From: "Gustavo A. R. Silva" <gustavo@embeddedor.com> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>, "Gustavo A. R. Silva" <gustavo@embeddedor.com> Subject: [PATCH] usb: iowarrior: replace kmalloc with kmalloc_array Date: Thu, 23 Aug 2018 12:31:25 -0500 [thread overview] Message-ID: <20180823173125.GA24762@embeddedor.com> (raw) A common flaw in the kernel is integer overflow during memory allocation size calculations. In an effort to reduce the frequency of these bugs, kmalloc_array was implemented, which allocates memory for an array, while at the same time detects integer overflow. This patch replaces cases of: kmalloc(a * b, gfp) with: kmalloc_array(a * b, gfp) Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- drivers/usb/misc/iowarrior.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c index c2991b8..7a22400 100644 --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -808,7 +808,7 @@ static int iowarrior_probe(struct usb_interface *interface, dev->int_in_endpoint->bInterval); /* create an internal buffer for interrupt data from the device */ dev->read_queue = - kmalloc(((dev->report_size + 1) * MAX_INTERRUPT_BUFFER), + kmalloc_array(dev->report_size + 1, MAX_INTERRUPT_BUFFER, GFP_KERNEL); if (!dev->read_queue) goto error; -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>, "Gustavo A. R. Silva" <gustavo@embeddedor.com> Subject: usb: iowarrior: replace kmalloc with kmalloc_array Date: Thu, 23 Aug 2018 12:31:25 -0500 [thread overview] Message-ID: <20180823173125.GA24762@embeddedor.com> (raw) A common flaw in the kernel is integer overflow during memory allocation size calculations. In an effort to reduce the frequency of these bugs, kmalloc_array was implemented, which allocates memory for an array, while at the same time detects integer overflow. This patch replaces cases of: kmalloc(a * b, gfp) with: kmalloc_array(a * b, gfp) Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- drivers/usb/misc/iowarrior.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c index c2991b8..7a22400 100644 --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -808,7 +808,7 @@ static int iowarrior_probe(struct usb_interface *interface, dev->int_in_endpoint->bInterval); /* create an internal buffer for interrupt data from the device */ dev->read_queue = - kmalloc(((dev->report_size + 1) * MAX_INTERRUPT_BUFFER), + kmalloc_array(dev->report_size + 1, MAX_INTERRUPT_BUFFER, GFP_KERNEL); if (!dev->read_queue) goto error;
next reply other threads:[~2018-08-23 17:54 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-08-23 17:31 Gustavo A. R. Silva [this message] 2018-08-23 17:31 ` usb: iowarrior: replace kmalloc with kmalloc_array Gustavo A. R. Silva 2018-08-23 17:42 ` [PATCH] " Gustavo A. R. Silva 2018-08-23 17:42 ` Gustavo A. R. Silva 2018-08-23 17:43 ` [PATCH] " Kees Cook 2018-08-23 17:51 ` Gustavo A. R. Silva 2018-08-23 17:51 ` Gustavo A. R. Silva
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