6.12-stable review patch. If anyone has any objections, please let me know.
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From: Dhananjay Ugwekar dhananjay.ugwekar@amd.com
commit 426db24d4db2e4f0d6720aeb7795eafcb9e82640 upstream.
Check if policy is NULL before dereferencing it in amd_pstate_update.
Fixes: e8f555daacd3 ("cpufreq/amd-pstate: fix setting policy current frequency value") Signed-off-by: Dhananjay Ugwekar dhananjay.ugwekar@amd.com Reviewed-by: Mario Limonciello mario.limonciello@amd.com Reviewed-by: Gautham R. Shenoy gautham.shenoy@amd.com Link: https://lore.kernel.org/r/20250205112523.201101-11-dhananjay.ugwekar@amd.com Signed-off-by: Mario Limonciello mario.limonciello@amd.com [Minor context change fixed.] Signed-off-by: Wenshan Lan jetlan9@163.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/cpufreq/amd-pstate.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -482,6 +482,9 @@ static void amd_pstate_update(struct amd u32 nominal_perf = READ_ONCE(cpudata->nominal_perf); u64 value = prev;
+ if (!policy) + return; + min_perf = clamp_t(unsigned long, min_perf, cpudata->min_limit_perf, cpudata->max_limit_perf); max_perf = clamp_t(unsigned long, max_perf, cpudata->min_limit_perf,