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grub2/SOURCES/0512-loader-i386-efi-linux-...

78 lines
2.7 KiB

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Chris Coulson <chris.coulson@canonical.com>
Date: Tue, 3 May 2022 09:47:35 +0200
Subject: [PATCH] loader/i386/efi/linux: Fix a memory leak in the initrd
command
Subsequent invocations of the initrd command result in the previous
initrd being leaked, so fix that.
Signed-off-by: Chris Coulson <chris.coulson@canonical.com>
(cherry picked from commit d98af31ce1e31bb22163960d53f5eb28c66582a0)
(cherry picked from commit 62234d6a00e6d1dd8e017ff161d359feb5234082)
(cherry picked from commit bda5a10716dc9676400dce1374232452f46d0bc4)
---
grub-core/loader/i386/efi/linux.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
index 77a0734786..8337191921 100644
--- a/grub-core/loader/i386/efi/linux.c
+++ b/grub-core/loader/i386/efi/linux.c
@@ -209,6 +209,7 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
grub_uint8_t *ptr;
struct grub_linuxefi_context *context = (struct grub_linuxefi_context *) cmd->data;
struct linux_kernel_params *params;
+ void *initrd_mem = 0;
if (argc == 0)
{
@@ -242,19 +243,19 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
}
}
- context->initrd_mem = kernel_alloc(size, N_("can't allocate initrd"));
- if (context->initrd_mem == NULL)
+ initrd_mem = kernel_alloc(size, N_("can't allocate initrd"));
+ if (initrd_mem == NULL)
goto fail;
- grub_dprintf ("linux", "initrd_mem = %p\n", context->initrd_mem);
+ grub_dprintf ("linux", "initrd_mem = %p\n", initrd_mem);
params->ramdisk_size = LOW_U32(size);
- params->ramdisk_image = LOW_U32(context->initrd_mem);
+ params->ramdisk_image = LOW_U32(initrd_mem);
#if defined(__x86_64__)
params->ext_ramdisk_size = HIGH_U32(size);
- params->ext_ramdisk_image = HIGH_U32(context->initrd_mem);
+ params->ext_ramdisk_image = HIGH_U32(initrd_mem);
#endif
- ptr = context->initrd_mem;
+ ptr = initrd_mem;
for (i = 0; i < nfiles; i++)
{
@@ -273,6 +274,9 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
ptr += ALIGN_UP_OVERHEAD (cursize, 4);
}
+ kernel_free(context->initrd_mem, params->ramdisk_size);
+
+ context->initrd_mem = initrd_mem;
params->ramdisk_size = size;
fail:
@@ -280,9 +284,8 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
grub_file_close (files[i]);
grub_free (files);
- if (context->initrd_mem && grub_errno)
- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)context->initrd_mem,
- BYTES_TO_PAGES(size));
+ if (initrd_mem && grub_errno)
+ kernel_free (initrd_mem, size);
return grub_errno;
}