On 08/12/16 11:37, SF Markus Elfring wrote:
From: Markus Elfring <elfr...@users.sourceforge.net> Date: Thu, 8 Dec 2016 11:15:40 +0100The functions "kcalloc" and "kzalloc" were called in four cases by the function "usbduxsigma_alloc_usb_buffers" without checking immediately if they succeded. This issue was detected by using the Coccinelle software. Allocated memory was also not released if one of these function calls failed. * Reduce memory allocation sizes for two function calls. * Split a condition check for memory allocation failures. * Add more exception handling. Fixes: 65989c030bbca96be45ed137f6384dbd46030d10 ("staging: comedi: usbduxsigma: factor usb buffer allocation out of (*probe)") Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net> --- drivers/staging/comedi/drivers/usbduxsigma.c | 61 ++++++++++++++++++++++------ 1 file changed, 49 insertions(+), 12 deletions(-)
My comments on PATCH 2/5 about how comedi drivers handle clean-up apply to this patch too. So this patch will cause an Oops in the unlikely event of running out of memory during buffer allocation.
-- -=( Ian Abbott @ MEV Ltd. E-mail: <abbo...@mev.co.uk> )=- -=( Web: http://www.mev.co.uk/ )=-
