From 5a64096700dc9761b57e767c9f0b740eb2cb84dd Mon Sep 17 00:00:00 2001 From: "xinhui.pan" Date: Mon, 28 Jul 2014 16:14:52 +0800 Subject: [PATCH] tty/n_gsm.c: fix a memory leak in gsmld_open If gsmld_attach_gsm fails, the gsm is not used anymore. tty core will not call gsmld_close to do the cleanup work. tty core just restore to the tty old ldisc. That always causes memory leak. Signed-off-by: xinhui.pan Reported-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index d5f578fe3fa6..152443ab1447 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2366,6 +2366,7 @@ static void gsmld_close(struct tty_struct *tty) static int gsmld_open(struct tty_struct *tty) { struct gsm_mux *gsm; + int ret; if (tty->ops->write == NULL) return -EINVAL; @@ -2380,7 +2381,13 @@ static int gsmld_open(struct tty_struct *tty) /* Attach the initial passive connection */ gsm->encoding = 1; - return gsmld_attach_gsm(tty, gsm); + + ret = gsmld_attach_gsm(tty, gsm); + if (ret != 0) { + gsm_cleanup_mux(gsm); + mux_put(gsm); + } + return ret; } /** -- 2.20.1