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grub: fix memory leak at error in grub_efi_get_filename()

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This change fixes a memory leak on error in grub_efi_get_filename().
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: 1b192247fa913c29f5cdf22abe4e71a509b3861e)

Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Marta Rybczynska
2022-02-18 11:05:14 +01:00
committed by Richard Purdie
parent 763007dff1
commit 4a5a4dbcf6
2 changed files with 31 additions and 0 deletions
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30
meta/recipes-bsp/grub/files/0006-kern-efi-Fix-memory-leak-on-failure.patch Normal file
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@@ -0,0 +1,30 @@
From d4fd0243920b71cc6e03cc0cadf23b4fe03c352f Mon Sep 17 00:00:00 2001
From: Darren Kenny <darren.kenny@oracle.com>
Date: Thu, 5 Nov 2020 10:15:25 +0000
Subject: [PATCH] kern/efi: Fix memory leak on failure
Free the memory allocated to name before returning on failure.
Fixes: CID 296222
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=ed286ceba6015d37a9304f04602451c47bf195d7]
Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
---
grub-core/kern/efi/efi.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 6a38080..baeeef0 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -415,6 +415,7 @@ grub_efi_get_filename (grub_efi_device_path_t *dp0)
{
grub_error (GRUB_ERR_OUT_OF_RANGE,
"malformed EFI Device Path node has length=%d", len);
+ grub_free (name);
return NULL;
}

1
meta/recipes-bsp/grub/grub2.inc
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@@ -52,6 +52,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
file://0003-net-tftp-Fix-dangling-memory-pointer.patch \
file://0004-kern-parser-Fix-resource-leak-if-argc-0.patch \
file://0005-efi-Fix-some-malformed-device-path-arithmetic-errors.patch \
file://0006-kern-efi-Fix-memory-leak-on-failure.patch \
"
SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934"
SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea"