diff options
| author | Peter Huewe <PeterHuewe@gmx.de> | 2013-10-30 01:40:28 +0100 |
|---|---|---|
| committer | Peter Huewe <peterhuewe@gmx.de> | 2014-01-06 14:37:23 +0100 |
| commit | 238b1eaa59e6a8e2993af0db9ec2255bfa53927b (patch) | |
| tree | b332688b47a875a7d3d82585db36f4540b7bc5b8 /drivers/char | |
| parent | 747d35bd9bb4ae6bd74b19baa5bbe32f3e0cee11 (diff) | |
tpm/tpm_ppi: Check return value of acpi_get_name
If
status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
fails for whatever reason and does not return AE_OK
if (strstr(buffer.pointer, context) != NULL) {
does dereference a null pointer.
-> Check the return value and return the status to the caller
Found by coverity
Cc: stable@vger.kernel.org
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_ppi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c index 18c5810b646..6ac9d275b73 100644 --- a/drivers/char/tpm/tpm_ppi.c +++ b/drivers/char/tpm/tpm_ppi.c @@ -30,6 +30,9 @@ static acpi_status ppi_callback(acpi_handle handle, u32 level, void *context, acpi_status status; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) + return status; + if (strstr(buffer.pointer, context) != NULL) { *return_value = handle; kfree(buffer.pointer); |