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authorJulia Lawall <julia@diku.dk>2010-08-11 18:20:55 +0200
committerJean Delvare <khali@linux-fr.org>2010-08-11 18:20:55 +0200
commitf1c2e33c295de423db5740647bfaa5e2ad139192 (patch)
tree82d2d788d711d012a816dbab4d62fb5bcd2a8e87 /Documentation/i2c
parent35a56c5b821c1a5ab904018f322a8e45afd116f0 (diff)
i2c-dev: Use memdup_user
Use memdup_user when user data is immediately copied into the allocated region. Note that in the second case, the ++i is no longer necessary, as the last value is already freed if needed by the call to memdup_user. 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: Jean Delvare <khali@linux-fr.org>
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