From 423432072d163acf0089bf2821d98404539d7d4c Mon Sep 17 00:00:00 2001 From: kernel test robot Date: Mon, 8 Mar 2021 15:09:51 +0800 Subject: USB: gadget: f_fs: fix memdup_user.cocci warnings drivers/usb/gadget/function/f_fs.c:3829:8-15: WARNING opportunity for memdup_user Use memdup_user rather than duplicating its implementation This is a little bit restricted to reduce false positives Generated by: scripts/coccinelle/api/memdup_user.cocci Fixes: 8704fd73bf56 ("USB: gadget: f_fs: remove likely/unlikely") Reported-by: kernel test robot Signed-off-by: kernel test robot Link: https://lore.kernel.org/r/20210308070951.GA83949@8a16bdd473dc Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/f_fs.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'drivers/usb/gadget') diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index 10a5d9f0f2b9..bf109191659a 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -3827,14 +3827,9 @@ static char *ffs_prepare_buffer(const char __user *buf, size_t len) if (!len) return NULL; - data = kmalloc(len, GFP_KERNEL); - if (!data) - return ERR_PTR(-ENOMEM); - - if (copy_from_user(data, buf, len)) { - kfree(data); - return ERR_PTR(-EFAULT); - } + data = memdup_user(buf, len); + if (IS_ERR(data)) + return ERR_PTR(PTR_ERR(data)); pr_vdebug("Buffer from user space:\n"); ffs_dump_mem("", data, len); -- cgit v1.2.3