This is a note to let you know that I've just added the patch titled
f2fs: fix overflow due to condition check order
to the 4.8-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:
f2fs-fix-overflow-due-to-condition-check-order.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e87f7329bbd6760c2acc4f1eb423362b08851a71 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Date: Wed, 23 Nov 2016 10:51:17 -0800
Subject: f2fs: fix overflow due to condition check order
From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
commit e87f7329bbd6760c2acc4f1eb423362b08851a71 upstream.
In the last ilen case, i was already increased, resulting in accessing out-
of-boundary entry of do_replace and blkaddr.
Fix to check ilen first to exit the loop.
Fixes: 2aa8fbb9693020 ("f2fs: refactor __exchange_data_block for speed up")
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/f2fs/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -970,7 +970,7 @@ static int __clone_blkaddrs(struct inode
new_size = (dst + i) << PAGE_SHIFT;
if (dst_inode->i_size < new_size)
f2fs_i_size_write(dst_inode, new_size);
- } while ((do_replace[i] || blkaddr[i] == NULL_ADDR) && --ilen);
+ } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
f2fs_put_dnode(&dn);
} else {
Patches currently in stable-queue which might be from jaegeuk@xxxxxxxxxx are
queue-4.8/f2fs-fix-overflow-due-to-condition-check-order.patch
queue-4.8/revert-f2fs-use-percpu_counter-for-of-dirty-pages-in-inode.patch
queue-4.8/f2fs-set-owner-for-debugfs-status-file-s-file_operations.patch
--
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