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author | Johan Hovold <jhovold@gmail.com> | 2011-03-22 11:12:10 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-27 11:30:48 -0700 |
commit | 84241926c6de00e379993d71d7790f3863aa3a71 (patch) | |
tree | b1bf69354b0218e83d9a33e50fdd2781ac847118 | |
parent | 442723286b56c69cffc717f1b53a5a6d32e7f042 (diff) |
USB: cdc-acm: fix potential null-pointer dereference
commit 15e5bee33ffc11d0e5c6f819a65e7881c5c407be upstream.
Must check return value of tty_port_tty_get.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r-- | drivers/usb/class/cdc-acm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index cda15ef632c5..7512dfdb7e0f 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -534,6 +534,8 @@ static void acm_softint(struct work_struct *work) if (!ACM_READY(acm)) return; tty = tty_port_tty_get(&acm->port); + if (!tty) + return; tty_wakeup(tty); tty_kref_put(tty); } |