Patch "afs: Need to clear responded flag in addr cursor" has been added to the 4.15-stable tree

Patch "afs: Need to clear responded flag in addr cursor" has been added to the 4.15-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    afs: Need to clear responded flag in addr cursor

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     afs-need-to-clear-responded-flag-in-addr-cursor.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 8305e579c653b127b292fcdce551e930f9560260 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Tue, 6 Feb 2018 06:26:30 +0000
Subject: afs: Need to clear responded flag in addr cursor

From: David Howells <dhowells@redhat.com>

commit 8305e579c653b127b292fcdce551e930f9560260 upstream.

In afs_select_fileserver(), we need to clear the ->responded flag in the
address list when reusing it.  We should also clear it in
afs_select_current_fileserver().

To this end, just memset() the object before initialising it.

Fixes: d2ddc776a458 ("afs: Overhaul volume and server record caching and fileserver rotation")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/afs/rotate.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/fs/afs/rotate.c
+++ b/fs/afs/rotate.c
@@ -383,6 +383,7 @@ use_server:
 	afs_get_addrlist(alist);
 	read_unlock(&server->fs_lock);
 
+	memset(&fc->ac, 0, sizeof(fc->ac));
 
 	/* Probe the current fileserver if we haven't done so yet. */
 	if (!test_bit(AFS_SERVER_FL_PROBED, &server->flags)) {
@@ -397,11 +398,8 @@ use_server:
 	else
 		afs_put_addrlist(alist);
 
-	fc->ac.addr  = NULL;
 	fc->ac.start = READ_ONCE(alist->index);
 	fc->ac.index = fc->ac.start;
-	fc->ac.error = 0;
-	fc->ac.begun = false;
 	goto iterate_address;
 
 iterate_address:
@@ -458,12 +456,10 @@ bool afs_select_current_fileserver(struc
 			return false;
 		}
 
+		memset(&fc->ac, 0, sizeof(fc->ac));
 		fc->ac.alist = alist;
-		fc->ac.addr  = NULL;
 		fc->ac.start = READ_ONCE(alist->index);
 		fc->ac.index = fc->ac.start;
-		fc->ac.error = 0;
-		fc->ac.begun = false;
 		goto iterate_address;
 
 	case 0:


Patches currently in stable-queue which might be from dhowells@redhat.com are

queue-4.15/afs-fix-missing-cursor-clearance.patch
queue-4.15/afs-add-missing-afs_put_cell.patch
queue-4.15/afs-need-to-clear-responded-flag-in-addr-cursor.patch
queue-4.15/afs-fix-server-list-handling.patch