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drm/amd/pm: Handle non-terminated overdrive commands.

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The incoming strings might not be terminated by a newline
or a 0.

(found while testing a program that just wrote the string
 itself, causing a crash)

Cc: stable@vger.kernel.org
Fixes: e3933f26b657 ("drm/amd/pp: Add edit/commit/show OD clock/voltage support in sysfs")
Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bas Nieuwenhuizen 2023-10-17 16:01:35 +02:00 committed by Alex Deucher
parent 9248462d7e
commit 08e9ebc75b
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/amd/pm/amdgpu_pm.c
View File

@ -761,7 +761,7 @@ static ssize_t amdgpu_set_pp_od_clk_voltage(struct device *dev,
if (adev->in_suspend && !adev->in_runpm)
return -EPERM;
if (count > 127)
if (count > 127 || count == 0)
return -EINVAL;
if (*buf == 's')
@ -781,7 +781,8 @@ static ssize_t amdgpu_set_pp_od_clk_voltage(struct device *dev,
else
return -EINVAL;
memcpy(buf_cpy, buf, count+1);
memcpy(buf_cpy, buf, count);
buf_cpy[count] = 0;
tmp_str = buf_cpy;
@ -798,6 +799,9 @@ static ssize_t amdgpu_set_pp_od_clk_voltage(struct device *dev,
return -EINVAL;
parameter_size++;
if (!tmp_str)
break;
while (isspace(*tmp_str))
tmp_str++;
}