From: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Date: Wed, 17 May 2017 08:36:45 +0000 (+0200)
Subject: ubifs: Fix data node size for truncating uncompressed nodes
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=59a74990f85bb372c9117e40c6cd27693b6df670;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ubifs: Fix data node size for truncating uncompressed nodes

Currently, the function truncate_data_node only updates the
destination data node size if compression is used. For
uncompressed nodes, the old length is incorrectly retained.

This patch makes sure that the length is correctly set when
compression is disabled.

Fixes: 7799953b34d1 ("ubifs: Implement encrypt/decrypt for all IO")
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
---

diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index 294519b98874..f3b620cbdda4 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -1298,7 +1298,9 @@ static int truncate_data_node(const struct ubifs_info *c, const struct inode *in
 			goto out;
 	}
 
-	if (compr_type != UBIFS_COMPR_NONE) {
+	if (compr_type == UBIFS_COMPR_NONE) {
+		out_len = *new_len;
+	} else {
 		err = ubifs_decompress(c, &dn->data, dlen, buf, &out_len, compr_type);
 		if (err)
 			goto out;