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authorAxel Lin <axel.lin@gmail.com>2010-07-20 15:19:52 -0700
committerMatthew Garrett <mjg@redhat.com>2010-08-03 09:49:03 -0400
commit669048639ca6d3fdfb2e75dd77b8f49434d57625 (patch)
tree86a30799d2a76d1913b3ca9116bead864732cf49 /drivers/platform/x86/acer-wmi.c
parentf8ef3aecabe0e386303d028d02b6e5b23ac3a566 (diff)
acer-wmi: fix memory leaks in WMID_set_capabilities and get_wmid_devices
When acpi_evaluate_object() is passed ACPI_ALLOCATE_BUFFER, the caller must kfree the returned buffer if AE_OK is returned. The callers of wmi_query_block() pass ACPI_ALLOCATE_BUFFER, and thus must check its return value before accessing or kfree() on the buffer. This patch adds a missing kfree(out.pointer) before exit WMID_set_capabilities() and get_wmid_devices(). Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Carlos Corbacho <carlos@strangeworlds.co.uk> Cc: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'drivers/platform/x86/acer-wmi.c')
-rw-r--r--drivers/platform/x86/acer-wmi.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index dec558ee29e..652ca1800a0 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -772,6 +772,7 @@ static acpi_status WMID_set_capabilities(void)
obj->buffer.length == sizeof(u32)) {
devices = *((u32 *) obj->buffer.pointer);
} else {
+ kfree(out.pointer);
return AE_ERROR;
}
@@ -788,6 +789,7 @@ static acpi_status WMID_set_capabilities(void)
if (!(devices & 0x20))
max_brightness = 0x9;
+ kfree(out.pointer);
return status;
}
@@ -1094,6 +1096,7 @@ static u32 get_wmid_devices(void)
struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *obj;
acpi_status status;
+ u32 devices = 0;
status = wmi_query_block(WMID_GUID2, 1, &out);
if (ACPI_FAILURE(status))
@@ -1102,10 +1105,11 @@ static u32 get_wmid_devices(void)
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(u32)) {
- return *((u32 *) obj->buffer.pointer);
- } else {
- return 0;
+ devices = *((u32 *) obj->buffer.pointer);
}
+
+ kfree(out.pointer);
+ return devices;
}
/*