diff options
| author | kernel test robot <lkp@intel.com> | 2021-03-08 15:09:51 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-23 15:24:26 +0100 |
| commit | 423432072d163acf0089bf2821d98404539d7d4c (patch) | |
| tree | ca9d3369e1778049e186c05dd01de5733e953136 /drivers/usb/gadget | |
| parent | f2b6ebf61e8fcd0b1f03a084d39742b1f6113ac4 (diff) | |
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 <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20210308070951.GA83949@8a16bdd473dc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/function/f_fs.c | 11 |
1 files changed, 3 insertions, 8 deletions
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); |