6.6-stable review patch. If anyone has any objections, please let me know.
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From: Bas Nieuwenhuizen bas@basnieuwenhuizen.nl
commit 08e9ebc75b5bcfec9d226f9e16bab2ab7b25a39a upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/pm/amdgpu_pm.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -734,7 +734,7 @@ static ssize_t amdgpu_set_pp_od_clk_volt if (adev->in_suspend && !adev->in_runpm) return -EPERM;
- if (count > 127) + if (count > 127 || count == 0) return -EINVAL;
if (*buf == 's') @@ -754,7 +754,8 @@ static ssize_t amdgpu_set_pp_od_clk_volt else return -EINVAL;
- memcpy(buf_cpy, buf, count+1); + memcpy(buf_cpy, buf, count); + buf_cpy[count] = 0;
tmp_str = buf_cpy;
@@ -771,6 +772,9 @@ static ssize_t amdgpu_set_pp_od_clk_volt return -EINVAL; parameter_size++;
+ if (!tmp_str) + break; + while (isspace(*tmp_str)) tmp_str++; }