From: Gavin Shan gshan@redhat.com
[ Upstream commit c377e67c6271954969384f9be1b1b71de13eba30 ]
The CPU mask (@tmp) should be released on failing to allocate @cpu_groups or any of its elements. Otherwise, it leads to memory leakage because the CPU mask variable is dynamically allocated when CONFIG_CPUMASK_OFFSTACK is enabled.
Signed-off-by: Gavin Shan gshan@redhat.com Reviewed-by: Sudeep Holla sudeep.holla@arm.com Link: https://lore.kernel.org/r/20200630075227.199624-1-gshan@redhat.com Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/firmware/psci_checker.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/psci_checker.c b/drivers/firmware/psci_checker.c index cbd53cb1b2d47..9f1a913933d53 100644 --- a/drivers/firmware/psci_checker.c +++ b/drivers/firmware/psci_checker.c @@ -164,8 +164,10 @@ static int alloc_init_cpu_groups(cpumask_var_t **pcpu_groups)
cpu_groups = kcalloc(nb_available_cpus, sizeof(cpu_groups), GFP_KERNEL); - if (!cpu_groups) + if (!cpu_groups) { + free_cpumask_var(tmp); return -ENOMEM; + }
cpumask_copy(tmp, cpu_online_mask);
@@ -174,6 +176,7 @@ static int alloc_init_cpu_groups(cpumask_var_t **pcpu_groups) topology_core_cpumask(cpumask_any(tmp));
if (!alloc_cpumask_var(&cpu_groups[num_groups], GFP_KERNEL)) { + free_cpumask_var(tmp); free_cpu_groups(num_groups, &cpu_groups); return -ENOMEM; }