From: Richard Weinberger <richard@nod.at>
Date: Tue, 20 Sep 2016 08:08:30 +0000 (+0200)
Subject: ubifs: Fix xattr_names length in exit paths
X-Git-Tag: v4.1.36~52
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cad1ca2a9485333c04581c69bbbe52fbd410d9ec;p=platform%2Fkernel%2Flinux-exynos.git

ubifs: Fix xattr_names length in exit paths

[ Upstream commit 843741c5778398ea67055067f4cc65ae6c80ca0e ]

When the operation fails we also have to undo the changes
we made to ->xattr_names. Otherwise listxattr() will report
wrong lengths.

Cc: stable@vger.kernel.org
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
---

diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index fd65b3f1923c..7270162b72e4 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -173,6 +173,7 @@ out_cancel:
 	host_ui->xattr_cnt -= 1;
 	host_ui->xattr_size -= CALC_DENT_SIZE(nm->len);
 	host_ui->xattr_size -= CALC_XATTR_BYTES(size);
+	host_ui->xattr_names -= nm->len;
 	mutex_unlock(&host_ui->ui_mutex);
 out_free:
 	make_bad_inode(inode);
@@ -527,6 +528,7 @@ out_cancel:
 	host_ui->xattr_cnt += 1;
 	host_ui->xattr_size += CALC_DENT_SIZE(nm->len);
 	host_ui->xattr_size += CALC_XATTR_BYTES(ui->data_len);
+	host_ui->xattr_names += nm->len;
 	mutex_unlock(&host_ui->ui_mutex);
 	ubifs_release_budget(c, &req);
 	make_bad_inode(inode);