This is a note to let you know that I've just added the patch titled
staging: gigaset: fix illegal free on probe errors
to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From 84f60ca7b326ed8c08582417493982fe2573a9ad Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Mon, 2 Dec 2019 09:56:09 +0100
Subject: staging: gigaset: fix illegal free on probe errors
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@xxxxxxxxxxxxxxx> # 2.6.33
Cc: Tilman Schmidt <tilman@xxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20191202085610.12719-3-johan@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/isdn/gigaset/usb-gigaset.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/staging/isdn/gigaset/usb-gigaset.c b/drivers/staging/isdn/gigaset/usb-gigaset.c
index 5e393e7dde45..a84722d83bc6 100644
--- a/drivers/staging/isdn/gigaset/usb-gigaset.c
+++ b/drivers/staging/isdn/gigaset/usb-gigaset.c
@@ -571,8 +571,7 @@ 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;
@@ -584,9 +583,6 @@ 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);
--
2.24.0
