Commit 1f08ad02 authored by Dave Hansen's avatar Dave Hansen Committed by Linus Torvalds

[PATCH] undo do_readv_writev() behavior change

Bugme bug 4326: http://bugme.osdl.org/show_bug.cgi?id=4326 reports:

executing the systemcall readv with Bad argument
->len == -1) it gives out error EFAULT instead of EINVAL 
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 22a685d0
......@@ -467,10 +467,10 @@ static ssize_t do_readv_writev(int type, struct file *file,
void __user *buf = iov[seg].iov_base;
ssize_t len = (ssize_t)iov[seg].iov_len;
if (unlikely(!access_ok(vrfy_dir(type), buf, len)))
goto Efault;
if (len < 0) /* size_t not fitting an ssize_t .. */
goto out;
if (unlikely(!access_ok(vrfy_dir(type), buf, len)))
goto Efault;
tot_len += len;
if ((ssize_t)tot_len < 0) /* maths overflow on the ssize_t */
goto out;
......
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