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authorDavid Miller <davem@davemloft.net>2015-12-17 16:05:49 -0500
committerDavid S. Miller <davem@davemloft.net>2015-12-18 16:03:03 -0500
commitd79f16c046086f4fe0d42184a458e187464eb83e (patch)
tree0707cd45b01d5e7a910676b93babc584548d53f9 /drivers/net/hamradio
parentacf673a3187edf72068ee2f92f4dc47d66baed47 (diff)
mkiss: Fix use after free in mkiss_close().
Need to do the unregister_device() after all references to the driver private have been done. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hamradio')
-rw-r--r--drivers/net/hamradio/mkiss.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 216bfd350169..0b72b9de5207 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -798,13 +798,13 @@ static void mkiss_close(struct tty_struct *tty)
if (!atomic_dec_and_test(&ax->refcnt))
down(&ax->dead_sem);
- unregister_netdev(ax->dev);
-
/* Free all AX25 frame buffers. */
kfree(ax->rbuff);
kfree(ax->xbuff);
ax->tty = NULL;
+
+ unregister_netdev(ax->dev);
}
/* Perform I/O control on an active ax25 channel. */