linux-kernel - [PATCH 1/9] virtio_blk: eliminate anonymous module_init & module

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: <20220316192010.19001-2-rdunlap@infradead.org>
Date:   Wed, 16 Mar 2022 12:20:02 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Jens Axboe <axboe@...nel.dk>, Amit Shah <amit@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Eli Cohen <eli@...lanox.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Krzysztof Opasiak <k.opasiak@...sung.com>,
        Igor Kotrasinski <i.kotrasinsk@...sung.com>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Jussi Kivilinna <jussi.kivilinna@...et.fi>,
        Joachim Fritschi <jfritschi@...enet.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...nel.org>,
        Karol Herbst <karolherbst@...il.com>,
        Pekka Paalanen <ppaalanen@...il.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, netdev@...r.kernel.org,
        linux-block@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-usb@...r.kernel.org, nouveau@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org, x86@...nel.org
Subject: [PATCH 1/9] virtio_blk: eliminate anonymous module_init & module_exit

Eliminate anonymous module_init() and module_exit(), which can lead to
confusion or ambiguity when reading System.map, crashes/oops/bugs,
or an initcall_debug log.

Give each of these init and exit functions unique driver-specific
names to eliminate the anonymous names.

Example 1: (System.map)
 ffffffff832fc78c t init
 ffffffff832fc79e t init
 ffffffff832fc8f8 t init

Example 2: (initcall_debug log)
 calling  init+0x0/0x12 @ 1
 initcall init+0x0/0x12 returned 0 after 15 usecs
 calling  init+0x0/0x60 @ 1
 initcall init+0x0/0x60 returned 0 after 2 usecs
 calling  init+0x0/0x9a @ 1
 initcall init+0x0/0x9a returned 0 after 74 usecs

Fixes: e467cde23818 ("Block driver using virtio.")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jason Wang <jasowang@...hat.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Stefan Hajnoczi <stefanha@...hat.com>
Cc: virtualization@...ts.linux-foundation.org
Cc: Jens Axboe <axboe@...nel.dk>
Cc: linux-block@...r.kernel.org
---
 drivers/block/virtio_blk.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- lnx-517-rc8.orig/drivers/block/virtio_blk.c
+++ lnx-517-rc8/drivers/block/virtio_blk.c
@@ -1058,7 +1058,7 @@ static struct virtio_driver virtio_blk =
 #endif
 };
 
-static int __init init(void)
+static int __init virtio_blk_init(void)
 {
 	int error;
 
@@ -1084,14 +1084,14 @@ out_destroy_workqueue:
 	return error;
 }
 
-static void __exit fini(void)
+static void __exit virtio_blk_fini(void)
 {
 	unregister_virtio_driver(&virtio_blk);
 	unregister_blkdev(major, "virtblk");
 	destroy_workqueue(virtblk_wq);
 }
-module_init(init);
-module_exit(fini);
+module_init(virtio_blk_init);
+module_exit(virtio_blk_fini);
 
 MODULE_DEVICE_TABLE(virtio, id_table);
 MODULE_DESCRIPTION("Virtio block driver");