linux-kernel - [PATCH 3.10 164/319] ubifs: Fix xattr

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Message-Id: <1486322541-8206-65-git-send-email-w@1wt.eu>
Date:   Sun,  5 Feb 2017 20:19:46 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Richard Weinberger <richard@....at>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 164/319] ubifs: Fix xattr_names length in exit paths

From: Richard Weinberger <richard@....at>

commit 843741c5778398ea67055067f4cc65ae6c80ca0e upstream.

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

Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Willy Tarreau <w@....eu>
---
 fs/ubifs/xattr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index 0f7139b..69a42f3 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -167,6 +167,7 @@ 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);
@@ -514,6 +515,7 @@ 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);
-- 
2.8.0.rc2.1.gbe9624a