6.6-stable review patch. If anyone has any objections, please let me know.
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From: Shuhao Fu sfual@cse.ust.hk
[ Upstream commit 2de5cb96060a1664880d65b120e59485a73588a8 ]
In function `s5pv210_cpu_init`, a possible refcount inconsistency has been identified, causing a resource leak.
Why it is a bug: 1. For every clk_get, there should be a matching clk_put on every successive error handling path. 2. After calling `clk_get(dmc1_clk)`, variable `dmc1_clk` will not be freed even if any error happens.
How it is fixed: For every failed path, an extra goto label is added to ensure `dmc1_clk` will be freed regardlessly.
Signed-off-by: Shuhao Fu sfual@cse.ust.hk Signed-off-by: Viresh Kumar viresh.kumar@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/cpufreq/s5pv210-cpufreq.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index 76c888ed8d160..d2fa42beae9c2 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -518,7 +518,7 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy)
if (policy->cpu != 0) { ret = -EINVAL; - goto out_dmc1; + goto out; }
/* @@ -530,7 +530,7 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy) if ((mem_type != LPDDR) && (mem_type != LPDDR2)) { pr_err("CPUFreq doesn't support this memory type\n"); ret = -EINVAL; - goto out_dmc1; + goto out; }
/* Find current refresh counter and frequency each DMC */ @@ -544,6 +544,8 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy) cpufreq_generic_init(policy, s5pv210_freq_table, 40000); return 0;
+out: + clk_put(dmc1_clk); out_dmc1: clk_put(dmc0_clk); out_dmc0: