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| author | Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> | 2023-10-17 16:01:35 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-28 17:07:22 +0000 |
| commit | e973f40de16125f3f85a07db68a2ad4a0aeb42c2 (patch) | |
| tree | fd27ee5208bad80072fd8ee695554cd4e0ca861f | |
| parent | dc4542861ec8dde92c3c8a5139bc412860aebe60 (diff) | |
| download | linux-e973f40de16125f3f85a07db68a2ad4a0aeb42c2.tar.gz linux-e973f40de16125f3f85a07db68a2ad4a0aeb42c2.tar.bz2 linux-e973f40de16125f3f85a07db68a2ad4a0aeb42c2.zip | |
drm/amd/pm: Handle non-terminated overdrive commands.
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>
| -rw-r--r-- | drivers/gpu/drm/amd/pm/amdgpu_pm.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index 0e78437c8389..29f3d8431089 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -758,7 +758,7 @@ 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') @@ -778,7 +778,8 @@ 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; @@ -795,6 +796,9 @@ 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++; } |