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staging: comedi: check return code of put_user 

Function put_user may fail. Check for it.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vasiliy Kulikov 2010-09-05 22:32:33 +04:00 committed by Greg Kroah-Hartman
parent b04462a143
commit 81604d43ad
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/comedi/comedi_fops.c
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@ -537,7 +537,8 @@ static int do_chaninfo_ioctl(struct comedi_device *dev,
x = (dev->minor << 28) | (it.subdev << 24) | (i << 16) |
(s->range_table_list[i]->length);
put_user(x, it.rangelist + i);
if (put_user(x, it.rangelist + i))
return -EFAULT;
}
#if 0
if (copy_to_user(it.rangelist, s->range_type_list,