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FAILED: patch "[PATCH] scsi: qla2xxx: Validate BSG request_len before reading" failed to apply to 5.10-stable tree

PATCH New [email protected] 2 participants 2 messages Sep 9 – Sep 11

Subsystems (3)
Stable branch SCSI QLogic QLA2XXX FC-SCSI driver
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#0 lore raw

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x 4cf38dd9465736141263ebb63375868311a0ec81
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026090915-deuce-pretender-e0d3@gregkh' --subject-prefix 'PATCH 5.10.y' 'HEAD^..'

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 4cf38dd9465736141263ebb63375868311a0ec81 Mon Sep 17 00:00:00 2001
From: Nilesh Javali <[email protected]>
Date: Thu, 30 Jul 2026 21:28:35 +0530
Subject: [PATCH] scsi: qla2xxx: Validate BSG request_len before reading
vendor_cmd[]

The FC BSG transport allocates job->request via memdup_user() using the exact user-supplied request_len. For FC_BSG_HST_VENDOR, fc_bsg_host_dispatch() only guarantees request_len covers msgcode and vendor_id; it does not account for the vendor_cmd[] flexible array.

qla2xxx then reads the command selector vendor_cmd[0] and, in several sub-handlers, vendor_cmd[1]/[2] or structures overlaid on the vendor command area without verifying request_len. A caller holding CAP_SYS_RAWIO can submit a short request whose vendor_id matches the host, triggering out-of-bounds heap reads (KASAN-detectable, and able to mis-select a command or panic).

Add a central guard in qla2x00_process_vendor_specific() so the selector is always in bounds, restrict the early vendor_cmd[0] read in qla24xx_bsg_request() to sufficiently long vendor messages, and add request_len checks to the sub-handlers that read further:
qla24xx_proc_fcp_prio_cfg_cmd(), qla2x00_process_loopback(), qla84xx_reset(), qla84xx_updatefw(), qla2x00_read_optrom(), qla2x00_update_optrom(), qlafx00_mgmt_cmd() and qla28xx_validate_flash_image().

Fixes 01e0e15c8b3b ("scsi: don't use fc_bsg_job::request and fc_bsg_job::reply directly")
Cc [email protected]
Reported-by Sashiko <[email protected]>
Signed-off-by Nilesh Javali <[email protected]>
Link https://patch.msgid.link/[email protected] open here
Signed-off-by Martin K. Petersen (Oracle) <[email protected]>
drivers/scsi/qla2xxx/qla_bsg.c +53 -4
index 49f66f37b1a7..7fe7480fdc1b 100644
@@ -160,6 +160,12 @@ qla24xx_proc_fcp_prio_cfg_cmd(struct bsg_job *bsg_job)
 		goto exit_fcp_prio_cfg;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t)) {
+		ret = -EINVAL;
+		goto exit_fcp_prio_cfg;
+	}
+
 	/* Get the sub command */
 	oper = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
 

@@ -758,6 +764,10 @@ qla2x00_process_loopback(struct bsg_job *bsg_job)
 		return -EIO;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 3 * sizeof(uint32_t))
+		return -EINVAL;
+
 	memset(&elreq, 0, sizeof(elreq));
 
 	elreq.req_sg_cnt = dma_map_sg(&ha->pdev->dev,

@@ -990,6 +1000,10 @@ qla84xx_reset(struct bsg_job *bsg_job)
 		return -EINVAL;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
 	flag = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
 
 	rval = qla84xx_reset_chip(vha, flag == A84_ISSUE_RESET_DIAG_FW);

@@ -1034,6 +1048,10 @@ qla84xx_updatefw(struct bsg_job *bsg_job)
 		return -EINVAL;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
 	sg_cnt = dma_map_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list,
 		bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
 	if (!sg_cnt) {

@@ -1511,9 +1529,15 @@ qla2x00_read_optrom(struct bsg_job *bsg_job)
 	struct Scsi_Host *host = fc_bsg_to_shost(bsg_job);
 	scsi_qla_host_t *vha = shost_priv(host);
 	struct qla_hw_data *ha = vha->hw;
-	uint32_t start = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
+	uint32_t start;
 	int rval = 0;
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
+	start = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
+
 	if (ha->flags.nic_core_reset_hdlr_active)
 		return -EBUSY;
 

@@ -1556,9 +1580,15 @@ qla2x00_update_optrom(struct bsg_job *bsg_job)
 	struct Scsi_Host *host = fc_bsg_to_shost(bsg_job);
 	scsi_qla_host_t *vha = shost_priv(host);
 	struct qla_hw_data *ha = vha->hw;
-	uint32_t start = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
+	uint32_t start;
 	int rval = 0;
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
+	start = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
+
 	mutex_lock(&ha->optrom_mutex);
 	rval = qla2x00_optrom_setup(bsg_job, vha, start, 1);
 	if (rval) {

@@ -2411,6 +2441,11 @@ qlafx00_mgmt_cmd(struct bsg_job *bsg_job)
 	struct fc_port *fcport;
 	char  *type = "FC_BSG_HST_FX_MGMT";
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + sizeof(uint32_t) +
+	    sizeof(struct qla_mt_iocb_rqst_fx00))
+		return -EINVAL;
+
 	/* Copy the IOCB specific information */
 	piocb_rqst = (struct qla_mt_iocb_rqst_fx00 *)
 	    &bsg_request->rqst_data.h_vendor.vendor_cmd[1];

@@ -3332,6 +3367,13 @@ qla2x00_process_vendor_specific(struct scsi_qla_host *vha, struct bsg_job *bsg_j
 {
 	struct fc_bsg_request *bsg_request = bsg_job->request;
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + sizeof(uint32_t)) {
+		ql_log(ql_log_warn, vha, 0x7000,
+		       "BSG request too small for vendor cmd.\n");
+		return -EINVAL;
+	}
+
 	ql_dbg(ql_dbg_edif, vha, 0x911b, "%s FC_BSG_HST_VENDOR cmd[0]=0x%x\n",
 	    __func__, bsg_request->rqst_data.h_vendor.vendor_cmd[0]);
 

@@ -3475,8 +3517,11 @@ qla24xx_bsg_request(struct bsg_job *bsg_job)
 	}
 
 	/* Disable port will bring down the chip, allow enable command */
-	if (bsg_request->rqst_data.h_vendor.vendor_cmd[0] == QL_VND_MANAGE_HOST_PORT ||
-	    bsg_request->rqst_data.h_vendor.vendor_cmd[0] == QL_VND_GET_HOST_STATS)
+	if (bsg_request->msgcode == FC_BSG_HST_VENDOR &&
+	    bsg_job->request_len >=
+		sizeof(struct fc_bsg_request) + sizeof(uint32_t) &&
+	    (bsg_request->rqst_data.h_vendor.vendor_cmd[0] == QL_VND_MANAGE_HOST_PORT ||
+	     bsg_request->rqst_data.h_vendor.vendor_cmd[0] == QL_VND_GET_HOST_STATS))
 		goto skip_chip_chk;
 
 	if (vha->hw->flags.port_isolated) {

@@ -3785,6 +3830,10 @@ static int qla28xx_validate_flash_image(struct bsg_job *bsg_job)
 	if (!IS_QLA28XX(ha) || vha->vp_idx != 0)
 		return -EPERM;
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
 	mutex_lock(&ha->optrom_mutex);
 	rval = qla28xx_do_validate_flash_image(bsg_job, &state);
 	if (rval)
maintainer
#1 lore raw

PATCH 1/1 scsi: qla2xxx: Validate BSG request_len before reading vendor_cmd[]

From: Nilesh Javali <[email protected]>

[ Upstream commit 4cf38dd9465736141263ebb63375868311a0ec81 ]

The FC BSG transport allocates job->request via memdup_user() using the exact user-supplied request_len. For FC_BSG_HST_VENDOR, fc_bsg_host_dispatch() only guarantees request_len covers msgcode and vendor_id; it does not account for the vendor_cmd[] flexible array.

qla2xxx then reads the command selector vendor_cmd[0] and, in several sub-handlers, vendor_cmd[1]/[2] or structures overlaid on the vendor command area without verifying request_len. A caller holding CAP_SYS_RAWIO can submit a short request whose vendor_id matches the host, triggering out-of-bounds heap reads (KASAN-detectable, and able to mis-select a command or panic).

Add a central guard in qla2x00_process_vendor_specific() so the selector is always in bounds, restrict the early vendor_cmd[0] read in qla24xx_bsg_request() to sufficiently long vendor messages, and add request_len checks to the sub-handlers that read further:
qla24xx_proc_fcp_prio_cfg_cmd(), qla2x00_process_loopback(), qla84xx_reset(), qla84xx_updatefw(), qla2x00_read_optrom(), qla2x00_update_optrom(), qlafx00_mgmt_cmd() and qla28xx_validate_flash_image().

Fixes 01e0e15c8b3b ("scsi: don't use fc_bsg_job::request and fc_bsg_job::reply directly")
Cc [email protected]
Reported-by Sashiko <[email protected]>
Signed-off-by Nilesh Javali <[email protected]>
Link https://patch.msgid.link/[email protected] open here
Signed-off-by Martin K. Petersen (Oracle) <[email protected]>
[ adapted validation to the older qla2xxx handler layout. ]
Signed-off-by Sasha Levin <[email protected]>
---
 drivers/scsi/qla2xxx/qla_bsg.c | 39 ++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
drivers/scsi/qla2xxx/qla_bsg.c +39 -0
index c37945ac9eca7..836b6d9e1d3ef 100644
@@ -140,6 +140,12 @@ qla24xx_proc_fcp_prio_cfg_cmd(struct bsg_job *bsg_job)
 		goto exit_fcp_prio_cfg;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t)) {
+		ret = -EINVAL;
+		goto exit_fcp_prio_cfg;
+	}
+
 	/* Get the sub command */
 	oper = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
 

@@ -733,6 +739,10 @@ qla2x00_process_loopback(struct bsg_job *bsg_job)
 		return -EIO;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 3 * sizeof(uint32_t))
+		return -EINVAL;
+
 	memset(&elreq, 0, sizeof(elreq));
 
 	elreq.req_sg_cnt = dma_map_sg(&ha->pdev->dev,

@@ -965,6 +975,10 @@ qla84xx_reset(struct bsg_job *bsg_job)
 		return -EINVAL;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
 	flag = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
 
 	rval = qla84xx_reset_chip(vha, flag == A84_ISSUE_RESET_DIAG_FW);

@@ -1009,6 +1023,10 @@ qla84xx_updatefw(struct bsg_job *bsg_job)
 		return -EINVAL;
 	}
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
 	sg_cnt = dma_map_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list,
 		bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
 	if (!sg_cnt) {

@@ -1459,6 +1477,10 @@ qla2x00_read_optrom(struct bsg_job *bsg_job)
 	struct qla_hw_data *ha = vha->hw;
 	int rval = 0;
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
 	if (ha->flags.nic_core_reset_hdlr_active)
 		return -EBUSY;
 

@@ -1496,6 +1518,10 @@ qla2x00_update_optrom(struct bsg_job *bsg_job)
 	struct qla_hw_data *ha = vha->hw;
 	int rval = 0;
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + 2 * sizeof(uint32_t))
+		return -EINVAL;
+
 	mutex_lock(&ha->optrom_mutex);
 	rval = qla2x00_optrom_setup(bsg_job, vha, 1);
 	if (rval) {

@@ -1968,6 +1994,11 @@ qlafx00_mgmt_cmd(struct bsg_job *bsg_job)
 	struct fc_port *fcport;
 	char  *type = "FC_BSG_HST_FX_MGMT";
 
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + sizeof(uint32_t) +
+	    sizeof(struct qla_mt_iocb_rqst_fx00))
+		return -EINVAL;
+
 	/* Copy the IOCB specific information */
 	piocb_rqst = (struct qla_mt_iocb_rqst_fx00 *)
 	    &bsg_request->rqst_data.h_vendor.vendor_cmd[1];

@@ -2444,6 +2475,14 @@ static int
 qla2x00_process_vendor_specific(struct bsg_job *bsg_job)
 {
 	struct fc_bsg_request *bsg_request = bsg_job->request;
+	scsi_qla_host_t *vha = shost_priv(fc_bsg_to_shost(bsg_job));
+
+	if (bsg_job->request_len <
+	    sizeof(struct fc_bsg_request) + sizeof(uint32_t)) {
+		ql_log(ql_log_warn, vha, 0x7000,
+		       "BSG request too small for vendor cmd.\n");
+		return -EINVAL;
+	}
 
 	switch (bsg_request->rqst_data.h_vendor.vendor_cmd[0]) {
 	case QL_VND_LOOPBACK:
Signature · 1 line
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