diff options
| author | Bartosz Szczepanek <bsz@semihalf.com> | 2020-07-08 15:46:13 +0200 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2020-07-14 22:46:44 +0800 |
| commit | 3ce315a704b4568616d1b14166cff3430ef07d12 (patch) | |
| tree | cddedab9447086d97122e399055ad3be831104e9 /drivers/thermal | |
| parent | 9ebcfadb0610322ac537dd7aa5d9cbc2b2894c68 (diff) | |
thermal/int340x_thermal: Prevent page fault on .set_mode() op
Starting from commit "thermal/int340x_thermal: Don't require IDSP to
exist", priv->current_uuid_index is initialized to -1. This value may
be passed to int3400_thermal_run_osc() from int3400_thermal_set_mode,
contributing to page fault when accessing int3400_thermal_uuids array
at index -1.
This commit adds a check on uuid value to int3400_thermal_run_osc.
Fixes: 8d485da0ddee ("thermal/int340x_thermal: Don't require IDSP to exist")
Signed-off-by: Bartosz Szczepanek <bsz@semihalf.com>
Reviewed-by: Pandruvada, Srinivas <srinivas.pandruvada@linux.intel.com>
[ rzhang: Add Fixes tag ]
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20200708134613.131555-1-bsz@semihalf.com
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/intel/int340x_thermal/int3400_thermal.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c index 0b3a62655843..12448ccd27f1 100644 --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c @@ -216,11 +216,16 @@ static int int3400_thermal_run_osc(acpi_handle handle, acpi_status status; int result = 0; struct acpi_osc_context context = { - .uuid_str = int3400_thermal_uuids[uuid], + .uuid_str = NULL, .rev = 1, .cap.length = 8, }; + if (uuid < 0 || uuid >= INT3400_THERMAL_MAXIMUM_UUID) + return -EINVAL; + + context.uuid_str = int3400_thermal_uuids[uuid]; + buf[OSC_QUERY_DWORD] = 0; buf[OSC_SUPPORT_DWORD] = enable; |