| From | Jiri Slaby <> | Subject | [PATCH 3.12 122/175] USB: serial: fix potential use-after-free after failed probe | Date | Tue, 17 Mar 2015 09:41:40 +0100 |
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From: Johan Hovold <johan@kernel.org>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit 07fdfc5e9f1c966be8722e8fa927e5ea140df5ce upstream.
Fix return value in probe error path, which could end up returning success (0) on errors. This could in turn lead to use-after-free or double free (e.g. in port_remove) when the port device is removed.
Fixes: c706ebdfc895 ("USB: usb-serial: call port_probe and port_remove at the right times") Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <greg@kroah.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- drivers/usb/serial/bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c index 74fc63b2e7fc..95ee3e734209 100644 --- a/drivers/usb/serial/bus.c +++ b/drivers/usb/serial/bus.c @@ -75,7 +75,7 @@ static int usb_serial_device_probe(struct device *dev) retval = device_create_file(dev, &dev_attr_port_number); if (retval) { if (driver->port_remove) - retval = driver->port_remove(port); + driver->port_remove(port); goto exit_with_autopm; } -- 2.3.0
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