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grub2/0151-Initialized-initrd_ctx-so-we-don-t-free-a-random-poi.patch

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Various updates that came from rhel 7.1 work. - Clean up the build a bit to make it faster - Make grubenv work right on UEFI machines Related: rhbz#1119943 - Sort debug and rescue kernels later than normal ones Related: rhbz#1065360 - Allow "fallback" to include entries by title as well as number. Related: rhbz#1026084 - Fix a segfault on aarch64. - Load arm with SB enabled if available. - Add some serial port options to GRUB_MODULES. Signed-off-by: Peter Jones <pjones@redhat.com>
2014-09-29 15:48:01 +00:00
From 3cb3d2a07b11c95b3f8a908ae9d43eabef4dcf62 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Wed, 17 Sep 2014 15:13:14 -0500
Subject: [PATCH 151/152] Initialized initrd_ctx so we don't free a random
pointer from the stack.
Currently, if "linux" fails, the "goto fail;" in grub_cmd_initrd sends us
into grub_initrd_close() without grub_initrd_init() being called, and thus
it never clears initrd_ctx->components. grub_initrd_close() then frees that
address, which is stale data from the stack. If the stack happens to have a
stale *address* there that matches a recent allocation, then you'll get a
double free later.
So initialize the memory up front.
Signed-off-by: Peter Jones <pjones@redhat.com>
---
grub-core/loader/arm/linux.c | 2 +-
grub-core/loader/arm64/linux.c | 2 +-
grub-core/loader/i386/linux.c | 2 +-
grub-core/loader/i386/pc/linux.c | 2 +-
grub-core/loader/ia64/efi/linux.c | 2 +-
grub-core/loader/mips/linux.c | 2 +-
grub-core/loader/powerpc/ieee1275/linux.c | 2 +-
grub-core/loader/sparc64/ieee1275/linux.c | 2 +-
8 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/grub-core/loader/arm/linux.c b/grub-core/loader/arm/linux.c
index e6770d9..62cbe75 100644
--- a/grub-core/loader/arm/linux.c
+++ b/grub-core/loader/arm/linux.c
@@ -396,7 +396,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
{
grub_file_t file;
grub_size_t size = 0;
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
if (argc == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
diff --git a/grub-core/loader/arm64/linux.c b/grub-core/loader/arm64/linux.c
index f1d10a1..0dc144e 100644
--- a/grub-core/loader/arm64/linux.c
+++ b/grub-core/loader/arm64/linux.c
@@ -328,7 +328,7 @@ static grub_err_t
grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
int initrd_size, initrd_pages;
void *initrd_mem = NULL;
diff --git a/grub-core/loader/i386/linux.c b/grub-core/loader/i386/linux.c
index 31fb91e..2ae1763 100644
--- a/grub-core/loader/i386/linux.c
+++ b/grub-core/loader/i386/linux.c
@@ -1050,7 +1050,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
grub_addr_t addr_min, addr_max;
grub_addr_t addr;
grub_err_t err;
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
if (argc == 0)
{
diff --git a/grub-core/loader/i386/pc/linux.c b/grub-core/loader/i386/pc/linux.c
index 672c013..b481e46 100644
--- a/grub-core/loader/i386/pc/linux.c
+++ b/grub-core/loader/i386/pc/linux.c
@@ -388,7 +388,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
grub_uint8_t *initrd_chunk;
grub_addr_t initrd_addr;
grub_err_t err;
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
if (argc == 0)
{
diff --git a/grub-core/loader/ia64/efi/linux.c b/grub-core/loader/ia64/efi/linux.c
index 87ac49f..eb78e6e 100644
--- a/grub-core/loader/ia64/efi/linux.c
+++ b/grub-core/loader/ia64/efi/linux.c
@@ -568,7 +568,7 @@ static grub_err_t
grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
if (argc == 0)
{
diff --git a/grub-core/loader/mips/linux.c b/grub-core/loader/mips/linux.c
index ef64a5b..4a3e8c5 100644
--- a/grub-core/loader/mips/linux.c
+++ b/grub-core/loader/mips/linux.c
@@ -415,7 +415,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
void *initrd_src;
grub_addr_t initrd_dest;
grub_err_t err;
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
if (argc == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
diff --git a/grub-core/loader/powerpc/ieee1275/linux.c b/grub-core/loader/powerpc/ieee1275/linux.c
index 4a14f66..787d7dc 100644
--- a/grub-core/loader/powerpc/ieee1275/linux.c
+++ b/grub-core/loader/powerpc/ieee1275/linux.c
@@ -333,7 +333,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
grub_size_t size = 0;
grub_addr_t first_addr;
grub_addr_t addr;
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
if (argc == 0)
{
diff --git a/grub-core/loader/sparc64/ieee1275/linux.c b/grub-core/loader/sparc64/ieee1275/linux.c
index de6ee2f..c5e8dfa 100644
--- a/grub-core/loader/sparc64/ieee1275/linux.c
+++ b/grub-core/loader/sparc64/ieee1275/linux.c
@@ -373,7 +373,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
grub_addr_t paddr;
grub_addr_t addr;
int ret;
- struct grub_linux_initrd_context initrd_ctx;
+ struct grub_linux_initrd_context initrd_ctx = { 0, };
if (argc == 0)
{
--
1.9.3
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