Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.17 130/343] powerpc/secvar: fix refcount leak in format_show() | Date | Tue, 12 Apr 2022 08:29:08 +0200 |
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From: Hangyu Hua <hbh25y@gmail.com>
[ 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> --- 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; -- 2.35.1
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