Hi Dan, > -----Original Message----- > From: Dan Carpenter [mailto:dan.carpenter@xxxxxxxxxx] > Sent: Wednesday 21 August 2019 08:07 > To: Derek Kiernan <dkiernan@xxxxxxxxxx>; Dragan Cvetic <draganc@xxxxxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx>; Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>; Michal Simek <michals@xxxxxxxxxx>; > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; kernel-janitors@xxxxxxxxxxxxxxx > Subject: [PATCH 2/4] misc: xilinx_sdfec: Return -EFAULT if copy_from_user() fails > > The copy_from_user() funciton returns the number of bytes remaining to > be copied but we want to return -EFAULT to the user. > > Fixes: 20ec628e8007 ("misc: xilinx_sdfec: Add ability to configure LDPC") > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> > --- > drivers/misc/xilinx_sdfec.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c > index dc1b8b412712..813b82c59360 100644 > --- a/drivers/misc/xilinx_sdfec.c > +++ b/drivers/misc/xilinx_sdfec.c > @@ -651,9 +651,10 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg) > if (!ldpc) > return -ENOMEM; > > - ret = copy_from_user(ldpc, arg, sizeof(*ldpc)); > - if (ret) > + if (copy_from_user(ldpc, arg, sizeof(*ldpc))) { > + ret = -EFAULT; > goto err_out; > + } > > if (xsdfec->config.code == XSDFEC_TURBO_CODE) { > ret = -EIO; > -- > 2.20.1 Reviewed-by: Dragan Cvetic <dragan.cvetic@xxxxxxxxxx> Thanks, Dragan
