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drm/amd/pm: fix null pointer access

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Writing a string without delimiters (' ', '\n', '\0') to the under
gpu_od/fan_ctrl sysfs or pp_power_profile_mode for the CUSTOM profile
will result in a null pointer dereference.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4401
Signed-off-by: Umio Yasuno <coelacanth_dream@protonmail.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Umio Yasuno 2025-07-15 14:44:35 +00:00 committed by Alex Deucher
parent 82a7c94fce
commit d524d40e3a
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/amd/pm/amdgpu_pm.c
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@ -1398,6 +1398,8 @@ static ssize_t amdgpu_set_pp_power_profile_mode(struct device *dev,
if (ret)
return -EINVAL;
parameter_size++;
if (!tmp_str)
break;
while (isspace(*tmp_str))
tmp_str++;
}
@ -3645,6 +3647,9 @@ static int parse_input_od_command_lines(const char *buf,
return -EINVAL;
parameter_size++;
if (!tmp_str)
break;
while (isspace(*tmp_str))
tmp_str++;
}