Patch "afs: Fix dangling folio ref counts in writeback" has been added to the 6.3-stable tree

[gregkh at linuxfoundation.org]

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

    afs: Fix dangling folio ref counts in writeback

to the 6.3-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-fix-dangling-folio-ref-counts-in-writeback.patch
and it can be found in the queue-6.3 subdirectory.

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


>From a2b6f2ab3e144f8e23666aafeba0e4d9ea4b7975 Mon Sep 17 00:00:00 2001
From: "Vishal Moola (Oracle)" <vishal.moola at gmail.com>
Date: Wed, 7 Jun 2023 13:41:19 -0700
Subject: afs: Fix dangling folio ref counts in writeback

From: Vishal Moola (Oracle) <vishal.moola at gmail.com>

commit a2b6f2ab3e144f8e23666aafeba0e4d9ea4b7975 upstream.

Commit acc8d8588cb7 converted afs_writepages_region() to write back a
folio batch. If writeback needs rescheduling, the function exits without
dropping the references to the folios in fbatch. This patch fixes that.

[DH: Moved the added line before the _leave()]

Fixes: acc8d8588cb7 ("afs: convert afs_writepages_region() to use filemap_get_folios_tag()")
Signed-off-by: Vishal Moola (Oracle) <vishal.moola at gmail.com>
Signed-off-by: David Howells <dhowells at redhat.com>
cc: Marc Dionne <marc.dionne at auristor.com>
cc: linux-afs at lists.infradead.org
Link: https://lore.kernel.org/r/20230607204120.89416-1-vishal.moola@gmail.com/
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 fs/afs/write.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/afs/write.c b/fs/afs/write.c
index c822d6006033..fd433024070e 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -763,6 +763,7 @@ static int afs_writepages_region(struct address_space *mapping,
 				if (wbc->sync_mode == WB_SYNC_NONE) {
 					if (skips >= 5 || need_resched()) {
 						*_next = start;
+						folio_batch_release(&fbatch);
 						_leave(" = 0 [%llx]", *_next);
 						return 0;
 					}
-- 
2.41.0



Patches currently in stable-queue which might be from vishal.moola at gmail.com are

queue-6.3/afs-fix-dangling-folio-ref-counts-in-writeback.patch
queue-6.3/afs-fix-waiting-for-writeback-then-skipping-folio.patch