From fad92b11047a748c996ebd6cfb164a63814eeb2e Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Tue, 25 May 2021 21:44:04 +0200
Subject: [PATCH] tty: serial: 8250: serial_cs: Fix a memory leak in error handling path
Git-commit: fad92b11047a748c996ebd6cfb164a63814eeb2e
Patch-mainline: v5.14-rc1
References: git-fixes
In the probe function, if the final 'serial_config()' fails, 'info' is
leaking.
Add a resource handling path to free this memory.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/dc25f96b7faebf42e60fe8d02963c941cf4d8124.1621971720.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/tty/serial/8250/serial_cs.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/8250/serial_cs.c b/drivers/tty/serial/8250/serial_cs.c
index 63ea9c4da3d5..3708114343b0 100644
--- a/drivers/tty/serial/8250/serial_cs.c
+++ b/drivers/tty/serial/8250/serial_cs.c
@@ -306,6 +306,7 @@ static int serial_resume(struct pcmcia_device *link)
static int serial_probe(struct pcmcia_device *link)
{
struct serial_info *info;
+ int ret;
dev_dbg(&link->dev, "serial_attach()\n");
@@ -320,7 +321,15 @@ static int serial_probe(struct pcmcia_device *link)
if (do_sound)
link->config_flags |= CONF_ENABLE_SPKR;
- return serial_config(link);
+ ret = serial_config(link);
+ if (ret)
+ goto free_info;
+
+ return 0;
+
+free_info:
+ kfree(info);
+ return ret;
}
static void serial_detach(struct pcmcia_device *link)
--
2.26.2