diff options
| author | Julia Lawall <julia@diku.dk> | 2010-08-10 18:01:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-11 08:59:02 -0700 |
| commit | 3094141c6532a4f748425c21c091001f218da8ae (patch) | |
| tree | 20428f86de4fb7d6f8a57a4e9c35a6f2f2c02d37 /drivers | |
| parent | a737b88df8d0b4476ae53daaa6db137df0541203 (diff) | |
| download | linux-3094141c6532a4f748425c21c091001f218da8ae.tar.bz2 | |
drivers/scsi: use memdup_user
Use memdup_user when user data is immediately copied into the
allocated region.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@
- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+ to = memdup_user(from,size);
if (
- to==NULL
+ IS_ERR(to)
|| ...) {
<+... when != goto l1;
- -ENOMEM
+ PTR_ERR(to)
...+>
}
- if (copy_from_user(to, from, size) != 0) {
- <+... when != goto l2;
- -EFAULT
- ...+>
- }
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/sg.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 2968c6b83ddb..78d616315d8e 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1686,14 +1686,9 @@ static int sg_start_req(Sg_request *srp, unsigned char *cmd) int len, size = sizeof(struct sg_iovec) * iov_count; struct iovec *iov; - iov = kmalloc(size, GFP_ATOMIC); - if (!iov) - return -ENOMEM; - - if (copy_from_user(iov, hp->dxferp, size)) { - kfree(iov); - return -EFAULT; - } + iov = memdup_user(hp->dxferp, size); + if (IS_ERR(iov)) + return PTR_ERR(iov); len = iov_length(iov, iov_count); if (hp->dxfer_len < len) { |