[RFC][PATCH] Restore LSM hook calls to sendfile

[Stephen D. Smalley]

This patch restores the LSM hook calls in sendfile to 2.5.59.  The hook
was previously added as of 2.5.29 but the hook calls in sendfile were
subsequently lost as a result of the sendfile rewrite as of 2.5.30.

If anyone has any objections to this change, please let me know.

 read_write.c |    8 ++++++++
 1 files changed, 8 insertions(+)
-----

===== fs/read_write.c 1.25 vs edited =====
--- 1.25/fs/read_write.c	Sat Dec 14 18:19:55 2002
+++ edited/fs/read_write.c	Wed Jan 22 15:21:04 2003
@@ -531,6 +531,10 @@
 	if (retval)
 		goto fput_in;
 
+	retval = security_file_permission (in_file, MAY_READ);
+	if (retval)
+		goto fput_in;
+
 	/*
 	 * Get output file, and verify that it is ok..
 	 */
@@ -545,6 +549,10 @@
 		goto fput_out;
 	out_inode = out_file->f_dentry->d_inode;
 	retval = locks_verify_area(FLOCK_VERIFY_WRITE, out_inode, out_file, out_file->f_pos, count);
+	if (retval)
+		goto fput_out;
+
+	retval = security_file_permission (out_file, MAY_WRITE);
 	if (retval)
 		goto fput_out;
 

--
Stephen Smalley, NSA
[e-mail]