From: Hangyu Hua hbh25y@gmail.com
stable inclusion from stable-v5.10.111 commit 02222bf4f0a27f6eba66d1f597cdb5daadd51829 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5GL1Z
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit d601fd24e6964967f115f036a840f4f28488f63f ]
Refcount leak will happen when format_show returns failure in multiple cases. Unified management of of_node_put can fix this problem.
Signed-off-by: Hangyu Hua hbh25y@gmail.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20220302021959.10959-1-hbh25y@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- arch/powerpc/kernel/secvar-sysfs.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secvar-sysfs.c index a0a78aba2083..1ee4640a2641 100644 --- a/arch/powerpc/kernel/secvar-sysfs.c +++ b/arch/powerpc/kernel/secvar-sysfs.c @@ -26,15 +26,18 @@ static ssize_t format_show(struct kobject *kobj, struct kobj_attribute *attr, const char *format;
node = of_find_compatible_node(NULL, NULL, "ibm,secvar-backend"); - if (!of_device_is_available(node)) - return -ENODEV; + if (!of_device_is_available(node)) { + rc = -ENODEV; + goto out; + }
rc = of_property_read_string(node, "format", &format); if (rc) - return rc; + goto out;
rc = sprintf(buf, "%s\n", format);
+out: of_node_put(node);
return rc;