From ac369a77967d5dd984a5430505eaf24a380af1c0 Mon Sep 17 00:00:00 2001 From: Nikita Belov Date: Wed, 29 Oct 2014 18:07:02 +0400 Subject: hw/i386/acpi-build.c: Fix memory leak in acpi_build_tables_cleanup() There are three ACPI tables: 'linker_data', 'rsdp' and 'table_data'. They are used differently. Two of them are being copied before using and only the copy is used later. But the third is used directly. Because of that we need to free two tables completely and delete only wrapper for the third one. Valgrind output: ==23931== 131,072 bytes in 1 blocks are definitely lost in loss record 7,729 of 7,734 ==23931== at 0x4C2CE8E: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==23931== by 0x2EA920: realloc_and_trace (vl.c:2811) ==23931== by 0x509E6AE: g_realloc (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0) ==23931== by 0x506DB32: ??? (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0) ==23931== by 0x506E463: g_array_set_size (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0) ==23931== by 0x256A4F: acpi_align_size (acpi-build.c:487) ==23931== by 0x259F92: acpi_build (acpi-build.c:1601) ==23931== by 0x25A212: acpi_setup (acpi-build.c:1682) ==23931== by 0x24F346: pc_guest_info_machine_done (pc.c:1110) ==23931== by 0x55FAAB: notifier_list_notify (notify.c:39) ==23931== by 0x2EA704: qemu_run_machine_init_done_notifiers (vl.c:2759) ==23931== by 0x2EEC3C: main (vl.c:4504) Signed-off-by: Nikita Belov Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Acked-by: Christian Borntraeger --- hw/i386/acpi-build.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'hw/i386') diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 6bd2749..4003b6b 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -1502,11 +1502,9 @@ static inline void acpi_build_tables_init(AcpiBuildTables *tables) static inline void acpi_build_tables_cleanup(AcpiBuildTables *tables, bool mfre) { void *linker_data = bios_linker_loader_cleanup(tables->linker); - if (mfre) { - g_free(linker_data); - } + g_free(linker_data); g_array_free(tables->rsdp, mfre); - g_array_free(tables->table_data, mfre); + g_array_free(tables->table_data, true); g_array_free(tables->tcpalog, mfre); } -- cgit v1.1