All of lore.kernel.org
 help / color / mirror / Atom feed
From: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
To: intel-wired-lan@lists.osuosl.org
Cc: pmenzel@molgen.mpg.de
Subject: [Intel-wired-lan] [PATCH net v3] ice: fix out-of-bounds KASAN warning in virtchnl
Date: Wed,  4 Jan 2023 09:25:17 +0100	[thread overview]
Message-ID: <20230104082517.117649-1-michal.swiatkowski@linux.intel.com> (raw)

KASAN reported:
[ 9793.708867] BUG: KASAN: global-out-of-bounds in ice_get_link_speed+0x16/0x30 [ice]
[ 9793.709205] Read of size 4 at addr ffffffffc1271b1c by task kworker/6:1/402

[ 9793.709222] CPU: 6 PID: 402 Comm: kworker/6:1 Kdump: loaded Tainted: G    B      OE      6.1.0+ #3
[ 9793.709235] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.00.01.0014.070920180847 07/09/2018
[ 9793.709245] Workqueue: ice ice_service_task [ice]
[ 9793.709575] Call Trace:
[ 9793.709582]  <TASK>
[ 9793.709588]  dump_stack_lvl+0x44/0x5c
[ 9793.709613]  print_report+0x17f/0x47b
[ 9793.709632]  ? __cpuidle_text_end+0x5/0x5
[ 9793.709653]  ? ice_get_link_speed+0x16/0x30 [ice]
[ 9793.709986]  ? ice_get_link_speed+0x16/0x30 [ice]
[ 9793.710317]  kasan_report+0xb7/0x140
[ 9793.710335]  ? ice_get_link_speed+0x16/0x30 [ice]
[ 9793.710673]  ice_get_link_speed+0x16/0x30 [ice]
[ 9793.711006]  ice_vc_notify_vf_link_state+0x14c/0x160 [ice]
[ 9793.711351]  ? ice_vc_repr_cfg_promiscuous_mode+0x120/0x120 [ice]
[ 9793.711698]  ice_vc_process_vf_msg+0x7a7/0xc00 [ice]
[ 9793.712074]  __ice_clean_ctrlq+0x98f/0xd20 [ice]
[ 9793.712534]  ? ice_bridge_setlink+0x410/0x410 [ice]
[ 9793.712979]  ? __request_module+0x320/0x520
[ 9793.713014]  ? ice_process_vflr_event+0x27/0x130 [ice]
[ 9793.713489]  ice_service_task+0x11cf/0x1950 [ice]
[ 9793.713948]  ? io_schedule_timeout+0xb0/0xb0
[ 9793.713972]  process_one_work+0x3d0/0x6a0
[ 9793.714003]  worker_thread+0x8a/0x610
[ 9793.714031]  ? process_one_work+0x6a0/0x6a0
[ 9793.714049]  kthread+0x164/0x1a0
[ 9793.714071]  ? kthread_complete_and_exit+0x20/0x20
[ 9793.714100]  ret_from_fork+0x1f/0x30
[ 9793.714137]  </TASK>

[ 9793.714151] The buggy address belongs to the variable:
[ 9793.714158]  ice_aq_to_link_speed+0x3c/0xffffffffffff3520 [ice]

[ 9793.714632] Memory state around the buggy address:
[ 9793.714642]  ffffffffc1271a00: f9 f9 f9 f9 00 00 05 f9 f9 f9 f9 f9 00 00 02 f9
[ 9793.714656]  ffffffffc1271a80: f9 f9 f9 f9 00 00 04 f9 f9 f9 f9 f9 00 00 00 00
[ 9793.714670] >ffffffffc1271b00: 00 00 00 04 f9 f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9
[ 9793.714680]                             ^
[ 9793.714690]  ffffffffc1271b80: 00 00 00 00 00 04 f9 f9 f9 f9 f9 f9 00 00 00 00
[ 9793.714704]  ffffffffc1271c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

The ICE_AQ_LINK_SPEED_UNKNOWN define is BIT(15). The value is bigger
than both legacy and normal link speed tables. Add one element (0 -
unknown) to both tables. There is no need to explicitly set table size,
leave it empty.

Fixes: 1d0e28a9be1f ("ice: Remove and replace ice speed defines with ethtool.h versions")
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
---
v2 --> v3:
 * remove double "---"
 * remove {}s in ice_conv_link_speed_to_virtchnl()
v1 --> v2:
 * follow Alex sugestions and remove all zero records from link speed
   tables and add validation for the index
 * fix commit message
---
 drivers/net/ethernet/intel/ice/ice_common.c |  9 ++++-----
 drivers/net/ethernet/intel/ice/ice_vf_mbx.c | 21 ++++++++-------------
 2 files changed, 12 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 4b78bfb0d7f9..d8efcec2fe5c 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -5562,7 +5562,7 @@ bool ice_fw_supports_report_dflt_cfg(struct ice_hw *hw)
  * returned by the firmware is a 16 bit * value, but is indexed
  * by [fls(speed) - 1]
  */
-static const u32 ice_aq_to_link_speed[15] = {
+static const u32 ice_aq_to_link_speed[] = {
 	SPEED_10,	/* BIT(0) */
 	SPEED_100,
 	SPEED_1000,
@@ -5574,10 +5574,6 @@ static const u32 ice_aq_to_link_speed[15] = {
 	SPEED_40000,
 	SPEED_50000,
 	SPEED_100000,	/* BIT(10) */
-	0,
-	0,
-	0,
-	0		/* BIT(14) */
 };
 
 /**
@@ -5588,5 +5584,8 @@ static const u32 ice_aq_to_link_speed[15] = {
  */
 u32 ice_get_link_speed(u16 index)
 {
+	if (index >= ARRAY_SIZE(ice_aq_to_link_speed))
+		return 0;
+
 	return ice_aq_to_link_speed[index];
 }
diff --git a/drivers/net/ethernet/intel/ice/ice_vf_mbx.c b/drivers/net/ethernet/intel/ice/ice_vf_mbx.c
index d4a4001b6e5d..f56fa94ff3d0 100644
--- a/drivers/net/ethernet/intel/ice/ice_vf_mbx.c
+++ b/drivers/net/ethernet/intel/ice/ice_vf_mbx.c
@@ -39,7 +39,7 @@ ice_aq_send_msg_to_vf(struct ice_hw *hw, u16 vfid, u32 v_opcode, u32 v_retval,
 	return ice_sq_send_cmd(hw, &hw->mailboxq, &desc, msg, msglen, cd);
 }
 
-static const u32 ice_legacy_aq_to_vc_speed[15] = {
+static const u32 ice_legacy_aq_to_vc_speed[] = {
 	VIRTCHNL_LINK_SPEED_100MB,	/* BIT(0) */
 	VIRTCHNL_LINK_SPEED_100MB,
 	VIRTCHNL_LINK_SPEED_1GB,
@@ -51,10 +51,6 @@ static const u32 ice_legacy_aq_to_vc_speed[15] = {
 	VIRTCHNL_LINK_SPEED_40GB,
 	VIRTCHNL_LINK_SPEED_40GB,
 	VIRTCHNL_LINK_SPEED_40GB,
-	VIRTCHNL_LINK_SPEED_UNKNOWN,
-	VIRTCHNL_LINK_SPEED_UNKNOWN,
-	VIRTCHNL_LINK_SPEED_UNKNOWN,
-	VIRTCHNL_LINK_SPEED_UNKNOWN	/* BIT(14) */
 };
 
 /**
@@ -71,21 +67,20 @@ static const u32 ice_legacy_aq_to_vc_speed[15] = {
  */
 u32 ice_conv_link_speed_to_virtchnl(bool adv_link_support, u16 link_speed)
 {
-	u32 speed;
+	/* convert a BIT() value into an array index */
+	u32 index = fls(link_speed) - 1;
 
-	if (adv_link_support) {
-		/* convert a BIT() value into an array index */
-		speed = ice_get_link_speed(fls(link_speed) - 1);
-	} else {
+	if (adv_link_support)
+		return ice_get_link_speed(index);
+	else if (index < ARRAY_SIZE(ice_legacy_aq_to_vc_speed))
 		/* Virtchnl speeds are not defined for every speed supported in
 		 * the hardware. To maintain compatibility with older AVF
 		 * drivers, while reporting the speed the new speed values are
 		 * resolved to the closest known virtchnl speeds
 		 */
-		speed = ice_legacy_aq_to_vc_speed[fls(link_speed) - 1];
-	}
+		return ice_legacy_aq_to_vc_speed[index];
 
-	return speed;
+	return VIRTCHNL_LINK_SPEED_UNKNOWN;
 }
 
 /* The mailbox overflow detection algorithm helps to check if there
-- 
2.36.1

_______________________________________________
Intel-wired-lan mailing list
Intel-wired-lan@osuosl.org
https://lists.osuosl.org/mailman/listinfo/intel-wired-lan

             reply	other threads:[~2023-01-04  8:40 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-04  8:25 Michal Swiatkowski [this message]
2023-01-04  8:44 ` [Intel-wired-lan] [PATCH net v3] ice: fix out-of-bounds KASAN warning in virtchnl Michal Swiatkowski
2023-01-13 10:41 ` G, GurucharanX

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=20230104082517.117649-1-michal.swiatkowski@linux.intel.com \
    --to=michal.swiatkowski@linux.intel.com \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=pmenzel@molgen.mpg.de \
    /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.