From: Johan Hovold <johan@kernel.org> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: devel@driverdev.osuosl.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, stable <stable@vger.kernel.org>, Johan Hovold <johan@kernel.org>, Tilman Schmidt <tilman@imap.cc> Subject: [PATCH v2 2/3] staging: gigaset: fix illegal free on probe errors Date: Mon, 2 Dec 2019 09:56:09 +0100 Message-ID: <20191202085610.12719-3-johan@kernel.org> (raw) In-Reply-To: <20191202085610.12719-1-johan@kernel.org> 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> --- 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 _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
next prev parent reply index Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-12-02 8:56 [PATCH v2 0/3] staging: gigaset: fix crashes on probe Johan Hovold 2019-12-02 8:56 ` [PATCH v2 1/3] staging: gigaset: fix general protection fault " Johan Hovold 2019-12-02 8:56 ` Johan Hovold [this message] 2019-12-02 8:56 ` [PATCH v2 3/3] staging: gigaset: add endpoint-type sanity check Johan Hovold
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