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clk: fix an OF node reference leak in of_clk_get_parent_name()

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[ Upstream commit 28fa3291ca ]

Current implementation of of_clk_get_parent_name() leaks an OF node
reference on error path. Add a of_node_put() call before returning an
error.

This bug was found by an experimental static analysis tool that I am
developing.

Fixes: 8da411cc19 ("clk: let of_clk_get_parent_name() fail for invalid clock-indices")
Signed-off-by: Joe Hattori <joe@pf.is.s.u-tokyo.ac.jp>
Link: https://lore.kernel.org/r/20241210130913.3615205-1-joe@pf.is.s.u-tokyo.ac.jp
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Joe Hattori
2024-12-10 22:09:12 +09:00
committed by Greg Kroah-Hartman
parent 914ef7d1a7
commit 1ffbe3a0b8
1 changed files with 3 additions and 1 deletions
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drivers/clk/clk.c
+3 -1
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@@ -5343,8 +5343,10 @@ const char *of_clk_get_parent_name(const struct device_node *np, int index)
count++;
}
/* We went off the end of 'clock-indices' without finding it */
if (of_property_present(clkspec.np, "clock-indices") && !found)
if (of_property_present(clkspec.np, "clock-indices") && !found) {
of_node_put(clkspec.np);
return NULL;
}
if (of_property_read_string_index(clkspec.np, "clock-output-names",
index,