ext4: fix possible leak of s_journal_flag_rwsem in error path

commit af18e35bfd01e6d65a5e3ef84ffe8b252d1628c5 upstream.

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

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d587380..8a149df 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4509,6 +4509,7 @@ 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);