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106 lines
4.2 KiB
106 lines
4.2 KiB
2 months ago
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From e1f2265b5f6bf5b63bf3808bb540888f3cf8badb Mon Sep 17 00:00:00 2001
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From: Bernhard Beschow <shentey@gmail.com>
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Date: Wed, 8 May 2024 19:55:05 +0200
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Subject: [PATCH 041/100] hw/i386/x86: Don't leak "pc.bios" memory region
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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RH-MergeRequest: 245: SEV-SNP support
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RH-Jira: RHEL-39544
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Bandan Das <bdas@redhat.com>
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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RH-Commit: [41/91] a9cd61d8d240134c09c46e244efb89217cadf60c (bonzini/rhel-qemu-kvm)
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Fix the leaking in x86_bios_rom_init() by adding a "bios" attribute to
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X86MachineState. Note that it is only used in the -bios case.
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Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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Signed-off-by: Bernhard Beschow <shentey@gmail.com>
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Message-ID: <20240508175507.22270-5-shentey@gmail.com>
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Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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(cherry picked from commit 865d95321ffc8d9941e33000b10140550f094556)
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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hw/i386/x86.c | 13 ++++++-------
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include/hw/i386/x86.h | 6 ++++++
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2 files changed, 12 insertions(+), 7 deletions(-)
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diff --git a/hw/i386/x86.c b/hw/i386/x86.c
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index 457e8a34a5..29167de97d 100644
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--- a/hw/i386/x86.c
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+++ b/hw/i386/x86.c
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@@ -1133,7 +1133,6 @@ void x86_bios_rom_init(X86MachineState *x86ms, const char *default_firmware,
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{
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const char *bios_name;
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char *filename;
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- MemoryRegion *bios;
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int bios_size, isa_bios_size;
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ssize_t ret;
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@@ -1149,8 +1148,8 @@ void x86_bios_rom_init(X86MachineState *x86ms, const char *default_firmware,
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(bios_size % 65536) != 0) {
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goto bios_error;
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}
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- bios = g_malloc(sizeof(*bios));
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- memory_region_init_ram(bios, NULL, "pc.bios", bios_size, &error_fatal);
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+ memory_region_init_ram(&x86ms->bios, NULL, "pc.bios", bios_size,
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+ &error_fatal);
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if (sev_enabled()) {
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/*
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* The concept of a "reset" simply doesn't exist for
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@@ -1159,11 +1158,11 @@ void x86_bios_rom_init(X86MachineState *x86ms, const char *default_firmware,
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* the firmware as rom to properly re-initialize on reset.
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* Just go for a straight file load instead.
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*/
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- void *ptr = memory_region_get_ram_ptr(bios);
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+ void *ptr = memory_region_get_ram_ptr(&x86ms->bios);
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load_image_size(filename, ptr, bios_size);
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x86_firmware_configure(ptr, bios_size);
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} else {
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- memory_region_set_readonly(bios, !isapc_ram_fw);
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+ memory_region_set_readonly(&x86ms->bios, !isapc_ram_fw);
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ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
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if (ret != 0) {
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goto bios_error;
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@@ -1173,7 +1172,7 @@ void x86_bios_rom_init(X86MachineState *x86ms, const char *default_firmware,
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/* map the last 128KB of the BIOS in ISA space */
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isa_bios_size = MIN(bios_size, 128 * KiB);
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- memory_region_init_alias(&x86ms->isa_bios, NULL, "isa-bios", bios,
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+ memory_region_init_alias(&x86ms->isa_bios, NULL, "isa-bios", &x86ms->bios,
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bios_size - isa_bios_size, isa_bios_size);
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memory_region_add_subregion_overlap(rom_memory,
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0x100000 - isa_bios_size,
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@@ -1184,7 +1183,7 @@ void x86_bios_rom_init(X86MachineState *x86ms, const char *default_firmware,
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/* map all the bios at the top of memory */
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memory_region_add_subregion(rom_memory,
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(uint32_t)(-bios_size),
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- bios);
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+ &x86ms->bios);
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return;
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bios_error:
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diff --git a/include/hw/i386/x86.h b/include/hw/i386/x86.h
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index a07de79167..55c6809ae0 100644
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--- a/include/hw/i386/x86.h
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+++ b/include/hw/i386/x86.h
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@@ -53,6 +53,12 @@ struct X86MachineState {
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GMappedFile *initrd_mapped_file;
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HotplugHandler *acpi_dev;
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+ /*
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+ * Map the whole BIOS just underneath the 4 GiB address boundary. Only used
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+ * in the ROM (-bios) case.
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+ */
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+ MemoryRegion bios;
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+
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/*
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* Map the upper 128 KiB of the BIOS just underneath the 1 MiB address
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* boundary.
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--
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2.39.3
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