linux-kernel - [PATCH net] bnxt_en: Adjust logging of firmware messages in case of released token in __hwrm

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240607070613.12156-1-amishin@t-argos.ru>
Date: Fri, 7 Jun 2024 10:06:13 +0300
From: Aleksandr Mishin <amishin@...rgos.ru>
To: Edwin Peer <edwin.peer@...adcom.com>
CC: Aleksandr Mishin <amishin@...rgos.ru>, Michael Chan
	<michael.chan@...adcom.com>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <lvc-project@...uxtesting.org>
Subject: [PATCH net] bnxt_en: Adjust logging of firmware messages in case of released token in __hwrm_send()

In case of token is released due to token->state == BNXT_HWRM_DEFERRED,
released token (set to NULL) is used in log messages. This issue is
expected to be prevented by HWRM_ERR_CODE_PF_UNAVAILABLE error code. But
this error code is returned by recent firmware. So some firmware may not
return it. This may lead to NULL pointer dereference.
Adjust this issue by adding token pointer check.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 8fa4219dba8e ("bnxt_en: add dynamic debug support for HWRM messages")
Signed-off-by: Aleksandr Mishin <amishin@...rgos.ru>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
index 1df3d56cc4b5..14585ac476c8 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
@@ -678,7 +678,7 @@ static int __hwrm_send(struct bnxt *bp, struct bnxt_hwrm_ctx *ctx)
 	if (rc == HWRM_ERR_CODE_BUSY && !(ctx->flags & BNXT_HWRM_CTX_SILENT))
 		netdev_warn(bp->dev, "FW returned busy, hwrm req_type 0x%x\n",
 			    req_type);
-	else if (rc && rc != HWRM_ERR_CODE_PF_UNAVAILABLE)
+	else if (rc && token && rc != HWRM_ERR_CODE_PF_UNAVAILABLE)
 		hwrm_err(bp, ctx, "hwrm req_type 0x%x seq id 0x%x error 0x%x\n",
 			 req_type, token->seq_id, rc);
 	rc = __hwrm_to_stderr(rc);
-- 
2.30.2