Commit 0635170b authored Jul 12, 2006 by Adam B. Jerome Committed by Linus Torvalds Jul 12, 2006

[PATCH] /fs/proc/: 'larger than buffer size' memory accessed by clear_user()



Address a potential 'larger than buffer size' memory access by
clear_user().  Without this patch, this call to clear_user() can attempt to
clear too many (tsz) bytes resulting in a wrong (-EFAULT) return code by
read_kcore().

Signed-off-by: Adam B. Jerome <abj@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 232ba9db

fs/proc/kcore.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -382,7 +382,7 @@ read_kcore(struct file file, char __user buffer, size_t buflen, loff_t *fpos)
		*/
		if (n) {
		if (clear_user(buffer + tsz - n,
		tsz - n))
		n))
		return -EFAULT;
		}
		} else {