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authorJulia Lawall <julia@diku.dk>2010-06-04 16:11:17 -0700
committerDavid S. Miller <davem@davemloft.net>2010-08-09 03:17:53 -0700
commit7d543d8468348c44010c7b4e6fdd23a398779668 (patch)
tree8d38259d1d2d4a6a8fca966f4c134e75e50b3df1 /drivers/ide
parent2a800b7bd926c739c07c1690579f03bbd6f1b5a3 (diff)
downloadop-kernel-dev-7d543d8468348c44010c7b4e6fdd23a398779668.zip
op-kernel-dev-7d543d8468348c44010c7b4e6fdd23a398779668.tar.gz
drivers/ide: 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> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/ide-taskfile.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 67fb735..34b9872 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -480,13 +480,9 @@ int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
u16 nsect = 0;
char __user *buf = (char __user *)arg;
- req_task = kzalloc(tasksize, GFP_KERNEL);
- if (req_task == NULL)
- return -ENOMEM;
- if (copy_from_user(req_task, buf, tasksize)) {
- kfree(req_task);
- return -EFAULT;
- }
+ req_task = memdup_user(buf, tasksize);
+ if (IS_ERR(req_task))
+ return PTR_ERR(req_task);
taskout = req_task->out_size;
taskin = req_task->in_size;
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