From 7ec24db8dd7eb7e59316552bda92d950e31999d1 Mon Sep 17 00:00:00 2001 From: Thomas Meyer Date: Sat, 13 Aug 2011 10:48:57 +0200 Subject: [PATCH] staging: spectra: Use memdup_user Use kmemdup_user rather than duplicating its implementation This is a little bit restricted to reduce false positives The semantic patch that makes this output is available in scripts/coccinelle/api/memdup_user.cocci. More information about semantic patching is available at http://coccinelle.lip6.fr/ Signed-off-by: Thomas Meyer Signed-off-by: Greg Kroah-Hartman --- drivers/staging/spectra/ffsport.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/staging/spectra/ffsport.c b/drivers/staging/spectra/ffsport.c index 506547b603e1..86d556d6cf98 100644 --- a/drivers/staging/spectra/ffsport.c +++ b/drivers/staging/spectra/ffsport.c @@ -227,19 +227,12 @@ static int ioctl_write_page_data(unsigned long arg) if (copy_from_user(&info, (void __user *)arg, sizeof(info))) return -EFAULT; - buf = kmalloc(IdentifyDeviceData.PageDataSize, GFP_ATOMIC); - if (!buf) { - printk(KERN_ERR "ioctl_write_page_data: " - "failed to allocate memory\n"); - return -ENOMEM; - } - - if (copy_from_user(buf, (void __user *)info.data, - IdentifyDeviceData.PageDataSize)) { + buf = memdup_user((void __user *)info.data, + IdentifyDeviceData.PageDataSize); + if (IS_ERR(buf)) { printk(KERN_ERR "ioctl_write_page_data: " "failed to copy user data\n"); - kfree(buf); - return -EFAULT; + return PTR_ERR(buf); } mutex_lock(&spectra_lock); -- 2.30.2