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authorJulia Lawall <julia@diku.dk>2010-05-26 23:42:12 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-27 18:12:41 +0200
commitb81d67a50c0f3021d170466388bec3e7fc3abe75 (patch)
treec9b974f52d7aef6e401f2ffe0b9b724c1b14e891 /drivers
parentdrivers/char/vt.c: use memdup_user (diff)
downloadlinux-b81d67a50c0f3021d170466388bec3e7fc3abe75.tar.xz
linux-b81d67a50c0f3021d170466388bec3e7fc3abe75.zip
drivers/message/i2o/i2o_config.c: 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/message/i2o/i2o_config.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index d33693c13368..c4b117f5fb70 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -186,14 +186,9 @@ static int i2o_cfg_parms(unsigned long arg, unsigned int type)
if (!dev)
return -ENXIO;
- ops = kmalloc(kcmd.oplen, GFP_KERNEL);
- if (!ops)
- return -ENOMEM;
-
- if (copy_from_user(ops, kcmd.opbuf, kcmd.oplen)) {
- kfree(ops);
- return -EFAULT;
- }
+ ops = memdup_user(kcmd.opbuf, kcmd.oplen);
+ if (IS_ERR(ops))
+ return PTR_ERR(ops);
/*
* It's possible to have a _very_ large table