Commit 411b67b4 authored Sep 28, 2005 by Kostik Belousov Committed by Chris Wright Sep 29, 2005

[PATCH] readv/writev syscalls are not checked by lsm

it seems that readv(2)/writev(2) syscalls do not call
file_permission callback. Looks like this is overlook.

I have filled the issue into redhat bugzilla as
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169433


and got the recommendation to post this on lsm mailing list.

The following trivial patch solves the problem.

Signed-off-by: Kostik Belousov <kostikbel@gmail.com>
Signed-off-by: Chris Wright <chrisw@osdl.org>

parent aa55a086

fs/read_write.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -497,6 +497,9 @@ static ssize_t do_readv_writev(int type, struct file *file,
		}

		ret = rw_verify_area(type, file, pos, tot_len);
		if (ret)
		goto out;
		ret = security_file_permission(file, type == READ ? MAY_READ : MAY_WRITE);
		if (ret)
		goto out;