From 35b73ceb9a7d10c81bd9e79e8485f7079ef2b40e Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas <bjorn.helgaas@hp.com> Date: Fri, 17 Feb 2006 13:59:50 -0800 Subject: [PATCH] [PATCH] ACPI: fix vendor resource length computation acpi_rs_get_list_length() needs to account for all the vendor-defined data bytes. Failing to include these causes buffers to be sized too small, which causes slab corruption when we later convert AML to resources and run off the end of the buffer. This causes slab corruption on machines that use ACPI vendor-defined resources. All HP ia64 machines do, and I'm told that some NEC machines may as well. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> --- drivers/acpi/resources/rscalc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c index 7d6481d9fbecd..4038dbfa63a0c 100644 --- a/drivers/acpi/resources/rscalc.c +++ b/drivers/acpi/resources/rscalc.c @@ -391,8 +391,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, * Ensure a 32-bit boundary for the structure */ extra_struct_bytes = - ACPI_ROUND_UP_to_32_bITS(resource_length) - - resource_length; + ACPI_ROUND_UP_to_32_bITS(resource_length); break; case ACPI_RESOURCE_NAME_END_TAG: @@ -408,8 +407,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, * Add vendor data and ensure a 32-bit boundary for the structure */ extra_struct_bytes = - ACPI_ROUND_UP_to_32_bITS(resource_length) - - resource_length; + ACPI_ROUND_UP_to_32_bITS(resource_length); break; case ACPI_RESOURCE_NAME_ADDRESS32: -- GitLab