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tty: serial: Fix refcount leak bug in ucc_uart.c
author
Liang He
<windhl@126.com>
Sat, 18 Jun 2022 06:08:50 +0000
(14:08 +0800)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Thu, 25 Aug 2022 09:40:40 +0000
(11:40 +0200)
[ Upstream commit
d24d7bb2cd947676f9b71fb944d045e09b8b282f
]
In soc_info(), of_find_node_by_type() will return a node pointer
with refcount incremented. We should use of_node_put() when it is
not used anymore.
Acked-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Liang He <windhl@126.com>
Link:
https://lore.kernel.org/r/20220618060850.4058525-1-windhl@126.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/tty/serial/ucc_uart.c
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diff --git
a/drivers/tty/serial/ucc_uart.c
b/drivers/tty/serial/ucc_uart.c
index
6000853
..
3cc9ef0
100644
(file)
--- a/
drivers/tty/serial/ucc_uart.c
+++ b/
drivers/tty/serial/ucc_uart.c
@@
-1137,6
+1137,8
@@
static unsigned int soc_info(unsigned int *rev_h, unsigned int *rev_l)
/* No compatible property, so try the name. */
soc_string = np->name;
+ of_node_put(np);
+
/* Extract the SOC number from the "PowerPC," string */
if ((sscanf(soc_string, "PowerPC,%u", &soc) != 1) || !soc)
return 0;