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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Chris Coulson <chris.coulson@canonical.com>
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Date: Tue, 3 May 2022 09:47:35 +0200
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Subject: [PATCH] loader/i386/efi/linux: Fix a memory leak in the initrd
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command
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Subsequent invocations of the initrd command result in the previous
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initrd being leaked, so fix that.
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Signed-off-by: Chris Coulson <chris.coulson@canonical.com>
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(cherry picked from commit d98af31ce1e31bb22163960d53f5eb28c66582a0)
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(cherry picked from commit 62234d6a00e6d1dd8e017ff161d359feb5234082)
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---
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grub-core/loader/i386/efi/linux.c | 21 ++++++++++++---------
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1 file changed, 12 insertions(+), 9 deletions(-)
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diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
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index 9e25e51ccf..d24553a79d 100644
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--- a/grub-core/loader/i386/efi/linux.c
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+++ b/grub-core/loader/i386/efi/linux.c
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@@ -210,6 +210,7 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
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grub_uint8_t *ptr;
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struct grub_linuxefi_context *context = (struct grub_linuxefi_context *) cmd->data;
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struct linux_kernel_params *params;
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+ void *initrd_mem = 0;
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if (argc == 0)
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{
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@@ -242,19 +243,19 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
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}
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}
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- context->initrd_mem = kernel_alloc(size, N_("can't allocate initrd"));
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- if (context->initrd_mem == NULL)
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+ initrd_mem = kernel_alloc(size, N_("can't allocate initrd"));
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+ if (initrd_mem == NULL)
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goto fail;
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- grub_dprintf ("linux", "initrd_mem = %p\n", context->initrd_mem);
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+ grub_dprintf ("linux", "initrd_mem = %p\n", initrd_mem);
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params->ramdisk_size = LOW_U32(size);
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- params->ramdisk_image = LOW_U32(context->initrd_mem);
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+ params->ramdisk_image = LOW_U32(initrd_mem);
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#if defined(__x86_64__)
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params->ext_ramdisk_size = HIGH_U32(size);
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- params->ext_ramdisk_image = HIGH_U32(context->initrd_mem);
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+ params->ext_ramdisk_image = HIGH_U32(initrd_mem);
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#endif
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- ptr = context->initrd_mem;
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+ ptr = initrd_mem;
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for (i = 0; i < nfiles; i++)
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{
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@@ -271,6 +272,9 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
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ptr += ALIGN_UP_OVERHEAD (cursize, 4);
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}
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+ kernel_free(context->initrd_mem, params->ramdisk_size);
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+
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+ context->initrd_mem = initrd_mem;
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params->ramdisk_size = size;
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fail:
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@@ -278,9 +282,8 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
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grub_file_close (files[i]);
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grub_free (files);
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- if (context->initrd_mem && grub_errno)
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- grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)context->initrd_mem,
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- BYTES_TO_PAGES(size));
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+ if (initrd_mem && grub_errno)
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+ kernel_free (initrd_mem, size);
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return grub_errno;
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}
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