All of lore.kernel.org
 help / color / mirror / Atom feed
From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Woodhouse <dwmw2@infradead.org>, Liu Yi L <yi.l.liu@intel.com>
Cc: Lu Baolu <baolu.lu@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	Xin Zeng <xin.zeng@intel.com>,
	iommu@lists.linux-foundation.org,
	kernel-janitors@vger.kernel.org
Subject: [PATCH] iommu/vt-d: check for allocation failure in aux_detach_device()
Date: Wed, 12 May 2021 13:05:32 +0300	[thread overview]
Message-ID: <YJuobKuSn81dOPLd@mwanda> (raw)

In current kernels small allocations never fail, but checking for
allocation failure is the correct thing to do.

Fixes: 18abda7a2d55 ("iommu/vt-d: Fix general protection fault in aux_detach_device()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/iommu/intel/iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 708f430af1c4..9a7b79b5af18 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4606,6 +4606,8 @@ static int auxiliary_link_device(struct dmar_domain *domain,
 
 	if (!sinfo) {
 		sinfo = kzalloc(sizeof(*sinfo), GFP_ATOMIC);
+		if (!sinfo)
+			return -ENOMEM;
 		sinfo->domain = domain;
 		sinfo->pdev = dev;
 		list_add(&sinfo->link_phys, &info->subdevices);
-- 
2.30.2


WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Woodhouse <dwmw2@infradead.org>, Liu Yi L <yi.l.liu@intel.com>
Cc: kernel-janitors@vger.kernel.org,
	iommu@lists.linux-foundation.org, Will Deacon <will@kernel.org>
Subject: [PATCH] iommu/vt-d: check for allocation failure in aux_detach_device()
Date: Wed, 12 May 2021 13:05:32 +0300	[thread overview]
Message-ID: <YJuobKuSn81dOPLd@mwanda> (raw)

In current kernels small allocations never fail, but checking for
allocation failure is the correct thing to do.

Fixes: 18abda7a2d55 ("iommu/vt-d: Fix general protection fault in aux_detach_device()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/iommu/intel/iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 708f430af1c4..9a7b79b5af18 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4606,6 +4606,8 @@ static int auxiliary_link_device(struct dmar_domain *domain,
 
 	if (!sinfo) {
 		sinfo = kzalloc(sizeof(*sinfo), GFP_ATOMIC);
+		if (!sinfo)
+			return -ENOMEM;
 		sinfo->domain = domain;
 		sinfo->pdev = dev;
 		list_add(&sinfo->link_phys, &info->subdevices);
-- 
2.30.2

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

             reply	other threads:[~2021-05-12 10:06 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-12 10:05 Dan Carpenter [this message]
2021-05-12 10:05 ` [PATCH] iommu/vt-d: check for allocation failure in aux_detach_device() Dan Carpenter
2021-05-12 11:28 ` Lu Baolu
2021-05-12 11:28   ` Lu Baolu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YJuobKuSn81dOPLd@mwanda \
    --to=dan.carpenter@oracle.com \
    --cc=baolu.lu@linux.intel.com \
    --cc=dwmw2@infradead.org \
    --cc=iommu@lists.linux-foundation.org \
    --cc=joro@8bytes.org \
    --cc=kernel-janitors@vger.kernel.org \
    --cc=will@kernel.org \
    --cc=xin.zeng@intel.com \
    --cc=yi.l.liu@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.