grub2/SOURCES/0293-multiboot2-Fix-memory-leak-if-grub_create_loader_cmd.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Fri, 26 Jun 2020 10:51:43 -0400
Subject: [PATCH] multiboot2: Fix memory leak if grub_create_loader_cmdline()
 fails

Fixes: CID 292468

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Upstream-commit-id: cd6760b6289
---
 grub-core/loader/multiboot_mbi2.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/grub-core/loader/multiboot_mbi2.c b/grub-core/loader/multiboot_mbi2.c
index 54078455e2f..872dcd42e97 100644
--- a/grub-core/loader/multiboot_mbi2.c
+++ b/grub-core/loader/multiboot_mbi2.c
@@ -1089,6 +1089,7 @@ grub_multiboot2_add_module (grub_addr_t start, grub_size_t size,
 {
   struct module *newmod;
   grub_size_t len = 0;
+  grub_err_t err = 0;
 
   newmod = grub_malloc (sizeof (*newmod));
   if (!newmod)
@@ -1107,8 +1108,14 @@ grub_multiboot2_add_module (grub_addr_t start, grub_size_t size,
   newmod->cmdline_size = len;
   total_modcmd += ALIGN_UP (len, MULTIBOOT_TAG_ALIGN);
 
-  grub_create_loader_cmdline (argc, argv, newmod->cmdline,
-			      newmod->cmdline_size);
+  err = grub_create_loader_cmdline (argc, argv, newmod->cmdline,
+				    newmod->cmdline_size);
+  if (err)
+    {
+      grub_free (newmod->cmdline);
+      grub_free (newmod);
+      return err;
+    }
 
   if (modules_last)
     modules_last->next = newmod;