linux-kernel - [PATCH v5 13/14] floppy: address add

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211103230437.1639990-14-mcgrof@kernel.org>
Date:   Wed,  3 Nov 2021 16:04:36 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     axboe@...nel.dk, hch@....de, penguin-kernel@...ove.sakura.ne.jp,
        dan.j.williams@...el.com, vishal.l.verma@...el.com,
        dave.jiang@...el.com, ira.weiny@...el.com, richard@....at,
        miquel.raynal@...tlin.com, vigneshr@...com, efremov@...ux.com,
        song@...nel.org, martin.petersen@...cle.com, hare@...e.de,
        jack@...e.cz, ming.lei@...hat.com, tj@...nel.org, mcgrof@...nel.org
Cc:     linux-mtd@...ts.infradead.org, linux-scsi@...r.kernel.org,
        linux-raid@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v5 13/14] floppy: address add_disk() error handling on probe

We need to cleanup resources on the probe() callback registered
with __register_blkdev(), now that add_disk() error handling is
supported. Address this.

Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 drivers/block/floppy.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 3873e789478e..c4267da716fe 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4528,10 +4528,19 @@ static void floppy_probe(dev_t dev)
 		return;
 
 	mutex_lock(&floppy_probe_lock);
-	if (!disks[drive][type]) {
-		if (floppy_alloc_disk(drive, type) == 0)
-			add_disk(disks[drive][type]);
-	}
+	if (disks[drive][type])
+		goto out;
+	if (floppy_alloc_disk(drive, type))
+		goto out;
+	if (add_disk(disks[drive][type]))
+		goto cleanup_disk;
+out:
+	mutex_unlock(&floppy_probe_lock);
+	return;
+
+cleanup_disk:
+	blk_cleanup_disk(disks[drive][type]);
+	disks[drive][type] = NULL;
 	mutex_unlock(&floppy_probe_lock);
 }
 
-- 
2.33.0