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authorDan Carpenter <dan.carpenter@oracle.com>2012-07-24 12:52:04 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-08-10 12:54:27 -0700
commitdc6802a771e91050fb686dfeeb9de4c6c9cadb79 (patch)
tree1fa2d7ffa108e53a2433e816a8195aec7d6050f0 /drivers
parent4ac5d7050e4e4d63751e78fb152a274d05c08563 (diff)
downloadlinux-dc6802a771e91050fb686dfeeb9de4c6c9cadb79.tar.bz2
tty: handle NULL parameters in free_tty_struct()
We sometimes pass NULL pointers to free_tty_struct(). One example where it can happen is in the error handling code in pty_common_install(). Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/tty/tty_io.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 608749978df4..6784aae210e3 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -181,6 +181,8 @@ struct tty_struct *alloc_tty_struct(void)
void free_tty_struct(struct tty_struct *tty)
{
+ if (!tty)
+ return;
if (tty->dev)
put_device(tty->dev);
kfree(tty->write_buf);