> --- ...egexec-Fix-possible-null-dereference.patch | 53 +++++++++++++++++++ meta/recipes-bsp/grub/grub2.inc | 1 + 2 files changed, 54 insertions(+) create mode 100644 meta/recipes-bsp/grub/files/0011-gnulib-regexec-Fix-possible-null-dereference.patch diff --git a/meta/recipes-bsp/grub/files/0011-gnulib-regexec-Fix-possible-null-dereference.patch b/meta/recipes-bsp/grub/files/0011-gnulib-regexec-Fix-possible-null-dereference.patch new file mode 100644 index 0000000000..4f43fcf7d5 --- /dev/null +++ b/meta/recipes-bsp/grub/files/0011-gnulib-regexec-Fix-possible-null-dereference.patch @@ -0,0 +1,53 @@ +From 244dc2b1f518635069a556c424b2e7627f0cf036 Mon Sep 17 00:00:00 2001 +From: Darren Kenny <darren.ke...@oracle.com> +Date: Thu, 5 Nov 2020 10:57:14 +0000 +Subject: [PATCH] gnulib/regexec: Fix possible null-dereference + +It appears to be possible that the mctx->state_log field may be NULL, +and the name of this function, clean_state_log_if_needed(), suggests +that it should be checking that it is valid to be cleaned before +assuming that it does. + +Fixes: CID 86720 + +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=0b7f347638153e403ee2dd518af3ce26f4f99647] +Signed-off-by: Marta Rybczynska <marta.rybczyn...@huawei.com> +--- + conf/Makefile.extra-dist | 1 + + .../lib/gnulib-patches/fix-regexec-null-deref.patch | 12 ++++++++++++ + 2 files changed, 13 insertions(+) + create mode 100644 grub-core/lib/gnulib-patches/fix-regexec-null-deref.patch + +diff --git a/conf/Makefile.extra-dist b/conf/Makefile.extra-dist +index 96d7e69..d27d3a9 100644 +--- a/conf/Makefile.extra-dist ++++ b/conf/Makefile.extra-dist +@@ -30,6 +30,7 @@ EXTRA_DIST += grub-core/genemuinitheader.sh + + EXTRA_DIST += grub-core/lib/gnulib-patches/fix-null-deref.patch + EXTRA_DIST += grub-core/lib/gnulib-patches/fix-null-state-deref.patch ++EXTRA_DIST += grub-core/lib/gnulib-patches/fix-regexec-null-deref.patch + EXTRA_DIST += grub-core/lib/gnulib-patches/fix-uninit-structure.patch + EXTRA_DIST += grub-core/lib/gnulib-patches/fix-unused-value.patch + EXTRA_DIST += grub-core/lib/gnulib-patches/fix-width.patch +diff --git a/grub-core/lib/gnulib-patches/fix-regexec-null-deref.patch b/grub-core/lib/gnulib-patches/fix-regexec-null-deref.patch +new file mode 100644 +index 0000000..db6dac9 +--- /dev/null ++++ b/grub-core/lib/gnulib-patches/fix-regexec-null-deref.patch +@@ -0,0 +1,12 @@ ++--- a/lib/regexec.c 2020-10-21 14:25:35.310195912 +0000 +++++ b/lib/regexec.c 2020-11-05 10:55:09.621542984 +0000 ++@@ -1692,6 +1692,9 @@ ++ { ++ Idx top = mctx->state_log_top; ++ +++ if (mctx->state_log == NULL) +++ return REG_NOERROR; +++ ++ if ((next_state_log_idx >= mctx->input.bufs_len ++ && mctx->input.bufs_len < mctx->input.len) ++ || (next_state_log_idx >= mctx->input.valid_len diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc index 94873475c1..e7168e75ea 100644 --- a/meta/recipes-bsp/grub/grub2.inc +++ b/meta/recipes-bsp/grub/grub2.inc @@ -57,6 +57,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \ file://0008-gnulib-regexec-Resolve-unused-variable.patch \ file://0009-gnulib-regcomp-Fix-uninitialized-token-structure.patch \ file://0010-gnulib-argp-help-Fix-dereference-of-a-possibly-NULL-.patch \ + file://0011-gnulib-regexec-Fix-possible-null-dereference.patch \ " SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934" SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea" -- 2.33.0
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