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authorLin Ming <ming.m.lin@intel.com>2008-09-27 11:28:46 +0800
committerLen Brown <len.brown@intel.com>2008-10-22 23:14:47 -0400
commitc35def2118d3d7cceb0f69d6707f613a7473df15 (patch)
treeeef4fcd1850ebd28dff173d89d4dd06efcbd8bec /drivers
parentbbbbeb8e31af97f11b84294b2e7e5607125829d2 (diff)
ACPICA: Fix fault after mem allocation failure in AML parser
Fixes a crash if a memory allocation fails during the Op completion routine acpi_ps_complete_this_op(). http://www.acpica.org/bugzilla/show_bug.cgi?id=492 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/parser/psparse.c28
1 files changed, 11 insertions, 17 deletions
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c
index 15e1702e48d..52caaf6582e 100644
--- a/drivers/acpi/parser/psparse.c
+++ b/drivers/acpi/parser/psparse.c
@@ -137,6 +137,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
union acpi_parse_object *next;
const struct acpi_opcode_info *parent_info;
union acpi_parse_object *replacement_op = NULL;
+ acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE_PTR(ps_complete_this_op, op);
@@ -186,7 +187,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
replacement_op =
acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
if (!replacement_op) {
- goto allocate_error;
+ status = AE_NO_MEMORY;
}
break;
@@ -211,7 +212,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
replacement_op =
acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
if (!replacement_op) {
- goto allocate_error;
+ status = AE_NO_MEMORY;
}
} else
if ((op->common.parent->common.aml_opcode ==
@@ -226,13 +227,13 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
acpi_ps_alloc_op(op->common.
aml_opcode);
if (!replacement_op) {
- goto allocate_error;
+ status = AE_NO_MEMORY;
+ } else {
+ replacement_op->named.data =
+ op->named.data;
+ replacement_op->named.length =
+ op->named.length;
}
-
- replacement_op->named.data =
- op->named.data;
- replacement_op->named.length =
- op->named.length;
}
}
break;
@@ -242,7 +243,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
replacement_op =
acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
if (!replacement_op) {
- goto allocate_error;
+ status = AE_NO_MEMORY;
}
}
@@ -302,14 +303,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
/* Now we can actually delete the subtree rooted at Op */
acpi_ps_delete_parse_tree(op);
- return_ACPI_STATUS(AE_OK);
-
- allocate_error:
-
- /* Always delete the subtree, even on error */
-
- acpi_ps_delete_parse_tree(op);
- return_ACPI_STATUS(AE_NO_MEMORY);
+ return_ACPI_STATUS(status);
}
/*******************************************************************************