linux-kernel - [PATCH 4.14 084/124] ext4: fix possible leak of s_journal_flag

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Date:   Mon, 19 Nov 2018 17:28:58 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vasily Averin <vvs@...tuozzo.com>,
        Theodore Tso <tytso@....edu>, stable@...nel.org
Subject: [PATCH 4.14 084/124] ext4: fix possible leak of s_journal_flag_rwsem in error path

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vasily Averin <vvs@...tuozzo.com>

commit af18e35bfd01e6d65a5e3ef84ffe8b252d1628c5 upstream.

Fixes: c8585c6fcaf2 ("ext4: fix races between changing inode journal ...")
Signed-off-by: Vasily Averin <vvs@...tuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Cc: stable@...nel.org # 4.7
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ext4/super.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4442,6 +4442,7 @@ failed_mount6:
 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
 	percpu_counter_destroy(&sbi->s_dirs_counter);
 	percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
+	percpu_free_rwsem(&sbi->s_journal_flag_rwsem);
 failed_mount5:
 	ext4_ext_release(sb);
 	ext4_release_system_zone(sb);