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reiserfs: Fix memory leak of journal device string 

commit 5474ca7da6 upstream.

When a filesystem is mounted with jdev mount option, we store the
journal device name in an allocated string in superblock. However we
fail to ever free that string. Fix it.

Reported-by: syzbot+1c6756baf4b16b94d2a6@syzkaller.appspotmail.com
Fixes: c3aa077648 ("reiserfs: Properly display mount options in /proc/mounts")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jan Kara 2019-12-12 11:30:03 +01:00 committed by Greg Kroah-Hartman
parent 9bcdb8ba5a
commit 761a10b67a
1 changed files with 2 additions and 0 deletions
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2
fs/reiserfs/super.c
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@ -629,6 +629,7 @@ static void reiserfs_put_super(struct super_block *s)
reiserfs_write_unlock(s);
mutex_destroy(&REISERFS_SB(s)->lock);
destroy_workqueue(REISERFS_SB(s)->commit_wq);
kfree(REISERFS_SB(s)->s_jdev);
kfree(s->s_fs_info);
s->s_fs_info = NULL;
}
@ -2240,6 +2241,7 @@ error_unlocked:
kfree(qf_names[j]);
}
#endif
kfree(sbi->s_jdev);
kfree(sbi);
s->s_fs_info = NULL;