All of lore.kernel.org
 help / color / mirror / Atom feed
From: Takashi Iwai <tiwai@suse.de>
To: netdev@vger.kernel.org
Cc: "David S . Miller" <davem@davemloft.net>,
	Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
	intel-wired-lan@lists.osuosl.org
Subject: [PATCH 2/7] i40e: Use scnprintf() for avoiding potential buffer overflow
Date: Wed, 11 Mar 2020 09:37:40 +0100	[thread overview]
Message-ID: <20200311083745.17328-3-tiwai@suse.de> (raw)
In-Reply-To: <20200311083745.17328-1-tiwai@suse.de>

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: intel-wired-lan@lists.osuosl.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 8c3e753bfb9d..ff431c13f858 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -14478,29 +14478,29 @@ static void i40e_print_features(struct i40e_pf *pf)
 
 	i = snprintf(buf, INFO_STRING_LEN, "Features: PF-id[%d]", hw->pf_id);
 #ifdef CONFIG_PCI_IOV
-	i += snprintf(&buf[i], REMAIN(i), " VFs: %d", pf->num_req_vfs);
+	i += scnprintf(&buf[i], REMAIN(i), " VFs: %d", pf->num_req_vfs);
 #endif
-	i += snprintf(&buf[i], REMAIN(i), " VSIs: %d QP: %d",
+	i += scnprintf(&buf[i], REMAIN(i), " VSIs: %d QP: %d",
 		      pf->hw.func_caps.num_vsis,
 		      pf->vsi[pf->lan_vsi]->num_queue_pairs);
 	if (pf->flags & I40E_FLAG_RSS_ENABLED)
-		i += snprintf(&buf[i], REMAIN(i), " RSS");
+		i += scnprintf(&buf[i], REMAIN(i), " RSS");
 	if (pf->flags & I40E_FLAG_FD_ATR_ENABLED)
-		i += snprintf(&buf[i], REMAIN(i), " FD_ATR");
+		i += scnprintf(&buf[i], REMAIN(i), " FD_ATR");
 	if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
-		i += snprintf(&buf[i], REMAIN(i), " FD_SB");
-		i += snprintf(&buf[i], REMAIN(i), " NTUPLE");
+		i += scnprintf(&buf[i], REMAIN(i), " FD_SB");
+		i += scnprintf(&buf[i], REMAIN(i), " NTUPLE");
 	}
 	if (pf->flags & I40E_FLAG_DCB_CAPABLE)
-		i += snprintf(&buf[i], REMAIN(i), " DCB");
-	i += snprintf(&buf[i], REMAIN(i), " VxLAN");
-	i += snprintf(&buf[i], REMAIN(i), " Geneve");
+		i += scnprintf(&buf[i], REMAIN(i), " DCB");
+	i += scnprintf(&buf[i], REMAIN(i), " VxLAN");
+	i += scnprintf(&buf[i], REMAIN(i), " Geneve");
 	if (pf->flags & I40E_FLAG_PTP)
-		i += snprintf(&buf[i], REMAIN(i), " PTP");
+		i += scnprintf(&buf[i], REMAIN(i), " PTP");
 	if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
-		i += snprintf(&buf[i], REMAIN(i), " VEB");
+		i += scnprintf(&buf[i], REMAIN(i), " VEB");
 	else
-		i += snprintf(&buf[i], REMAIN(i), " VEPA");
+		i += scnprintf(&buf[i], REMAIN(i), " VEPA");
 
 	dev_info(&pf->pdev->dev, "%s\n", buf);
 	kfree(buf);
-- 
2.16.4


WARNING: multiple messages have this Message-ID (diff)
From: Takashi Iwai <tiwai@suse.de>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [PATCH 2/7] i40e: Use scnprintf() for avoiding potential buffer overflow
Date: Wed, 11 Mar 2020 09:37:40 +0100	[thread overview]
Message-ID: <20200311083745.17328-3-tiwai@suse.de> (raw)
In-Reply-To: <20200311083745.17328-1-tiwai@suse.de>

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: intel-wired-lan at lists.osuosl.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 8c3e753bfb9d..ff431c13f858 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -14478,29 +14478,29 @@ static void i40e_print_features(struct i40e_pf *pf)
 
 	i = snprintf(buf, INFO_STRING_LEN, "Features: PF-id[%d]", hw->pf_id);
 #ifdef CONFIG_PCI_IOV
-	i += snprintf(&buf[i], REMAIN(i), " VFs: %d", pf->num_req_vfs);
+	i += scnprintf(&buf[i], REMAIN(i), " VFs: %d", pf->num_req_vfs);
 #endif
-	i += snprintf(&buf[i], REMAIN(i), " VSIs: %d QP: %d",
+	i += scnprintf(&buf[i], REMAIN(i), " VSIs: %d QP: %d",
 		      pf->hw.func_caps.num_vsis,
 		      pf->vsi[pf->lan_vsi]->num_queue_pairs);
 	if (pf->flags & I40E_FLAG_RSS_ENABLED)
-		i += snprintf(&buf[i], REMAIN(i), " RSS");
+		i += scnprintf(&buf[i], REMAIN(i), " RSS");
 	if (pf->flags & I40E_FLAG_FD_ATR_ENABLED)
-		i += snprintf(&buf[i], REMAIN(i), " FD_ATR");
+		i += scnprintf(&buf[i], REMAIN(i), " FD_ATR");
 	if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
-		i += snprintf(&buf[i], REMAIN(i), " FD_SB");
-		i += snprintf(&buf[i], REMAIN(i), " NTUPLE");
+		i += scnprintf(&buf[i], REMAIN(i), " FD_SB");
+		i += scnprintf(&buf[i], REMAIN(i), " NTUPLE");
 	}
 	if (pf->flags & I40E_FLAG_DCB_CAPABLE)
-		i += snprintf(&buf[i], REMAIN(i), " DCB");
-	i += snprintf(&buf[i], REMAIN(i), " VxLAN");
-	i += snprintf(&buf[i], REMAIN(i), " Geneve");
+		i += scnprintf(&buf[i], REMAIN(i), " DCB");
+	i += scnprintf(&buf[i], REMAIN(i), " VxLAN");
+	i += scnprintf(&buf[i], REMAIN(i), " Geneve");
 	if (pf->flags & I40E_FLAG_PTP)
-		i += snprintf(&buf[i], REMAIN(i), " PTP");
+		i += scnprintf(&buf[i], REMAIN(i), " PTP");
 	if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
-		i += snprintf(&buf[i], REMAIN(i), " VEB");
+		i += scnprintf(&buf[i], REMAIN(i), " VEB");
 	else
-		i += snprintf(&buf[i], REMAIN(i), " VEPA");
+		i += scnprintf(&buf[i], REMAIN(i), " VEPA");
 
 	dev_info(&pf->pdev->dev, "%s\n", buf);
 	kfree(buf);
-- 
2.16.4


  parent reply	other threads:[~2020-03-11  8:38 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-11  8:37 [PATCH 0/7] net: Use scnprintf() for avoiding potential buffer overflow Takashi Iwai
2020-03-11  8:37 ` [PATCH 1/7] net: caif: " Takashi Iwai
2020-03-11  8:37 ` Takashi Iwai [this message]
2020-03-11  8:37   ` [Intel-wired-lan] [PATCH 2/7] i40e: " Takashi Iwai
2020-03-16 20:32   ` Bowers, AndrewX
2020-03-16 20:32     ` Bowers, AndrewX
2020-03-11  8:37 ` [PATCH 3/7] mlx4: " Takashi Iwai
2020-03-11  8:37 ` [PATCH 4/7] nfp: " Takashi Iwai
2020-03-11 11:01   ` [oss-drivers] " Simon Horman
2020-03-11 21:44   ` Jakub Kicinski
2020-03-11  8:37 ` [PATCH 5/7] ionic: " Takashi Iwai
2020-03-11 11:01   ` [oss-drivers] " Simon Horman
2020-03-11 16:45   ` Shannon Nelson
2020-03-11  8:37 ` [PATCH 6/7] sfc: " Takashi Iwai
2020-03-12  9:53   ` Martin Habets
2020-03-12 11:38     ` Takashi Iwai
2020-03-11  8:37 ` [PATCH 7/7] netdevsim: " Takashi Iwai

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=20200311083745.17328-3-tiwai@suse.de \
    --to=tiwai@suse.de \
    --cc=davem@davemloft.net \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=jeffrey.t.kirsher@intel.com \
    --cc=netdev@vger.kernel.org \
    /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.