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thermal: check array index when set cur_state [1/1]

Browse Source 
PD#SWPL-8747

Problem:
android.security.sts.Poc17_11#testPocCVE_2017_6264
test echo /sys/devices/virtual/thermal/cooling_device2/cur_state
crash

Solution:
check array index

Verify:
verified by u212

Change-Id: I235d62508d95fffaed7b811ba008384db7c7ec6f
Signed-off-by: Wencai You <wencai.you@amlogic.com>
This commit is contained in:
Wencai You
2019-05-23 20:42:51 +08:00
committed by Luan Yuan
parent 4695eaa6f9
commit fd8e44e0b4
1 changed files with 3 additions and 1 deletions
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4
drivers/amlogic/thermal/gpu_cooling.c
View File

@@ -151,8 +151,10 @@ static int gpufreq_set_cur_state(struct thermal_cooling_device *cdev,
state, gpufreq_device->gpufreq_state);
/* if (gpufreq_device->gpufreq_state == state) */
/* return 0; */
gpufreq_device->gpufreq_state = state;
ret = gpufreq_get_max_state(cdev, &max_state);
if (state > max_state-1)
state = max_state-1;
gpufreq_device->gpufreq_state = state;
state = max_state-1-state;
pr_debug("state=%ld,gpufreq_device->gpufreq_state=%d\n",