From 162f921f22ad8bc804e3c5de1b1e8e8433e35e2d Mon Sep 17 00:00:00 2001 Message-Id: <162f921f22ad8bc804e3c5de1b1e8e8433e35e2d.1164352294.git.len.brown@intel.com> In-Reply-To: <410c2f0190f74c35505beda6ff3f2da7819f8bac.1164352285.git.len.brown@intel.com> References: <410c2f0190f74c35505beda6ff3f2da7819f8bac.1164352285.git.len.brown@intel.com> From: Robert Moore Date: Tue, 14 Nov 2006 20:10:02 +0300 Subject: [PATCH 56/65] ACPICA: Fixes for parameter validation. Reply-To: Len Brown Organization: Intel Open Source Technology Center Extra checks for valid handle/path combinations, BZ 478 Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/namespace/nsxfname.c | 45 +++++++++++++++++++----------------- 1 files changed, 24 insertions(+), 21 deletions(-) diff --git a/drivers/acpi/namespace/nsxfname.c b/drivers/acpi/namespace/nsxfname.c index 978213a..408bd11 100644 --- a/drivers/acpi/namespace/nsxfname.c +++ b/drivers/acpi/namespace/nsxfname.c @@ -84,38 +84,41 @@ acpi_get_handle(acpi_handle parent, /* Convert a parent handle to a prefix node */ if (parent) { - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return (status); - } - prefix_node = acpi_ns_map_handle_to_node(parent); if (!prefix_node) { - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return (AE_BAD_PARAMETER); } + } + + /* + * Valid cases are: + * 1) Fully qualified pathname + * 2) Parent + Relative pathname + * + * Error for + */ + if (acpi_ns_valid_root_prefix(pathname[0])) { - status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return (status); + /* Pathname is fully qualified (starts with '\') */ + + /* Special case for root-only, since we can't search for it */ + + if (!ACPI_STRCMP(pathname, ACPI_NS_ROOT_PATH)) { + *ret_handle = + acpi_ns_convert_entry_to_handle(acpi_gbl_root_node); + return (AE_OK); } - } + } else if (!prefix_node) { - /* Special case for root, since we can't search for it */ + /* Relative path with null prefix is disallowed */ - if (ACPI_STRCMP(pathname, ACPI_NS_ROOT_PATH) == 0) { - *ret_handle = - acpi_ns_convert_entry_to_handle(acpi_gbl_root_node); - return (AE_OK); + return (AE_BAD_PARAMETER); } - /* - * Find the Node and convert to a handle - */ - status = acpi_ns_get_node(prefix_node, pathname, ACPI_NS_NO_UPSEARCH, - &node); + /* Find the Node and convert to a handle */ - *ret_handle = NULL; + status = + acpi_ns_get_node(prefix_node, pathname, ACPI_NS_NO_UPSEARCH, &node); if (ACPI_SUCCESS(status)) { *ret_handle = acpi_ns_convert_entry_to_handle(node); } -- 1.4.4.1