[PATCH 6.1 0668/1146] RDMA/srp: Fix error return code in srp_parse_options()

28 Dec 2022

From: Wang Yufen wangyufen@huawei.com
[ Upstream commit ed461b30b22c8fa85c25189c14cb89f29595cd14 ]
In the previous iteration of the while loop, the "ret" may have been
assigned a value of 0, so the error return code -EINVAL may have been
incorrectly set to 0. To fix set valid return code before calling to
goto. Also investigate each case separately as Andy suggessted.
Fixes: e711f968c49c ("IB/srp: replace custom implementation of hex2bin()")
Fixes: 2a174df0c602 ("IB/srp: Use kstrtoull() instead of simple_strtoull()")
Fixes: 19f313438c77 ("IB/srp: Add RDMA/CM support")
Signed-off-by: Wang Yufen wangyufen@huawei.com
Link: https://lore.kernel.org/r/1669953638-11747-2-git-send-email-wangyufen@huawei...
Reviewed-by: Bart Van Assche bvanassche@acm.org
Signed-off-by: Leon Romanovsky leon@kernel.org
Signed-off-by: Sasha Levin sashal@kernel.org
---
 drivers/infiniband/ulp/srp/ib_srp.c | 96 ++++++++++++++++++++++++-----
 1 file changed, 82 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 1075c2ac8fe2..b4d6a4a5ae81 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -3410,7 +3410,8 @@ static int srp_parse_options(struct net *net, const char *buf,
    		break;
case SRP_OPT_PKEY:
-			if (match_hex(args, &token)) {
+			ret = match_hex(args, &token);
+			if (ret) {
    			pr_warn("bad P_Key parameter '%s'\n", p);
    			goto out;
    		}
@@ -3470,7 +3471,8 @@ static int srp_parse_options(struct net *net, const char *buf,
    		break;
case SRP_OPT_MAX_SECT:
-			if (match_int(args, &token)) {
+			ret = match_int(args, &token);
+			if (ret) {
    			pr_warn("bad max sect parameter '%s'\n", p);
    			goto out;
    		}
@@ -3478,8 +3480,15 @@ static int srp_parse_options(struct net *net, const char *buf,
    		break;
case SRP_OPT_QUEUE_SIZE:
-			if (match_int(args, &token) || token < 1) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for queue_size parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 1) {
    			pr_warn("bad queue_size parameter '%s'\n", p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->scsi_host->can_queue = token;
@@ -3490,25 +3499,40 @@ static int srp_parse_options(struct net *net, const char *buf,
    		break;
case SRP_OPT_MAX_CMD_PER_LUN:
-			if (match_int(args, &token) || token < 1) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for max cmd_per_lun parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 1) {
    			pr_warn("bad max cmd_per_lun parameter '%s'\n",
    				p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->scsi_host->cmd_per_lun = token;
    		break;
case SRP_OPT_TARGET_CAN_QUEUE:
-			if (match_int(args, &token) || token < 1) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for max target_can_queue parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 1) {
    			pr_warn("bad max target_can_queue parameter '%s'\n",
    				p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->target_can_queue = token;
    		break;
case SRP_OPT_IO_CLASS:
-			if (match_hex(args, &token)) {
+			ret = match_hex(args, &token);
+			if (ret) {
    			pr_warn("bad IO class parameter '%s'\n", p);
    			goto out;
    		}
@@ -3517,6 +3541,7 @@ static int srp_parse_options(struct net *net, const char *buf,
    			pr_warn("unknown IO class parameter value %x specified (use %x or %x).\n",
    				token, SRP_REV10_IB_IO_CLASS,
    				SRP_REV16A_IB_IO_CLASS);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->io_class = token;
@@ -3539,16 +3564,24 @@ static int srp_parse_options(struct net *net, const char *buf,
    		break;
case SRP_OPT_CMD_SG_ENTRIES:
-			if (match_int(args, &token) || token < 1 || token > 255) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for max cmd_sg_entries parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 1 || token > 255) {
    			pr_warn("bad max cmd_sg_entries parameter '%s'\n",
    				p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->cmd_sg_cnt = token;
    		break;
case SRP_OPT_ALLOW_EXT_SG:
-			if (match_int(args, &token)) {
+			ret = match_int(args, &token);
+			if (ret) {
    			pr_warn("bad allow_ext_sg parameter '%s'\n", p);
    			goto out;
    		}
@@ -3556,43 +3589,77 @@ static int srp_parse_options(struct net *net, const char *buf,
    		break;
case SRP_OPT_SG_TABLESIZE:
-			if (match_int(args, &token) || token < 1 ||
-					token > SG_MAX_SEGMENTS) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for max sg_tablesize parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 1 || token > SG_MAX_SEGMENTS) {
    			pr_warn("bad max sg_tablesize parameter '%s'\n",
    				p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->sg_tablesize = token;
    		break;
case SRP_OPT_COMP_VECTOR:
-			if (match_int(args, &token) || token < 0) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for comp_vector parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 0) {
    			pr_warn("bad comp_vector parameter '%s'\n", p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->comp_vector = token;
    		break;
case SRP_OPT_TL_RETRY_COUNT:
-			if (match_int(args, &token) || token < 2 || token > 7) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for tl_retry_count parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 2 || token > 7) {
    			pr_warn("bad tl_retry_count parameter '%s' (must be a number between 2 and 7)\n",
    				p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->tl_retry_count = token;
    		break;
case SRP_OPT_MAX_IT_IU_SIZE:
-			if (match_int(args, &token) || token < 0) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for max it_iu_size parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 0) {
    			pr_warn("bad maximum initiator to target IU size '%s'\n", p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->max_it_iu_size = token;
    		break;
case SRP_OPT_CH_COUNT:
-			if (match_int(args, &token) || token < 1) {
+			ret = match_int(args, &token);
+			if (ret) {
+				pr_warn("match_int() failed for channel count parameter '%s', Error %d\n",
+					p, ret);
+				goto out;
+			}
+			if (token < 1) {
    			pr_warn("bad channel count %s\n", p);
+				ret = -EINVAL;
    			goto out;
    		}
    		target->ch_count = token;
@@ -3601,6 +3668,7 @@ static int srp_parse_options(struct net *net, const char *buf,
    	default:
    		pr_warn("unknown parameter or missing value '%s' in target creation request\n",
    			p);
+			ret = -EINVAL;
    		goto out;
    	}
    }
-- 
2.35.1




    

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[PATCH 6.1 0668/1146] RDMA/srp: Fix error return code in srp_parse_options()