diff options
| author | Ilkka Koskinen <ilkka.koskinen@linux.intel.com> | 2014-12-09 12:34:03 -0800 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2014-12-21 21:27:25 +0800 |
| commit | 7b09406390e76df97c9f5f29c23a4f56d982f22c (patch) | |
| tree | 722e857992e1459ace48e01f2046a7f1c8685ce9 /drivers/thermal/int340x_thermal/acpi_thermal_rel.c | |
| parent | 97bf6af1f928216fd6c5a66e8a57bfa95a659672 (diff) | |
Thermal/int340x: Handle properly the case when _trt or _art acpi entry is missing
If either of the entries was missing, the driver tried to free memory
using uninitialized pointer. In addition, it was dereferencing null
pointer.
Signed-off-by: Ilkka Koskinen <ilkka.koskinen@linux.intel.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/int340x_thermal/acpi_thermal_rel.c')
| -rw-r--r-- | drivers/thermal/int340x_thermal/acpi_thermal_rel.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/thermal/int340x_thermal/acpi_thermal_rel.c b/drivers/thermal/int340x_thermal/acpi_thermal_rel.c index e4e61b3fb11e..231cabc16e16 100644 --- a/drivers/thermal/int340x_thermal/acpi_thermal_rel.c +++ b/drivers/thermal/int340x_thermal/acpi_thermal_rel.c @@ -82,7 +82,7 @@ int acpi_parse_trt(acpi_handle handle, int *trt_count, struct trt **trtp, struct acpi_buffer trt_format = { sizeof("RRNNNNNN"), "RRNNNNNN" }; if (!acpi_has_method(handle, "_TRT")) - return 0; + return -ENODEV; status = acpi_evaluate_object(handle, "_TRT", NULL, &buffer); if (ACPI_FAILURE(status)) @@ -167,7 +167,7 @@ int acpi_parse_art(acpi_handle handle, int *art_count, struct art **artp, sizeof("RRNNNNNNNNNNN"), "RRNNNNNNNNNNN" }; if (!acpi_has_method(handle, "_ART")) - return 0; + return -ENODEV; status = acpi_evaluate_object(handle, "_ART", NULL, &buffer); if (ACPI_FAILURE(status)) @@ -321,8 +321,8 @@ static long acpi_thermal_rel_ioctl(struct file *f, unsigned int cmd, unsigned long length = 0; int count = 0; char __user *arg = (void __user *)__arg; - struct trt *trts; - struct art *arts; + struct trt *trts = NULL; + struct art *arts = NULL; switch (cmd) { case ACPI_THERMAL_GET_TRT_COUNT: |