From: Kan Liang kan.liang@linux.intel.com
[ Upstream commit d4ba0b06306a70c99a43f9d452886a86e2d3bd26 ]
The error handling path of iio mapping looks fragile. We already fixed one issue caused by it, commit f797f05d917f ("perf/x86/intel/uncore: Fix for iio mapping on Skylake Server"). Clean up the error handling path and make the code robust.
Reported-by: gushengxian gushengxian@yulong.com Signed-off-by: Kan Liang kan.liang@linux.intel.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lkml.kernel.org/r/40e66cf9-398b-20d7-ce4d-433be6e08921@linux.intel.c... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/events/intel/uncore_snbep.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index 16159950fcf5..9c936d06fb61 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -3752,11 +3752,11 @@ static int skx_iio_set_mapping(struct intel_uncore_type *type) /* One more for NULL. */ attrs = kcalloc((uncore_max_dies() + 1), sizeof(*attrs), GFP_KERNEL); if (!attrs) - goto err; + goto clear_topology;
eas = kcalloc(uncore_max_dies(), sizeof(*eas), GFP_KERNEL); if (!eas) - goto err; + goto clear_attrs;
for (die = 0; die < uncore_max_dies(); die++) { sprintf(buf, "die%ld", die); @@ -3777,7 +3777,9 @@ static int skx_iio_set_mapping(struct intel_uncore_type *type) for (; die >= 0; die--) kfree(eas[die].attr.attr.name); kfree(eas); +clear_attrs: kfree(attrs); +clear_topology: kfree(type->topology); clear_attr_update: type->attr_update = NULL;