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Thu, 1 Feb 2024 17:49:07 GMT Received: from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7EADC58052; Thu, 1 Feb 2024 17:49:07 +0000 (GMT) Received: from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4376F58062; Thu, 1 Feb 2024 17:49:07 +0000 (GMT) Received: from linux.vnet.ibm.com (unknown [9.41.99.4]) by smtpav04.dal12v.mail.ibm.com (Postfix) with ESMTP; Thu, 1 Feb 2024 17:49:07 +0000 (GMT) From: Thinh Tran To: kuba@kernel.org Cc: netdev@vger.kernel.org, aelior@marvell.com, davem@davemloft.net, manishc@marvell.com, pabeni@redhat.com, skalluru@marvell.com, simon.horman@corigine.com, edumazet@google.com, VENKATA.SAI.DUGGI@ibm.com, drc@linux.vnet.ibm.com, abdhalee@in.ibm.com, thinhtr@linux.vnet.ibm.com Subject: [PATCH v7 1/2] net/bnx2x: Prevent access to a freed page in page_pool Date: Thu, 1 Feb 2024 11:48:21 -0600 Message-Id: <90238577e00a7a996767b84769b5e03ef840b13a.1706804455.git.thinhtr@linux.vnet.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: R35_jKJpokj1aV0GjDWV5C7y2BH6W3fy X-Proofpoint-ORIG-GUID: 8xMcrqU1e0EVlkRyWGlNA49l-u1pXpld X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-01_04,2024-01-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=732 priorityscore=1501 bulkscore=0 phishscore=0 malwarescore=0 spamscore=0 clxscore=1015 suspectscore=0 lowpriorityscore=0 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402010138 Verify page pool allocations before freeing. Signed-off-by: Thinh Tran --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h index d8b1824c334d..0bc1367fd649 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h @@ -1002,9 +1002,6 @@ static inline void bnx2x_set_fw_mac_addr(__le16 *fw_hi, __le16 *fw_mid, static inline void bnx2x_free_rx_mem_pool(struct bnx2x *bp, struct bnx2x_alloc_pool *pool) { - if (!pool->page) - return; - put_page(pool->page); pool->page = NULL; @@ -1015,6 +1012,9 @@ static inline void bnx2x_free_rx_sge_range(struct bnx2x *bp, { int i; + if (!fp->page_pool.page) + return; + if (fp->mode == TPA_MODE_DISABLED) return; -- 2.25.1