[patch] usb: gadget: f_fs: check for allocation failure

[Dan Carpenter]

Return -ENOMEM if kmalloc() fails.

Fixes: 9353afbbfa7b ('usb: gadget: f_fs: buffer data from ‘oversized’ OUT 
requests')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/usb/gadget/function/f_fs.c 
b/drivers/usb/gadget/function/f_fs.c
index a91fcb0..5c8429f 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -775,6 +775,8 @@ static ssize_t __ffs_epfile_read_data(struct ffs_epfile 
*epfile,
 
        data_len -= ret;
        buf = kmalloc(sizeof(*buf) + data_len, GFP_KERNEL);
+       if (!buf)
+               return -ENOMEM;
        buf->length = data_len;
        buf->data = buf->storage;
        memcpy(buf->storage, data + ret, data_len);
--
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