From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C99C4EBADB for ; Wed, 16 Sep 2026 11:45:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789559146; cv=none; b=sz0WagulRYW7UYYie3W2QtM3/q0ozFeUNIqOt2vvN3rByAcig+dizdTUw2TJ1E5I5UK5KePJqpnZr4gG2bwbJ5zJLw6FiJVaQlH35EF6xQzMahGQ5XfO+vCFtu2FUFdO6bKwI84Daufwmy7167JlBPkwMMwZnIUxMBJ2CM3sigU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789559146; c=relaxed/simple; bh=oXMKRxhXI+cY6aNKiNQwTosmmBQba86zRlfAtpgk6G4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=RaynUKHu63ePggS07hYIg72Jyv/WN+Wyi6hWN5fYblZDI4YW1j/h1YZjgO6gHXqNNhFJFS4fcJKQ23/+Rqj+tyD483BZICkJblPKqfQ1xOR6TAk9a3jyRYdSusuEXN75FmB1S6W27TNE7tsHSuV/onYyFP7+jnC6DcHCoaH9Y+c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PuGqz4cD; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PuGqz4cD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B10B31F000FF; Wed, 16 Sep 2026 11:45:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789559139; bh=+JZv7j7QIkmFq/y0JVByroVutCG0XVcp8p5T3GkQKBA=; h=From:To:Cc:Subject:Date; b=PuGqz4cDUMMm34JxHLNB6hHMbDAnpMBG+2w6ZrJOKrQWL/u3PuXfU7YCvXbT0Z4oZ jgkAdKtP4clp0J4BSvknZP71M82sWNWvZtEVCkNE19B1RbXMPpsMeV5CAXZUgoYNzt /k0Ne7JxWq6U1UzQHEMnfupq5Bjtt+mStqogvzdKWjYiTTFQiI8t/Un+928HBNyBRM OJ4IO73X53TCfaX8SNAVUVLeS1YaR6AUOGXY/T/ididfE/FJinmseKmW7iRksA04mU Nq0UbaPLJgyvYgVhLGsd60Ppo2dIKRUBcizoCyHPWRli6o2Ua8UcsWGfEYlATqLAL3 48eFwBDWw81zQ== From: Arnd Bergmann To: Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , Maurizio Lombardi Cc: Arnd Bergmann , Hannes Reinecke , Nilay Shroff , John Garry , "Martin K. Petersen" , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] nvme: work around -Wformat-security warning Date: Wed, 16 Sep 2026 13:44:51 +0200 Message-ID: <20260916114533.237863-1-arnd@kernel.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Arnd Bergmann Passing a string variable into dev_set_name() causes a warning when building with -Wformat-security enabled: drivers/nvme/host/core.c: In function 'nvme_cdev_add': drivers/nvme/host/core.c:3911:9: error: format not a string literal and no format arguments [-Werror=format-security] 3911 | ret = dev_set_name(cdev_device, name); Remove the temporary strings and let dev_set_name() do the same thing internally. Fixes: 26acdaa357cd ("nvme: fix crash and memory leak during invalid cdev teardown") Signed-off-by: Arnd Bergmann --- drivers/nvme/host/core.c | 21 +++++++++------------ drivers/nvme/host/multipath.c | 12 +++++------- drivers/nvme/host/nvme.h | 6 +++--- 3 files changed, 17 insertions(+), 22 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index beea23d04a70..79f6a2c7923e 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3931,9 +3931,9 @@ void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device) put_device(cdev_device); } -int nvme_cdev_add(const char *name, struct cdev *cdev, - struct device *cdev_device, - const struct file_operations *fops, struct module *owner) +int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device, + const struct file_operations *fops, struct module *owner, + int ctrl, int head) { int minor, ret; @@ -3941,7 +3941,7 @@ int nvme_cdev_add(const char *name, struct cdev *cdev, if (minor < 0) return minor; - ret = dev_set_name(cdev_device, name); + ret = dev_set_name(cdev_device, "ng%dn%d", ctrl, head); if (ret) { ida_free(&nvme_ns_chr_minor_ida, minor); return ret; @@ -3982,17 +3982,14 @@ static const struct file_operations nvme_ns_chr_fops = { static void nvme_add_ns_cdev(struct nvme_ns *ns) { - char name[32]; - ns->cdev_device.parent = ns->ctrl->device; - snprintf(name, sizeof(name), "ng%dn%d", ns->ctrl->instance, - ns->head->instance); nvme_get_ns(ns); /* Undone in nvme_cdev_rel() */ - if (nvme_cdev_add(name, &ns->cdev, &ns->cdev_device, - &nvme_ns_chr_fops, ns->ctrl->ops->module)) { - dev_err(ns->ctrl->device, "Unable to create the %s device\n", - name); + if (nvme_cdev_add(&ns->cdev, &ns->cdev_device, + &nvme_ns_chr_fops, ns->ctrl->ops->module, + ns->ctrl->instance, ns->head->instance)) { + dev_err(ns->ctrl->device, "Unable to create the ng%dn%d device\n", + ns->ctrl->instance, ns->head->instance); nvme_put_ns(ns); return; } diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 75dbb58286a3..3d46c4f28a47 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -646,17 +646,15 @@ static const struct file_operations nvme_ns_head_chr_fops = { static void nvme_add_ns_head_cdev(struct nvme_ns_head *head) { - char name[32]; - head->cdev_device.parent = &head->subsys->dev; - snprintf(name, sizeof(name), "ng%dn%d", head->subsys->instance, - head->instance); nvme_get_ns_head(head); /* Undone in nvme_cdev_rel() */ - if (nvme_cdev_add(name, &head->cdev, &head->cdev_device, - &nvme_ns_head_chr_fops, THIS_MODULE)) { + if (nvme_cdev_add(&head->cdev, &head->cdev_device, + &nvme_ns_head_chr_fops, THIS_MODULE, + head->subsys->instance, head->instance)) { dev_err(disk_to_dev(head->disk), - "Unable to create the %s device\n", name); + "Unable to create the ng%dn%d device\n", + head->subsys->instance, head->instance); nvme_put_ns_head(head); return; } diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 2cff9fcbf740..e0260f4d24fd 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -1013,9 +1013,9 @@ int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi, void nvme_get_ns_head(struct nvme_ns_head *head); bool nvme_tryget_ns_head(struct nvme_ns_head *head); void nvme_put_ns_head(struct nvme_ns_head *head); -int nvme_cdev_add(const char *name, struct cdev *cdev, - struct device *cdev_device, - const struct file_operations *fops, struct module *owner); +int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device, + const struct file_operations *fops, struct module *owner, + int ctrl, int head); void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device); int nvme_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, unsigned long arg); -- 2.53.0