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| author |   Marta Rybczynska <rybczynska@gmail.com> | 2022-02-18 11:05:12 +0100 |
|---|---|---|
| committer |   Steve Sakoman <steve@sakoman.com> | 2022-02-23 05:00:41 -1000 |
| commit | 8e537ef16bc1ef4bc807cc165d3b7eb1301578de (patch) | |
| tree | a39eb75402eccd027421c33acc36babec7d3a4aa | |
| parent | 17a06ced4ed9305e0a4064bdaad49e653c18284b (diff) | |
| download | openembedded-core-contrib-8e537ef16bc1ef4bc807cc165d3b7eb1301578de.tar.gz | |
grub: fix wrong handling of argc == 0
This change fixes wrong handling of argc == 0 causing a memory leak.
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.rybczynska@huawei.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
| -rw-r--r-- | meta/recipes-bsp/grub/files/0004-kern-parser-Fix-resource-leak-if-argc-0.patch | 50 | ||||
| -rw-r--r-- | meta/recipes-bsp/grub/grub2.inc | 1 |
2 files changed, 51 insertions, 0 deletions
diff --git a/meta/recipes-bsp/grub/files/0004-kern-parser-Fix-resource-leak-if-argc-0.patch b/meta/recipes-bsp/grub/files/0004-kern-parser-Fix-resource-leak-if-argc-0.patch new file mode 100644 index 0000000000..933416605c --- /dev/null +++ b/meta/recipes-bsp/grub/files/0004-kern-parser-Fix-resource-leak-if-argc-0.patch @@ -0,0 +1,50 @@ +From 8861fa6226f7229105722ba669465e879b56ee2b Mon Sep 17 00:00:00 2001 +From: Darren Kenny <darren.kenny@oracle.com> +Date: Fri, 22 Jan 2021 12:32:41 +0000 +Subject: [PATCH] kern/parser: Fix resource leak if argc == 0 + +After processing the command-line yet arriving at the point where we are +setting argv, we are allocating memory, even if argc == 0, which makes +no sense since we never put anything into the allocated argv. + +The solution is to simply return that we've successfully processed the +arguments but that argc == 0, and also ensure that argv is NULL when +we're not allocating anything in it. + +There are only 2 callers of this function, and both are handling a zero +value in argc assuming nothing is allocated in argv. + +Fixes: CID 96680 + +Signed-off-by: Darren Kenny <darren.kenny@oracle.com> +Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> + +Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=d06161b035dde4769199ad65aa0a587a5920012b] +Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com> +--- + grub-core/kern/parser.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/grub-core/kern/parser.c b/grub-core/kern/parser.c +index 619db31..d1cf061 100644 +--- a/grub-core/kern/parser.c ++++ b/grub-core/kern/parser.c +@@ -146,6 +146,7 @@ grub_parser_split_cmdline (const char *cmdline, + int i; + + *argc = 0; ++ *argv = NULL; + do + { + if (!rd || !*rd) +@@ -207,6 +208,10 @@ grub_parser_split_cmdline (const char *cmdline, + (*argc)++; + } + ++ /* If there are no args, then we're done. */ ++ if (!*argc) ++ return 0; ++ + /* Reserve memory for the return values. */ + args = grub_malloc (bp - buffer); + if (!args) diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc index 678aa5c4e2..2e4e6d7ac2 100644 --- a/meta/recipes-bsp/grub/grub2.inc +++ b/meta/recipes-bsp/grub/grub2.inc @@ -50,6 +50,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \ file://0001-mmap-Fix-memory-leak-when-iterating-over-mapped-memo.patch \ file://0002-net-net-Fix-possible-dereference-to-of-a-NULL-pointe.patch \ file://0003-net-tftp-Fix-dangling-memory-pointer.patch \ + file://0004-kern-parser-Fix-resource-leak-if-argc-0.patch \ " SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934" SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea" |