diff options
| author | Johan Hovold <johan@kernel.org> | 2019-12-02 09:56:09 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-21 10:41:49 +0100 |
| commit | 6ac38d527c072469057559ed153c58d8686418c5 (patch) | |
| tree | 3e3d955a917409e536e36f463bb1e306e9888c55 /drivers/isdn/gigaset | |
| parent | 82acad8e13e8a66005651f610510e5701437f40b (diff) | |
staging: gigaset: fix illegal free on probe errors
commit 84f60ca7b326ed8c08582417493982fe2573a9ad upstream.
The driver failed to initialise its receive-buffer pointer, something
which could lead to an illegal free on late probe errors.
Fix this by making sure to clear all driver data at allocation.
Fixes: 2032e2c2309d ("usb_gigaset: code cleanup")
Cc: stable <stable@vger.kernel.org> # 2.6.33
Cc: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191202085610.12719-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/isdn/gigaset')
| -rw-r--r-- | drivers/isdn/gigaset/usb-gigaset.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c index 20591f6d5364..42e825d87029 100644 --- a/drivers/isdn/gigaset/usb-gigaset.c +++ b/drivers/isdn/gigaset/usb-gigaset.c @@ -574,8 +574,7 @@ static int gigaset_initcshw(struct cardstate *cs) { struct usb_cardstate *ucs; - cs->hw.usb = ucs = - kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL); + cs->hw.usb = ucs = kzalloc(sizeof(struct usb_cardstate), GFP_KERNEL); if (!ucs) { pr_err("out of memory\n"); return -ENOMEM; @@ -587,9 +586,6 @@ static int gigaset_initcshw(struct cardstate *cs) ucs->bchars[3] = 0; ucs->bchars[4] = 0x11; ucs->bchars[5] = 0x13; - ucs->bulk_out_buffer = NULL; - ucs->bulk_out_urb = NULL; - ucs->read_urb = NULL; tasklet_init(&cs->write_tasklet, gigaset_modem_fill, (unsigned long) cs); |