From: Liang He <windhl@126.com> To: timur@kernel.org, gregkh@linuxfoundation.org, jirislaby@kernel.org Cc: windhl@126.com, linuxppc-dev@lists.ozlabs.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] tty: serial: Fix refcount leak bug in ucc_uart.c Date: Sat, 18 Jun 2022 14:08:50 +0800 [thread overview] Message-ID: <20220618060850.4058525-1-windhl@126.com> (raw) 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. Signed-off-by: Liang He <windhl@126.com> --- drivers/tty/serial/ucc_uart.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 6000853973c1..3cc9ef08455c 100644 --- 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; -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Liang He <windhl@126.com> To: timur@kernel.org, gregkh@linuxfoundation.org, jirislaby@kernel.org Cc: linuxppc-dev@lists.ozlabs.org, windhl@126.com, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH] tty: serial: Fix refcount leak bug in ucc_uart.c Date: Sat, 18 Jun 2022 14:08:50 +0800 [thread overview] Message-ID: <20220618060850.4058525-1-windhl@126.com> (raw) 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. Signed-off-by: Liang He <windhl@126.com> --- drivers/tty/serial/ucc_uart.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 6000853973c1..3cc9ef08455c 100644 --- 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; -- 2.25.1
next reply other threads:[~2022-06-18 6:10 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-06-18 6:08 Liang He [this message] 2022-06-18 6:08 ` [PATCH] tty: serial: Fix refcount leak bug in ucc_uart.c Liang He 2022-06-18 17:07 ` Timur Tabi 2022-06-18 17:07 ` Timur Tabi
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