[PATCH v2 1/2] RDMA/hfi1: Fix error return code in parse_platform_config()

[PATCH v2 1/2] RDMA/hfi1: Fix error return code in parse_platform_config()

[Wang Yufen]

In the previous while loop, "ret" may be assigned zero, so the error
return code may be incorrectly set to 0 instead of -EINVAL.
Add bail_with_einval goto label and covert all "goto bail;" to "goto
bail_with_einval:" where it's appropriate. Add dropping some duplicative
"ret = -EINVAL;" lines, as Andy suggessted.

Fixes: 97167e813415 ("staging/rdma/hfi1: Tune for unknown channel if configuration file is absent")
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
---
 drivers/infiniband/hw/hfi1/firmware.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/firmware.c b/drivers/infiniband/hw/hfi1/firmware.c
index 1d77514..44d8628 100644
--- a/drivers/infiniband/hw/hfi1/firmware.c
+++ b/drivers/infiniband/hw/hfi1/firmware.c
@@ -1730,7 +1730,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 	u32 *ptr = NULL;
 	u32 header1 = 0, header2 = 0, magic_num = 0, crc = 0, file_length = 0;
 	u32 record_idx = 0, table_type = 0, table_length_dwords = 0;
-	int ret = -EINVAL; /* assume failure */
+	int ret;
 
 	/*
 	 * For integrated devices that did not fall back to the default file,
@@ -1743,7 +1743,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 
 	if (!dd->platform_config.data) {
 		dd_dev_err(dd, "%s: Missing config file\n", __func__);
-		goto bail;
+		goto bail_with_einval;
 	}
 	ptr = (u32 *)dd->platform_config.data;
 
@@ -1751,7 +1751,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 	ptr++;
 	if (magic_num != PLATFORM_CONFIG_MAGIC_NUM) {
 		dd_dev_err(dd, "%s: Bad config file\n", __func__);
-		goto bail;
+		goto bail_with_einval;
 	}
 
 	/* Field is file size in DWORDs */
@@ -1774,7 +1774,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 	if (file_length > dd->platform_config.size) {
 		dd_dev_info(dd, "%s:File claims to be larger than read size\n",
 			    __func__);
-		goto bail;
+		goto bail_with_einval;
 	} else if (file_length < dd->platform_config.size) {
 		dd_dev_info(dd,
 			    "%s:File claims to be smaller than read size, continuing\n",
@@ -1794,7 +1794,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 			dd_dev_err(dd, "%s: Failed validation at offset %ld\n",
 				   __func__, (ptr - (u32 *)
 					      dd->platform_config.data));
-			goto bail;
+			goto bail_with_einval;
 		}
 
 		record_idx = *ptr &
@@ -1837,7 +1837,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 					   __func__, table_type,
 					   (ptr - (u32 *)
 					    dd->platform_config.data));
-				goto bail; /* We don't trust this file now */
+				goto bail_with_einval; /* We don't trust this file now */
 			}
 			pcfgcache->config_tables[table_type].table = ptr;
 		} else {
@@ -1856,7 +1856,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 					   __func__, table_type,
 					   (ptr -
 					    (u32 *)dd->platform_config.data));
-				goto bail; /* We don't trust this file now */
+				goto bail_with_einval; /* We don't trust this file now */
 			}
 			pcfgcache->config_tables[table_type].table_metadata =
 									ptr;
@@ -1873,8 +1873,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
 			dd_dev_err(dd, "%s: Failed CRC check at offset %ld\n",
 				   __func__, (ptr -
 				   (u32 *)dd->platform_config.data));
-			ret = -EINVAL;
-			goto bail;
+			goto bail_with_einval;
 		}
 		/* Jump the CRC DWORD */
 		ptr++;
@@ -1882,6 +1881,9 @@ int parse_platform_config(struct hfi1_devdata *dd)
 
 	pcfgcache->cache_valid = 1;
 	return 0;
+
+bail_with_einval:
+	ret = -EINVAL;
 bail:
 	memset(pcfgcache, 0, sizeof(struct platform_config_cache));
 	return ret;
-- 
1.8.3.1

[PATCH v2 2/2] RDMA/srp: Fix error return code in srp_parse_options()

[Wang Yufen]

In the previous while loop, "ret" may be assigned zero, , so the error
return code may be incorrectly set to 0 instead of -EINVAL.
Add out_with_einval goto label and covert all "goto out;" to "goto
out_with_einval:" where it's appropriate, alse 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>
---
 drivers/infiniband/ulp/srp/ib_srp.c | 82 +++++++++++++++++++++++++------------
 1 file changed, 56 insertions(+), 26 deletions(-)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 1075c2a..865ceb1 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -3343,7 +3343,7 @@ static int srp_parse_options(struct net *net, const char *buf,
 	bool has_port;
 	int opt_mask = 0;
 	int token;
-	int ret = -EINVAL;
+	int ret;
 	int i;
 
 	options = kstrdup(buf, GFP_KERNEL);
@@ -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;
 			}
@@ -3478,9 +3480,12 @@ static int srp_parse_options(struct net *net, const char *buf,
 			break;
 
 		case SRP_OPT_QUEUE_SIZE:
-			if (match_int(args, &token) || token < 1) {
-				pr_warn("bad queue_size parameter '%s'\n", p);
+			ret = match_int(args, &token);
+			if (ret)
 				goto out;
+			if (token < 1) {
+				pr_warn("bad queue_size parameter '%s'\n", p);
+				goto out_with_einval;
 			}
 			target->scsi_host->can_queue = token;
 			target->queue_size = token + SRP_RSP_SQ_SIZE +
@@ -3490,25 +3495,30 @@ 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)
+				goto out;
+			if (token < 1) {
 				pr_warn("bad max cmd_per_lun parameter '%s'\n",
 					p);
-				goto out;
+				goto out_with_einval;
 			}
 			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 (token < 1) {
 				pr_warn("bad max target_can_queue parameter '%s'\n",
 					p);
-				goto out;
+				goto out_with_einval;
 			}
 			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;
 			}
@@ -3517,7 +3527,7 @@ 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);
-				goto out;
+				goto out_with_einval;
 			}
 			target->io_class = token;
 			break;
@@ -3539,16 +3549,20 @@ 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)
+				goto out;
+			if (token < 1 || token > 255) {
 				pr_warn("bad max cmd_sg_entries parameter '%s'\n",
 					p);
-				goto out;
+				goto out_with_einval;
 			}
 			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;
 			}
@@ -3556,44 +3570,58 @@ 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)
+				goto out;
+			if (token < 1 || token > SG_MAX_SEGMENTS) {
 				pr_warn("bad max sg_tablesize parameter '%s'\n",
 					p);
-				goto out;
+				goto out_with_einval;
 			}
 			target->sg_tablesize = token;
 			break;
 
 		case SRP_OPT_COMP_VECTOR:
-			if (match_int(args, &token) || token < 0) {
-				pr_warn("bad comp_vector parameter '%s'\n", p);
+			ret = match_int(args, &token);
+			if (ret)
 				goto out;
+			if (token < 0) {
+				pr_warn("bad comp_vector parameter '%s'\n", p);
+				goto out_with_einval;
 			}
 			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)
+				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);
-				goto out;
+				goto out_with_einval;
 			}
 			target->tl_retry_count = token;
 			break;
 
 		case SRP_OPT_MAX_IT_IU_SIZE:
-			if (match_int(args, &token) || token < 0) {
-				pr_warn("bad maximum initiator to target IU size '%s'\n", p);
+			ret = match_int(args, &token);
+			if (ret)
 				goto out;
+			if (token < 0) {
+				pr_warn("bad maximum initiator to target IU size '%s'\n", p);
+				goto out_with_einval;
 			}
 			target->max_it_iu_size = token;
 			break;
 
 		case SRP_OPT_CH_COUNT:
-			if (match_int(args, &token) || token < 1) {
-				pr_warn("bad channel count %s\n", p);
+			ret = match_int(args, &token);
+			if (ret)
 				goto out;
+			if (token < 1) {
+				pr_warn("bad channel count %s\n", p);
+				goto out_with_einval;
 			}
 			target->ch_count = token;
 			break;
@@ -3601,7 +3629,7 @@ 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);
-			goto out;
+			goto out_with_einval;
 		}
 	}
 
@@ -3620,6 +3648,8 @@ static int srp_parse_options(struct net *net, const char *buf,
 			target->scsi_host->cmd_per_lun,
 			target->scsi_host->can_queue);
 
+out_with_einval:
+	ret = -EINVAL;
 out:
 	kfree(options);
 	return ret;
-- 
1.8.3.1

Re: [PATCH v2 2/2] RDMA/srp: Fix error return code in srp_parse_options()

[Andy Shevchenko]

On Sat, Nov 26, 2022 at 11:35:04AM +0800, Wang Yufen wrote:
> In the previous while loop, "ret" may be assigned zero, , so the error
> return code may be incorrectly set to 0 instead of -EINVAL.
> Add out_with_einval goto label and covert all "goto out;" to "goto
> out_with_einval:" where it's appropriate, alse investigate each case
> separately as Andy suggessted.

It's better now, though you missed something...

...

>  		case SRP_OPT_TARGET_CAN_QUEUE:
> -			if (match_int(args, &token) || token < 1) {
> +			ret = match_int(args, &token);

Check for ret?

> +			if (token < 1) {
>  				pr_warn("bad max target_can_queue parameter '%s'\n",
>  					p);
> -				goto out;
> +				goto out_with_einval;
>  			}
>  			target->target_can_queue = token;
>  			break;

...

>  			target->scsi_host->can_queue);

The below can't be like this, right?

> +out_with_einval:
> +	ret = -EINVAL;
>  out:
>  	kfree(options);
>  	return ret;

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 2/2] RDMA/srp: Fix error return code in srp_parse_options()

[Andy Shevchenko]

On Sat, Nov 26, 2022 at 02:02:14PM +0200, Andy Shevchenko wrote:
> On Sat, Nov 26, 2022 at 11:35:04AM +0800, Wang Yufen wrote:

...

> >  			target->scsi_host->can_queue);
> 
> The below can't be like this, right?
> 
> > +out_with_einval:
> > +	ret = -EINVAL;
> >  out:
> >  	kfree(options);
> >  	return ret;

One option is:

out:
	kfree(options);
	return ret;

out_with_einval:
	ret = -EINVAL;
	goto out;


-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 1/2] RDMA/hfi1: Fix error return code in parse_platform_config()

[Andy Shevchenko]

On Sat, Nov 26, 2022 at 11:35:03AM +0800, Wang Yufen wrote:
> In the previous while loop, "ret" may be assigned zero, so the error
> return code may be incorrectly set to 0 instead of -EINVAL.
> Add bail_with_einval goto label and covert all "goto bail;" to "goto
> bail_with_einval:" where it's appropriate. Add dropping some duplicative
> "ret = -EINVAL;" lines, as Andy suggessted.

This one looks good to me, FWIW,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

> Fixes: 97167e813415 ("staging/rdma/hfi1: Tune for unknown channel if configuration file is absent")
> Signed-off-by: Wang Yufen <wangyufen@huawei.com>
> ---
>  drivers/infiniband/hw/hfi1/firmware.c | 20 +++++++++++---------
>  1 file changed, 11 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/hfi1/firmware.c b/drivers/infiniband/hw/hfi1/firmware.c
> index 1d77514..44d8628 100644
> --- a/drivers/infiniband/hw/hfi1/firmware.c
> +++ b/drivers/infiniband/hw/hfi1/firmware.c
> @@ -1730,7 +1730,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  	u32 *ptr = NULL;
>  	u32 header1 = 0, header2 = 0, magic_num = 0, crc = 0, file_length = 0;
>  	u32 record_idx = 0, table_type = 0, table_length_dwords = 0;
> -	int ret = -EINVAL; /* assume failure */
> +	int ret;
>  
>  	/*
>  	 * For integrated devices that did not fall back to the default file,
> @@ -1743,7 +1743,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  
>  	if (!dd->platform_config.data) {
>  		dd_dev_err(dd, "%s: Missing config file\n", __func__);
> -		goto bail;
> +		goto bail_with_einval;
>  	}
>  	ptr = (u32 *)dd->platform_config.data;
>  
> @@ -1751,7 +1751,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  	ptr++;
>  	if (magic_num != PLATFORM_CONFIG_MAGIC_NUM) {
>  		dd_dev_err(dd, "%s: Bad config file\n", __func__);
> -		goto bail;
> +		goto bail_with_einval;
>  	}
>  
>  	/* Field is file size in DWORDs */
> @@ -1774,7 +1774,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  	if (file_length > dd->platform_config.size) {
>  		dd_dev_info(dd, "%s:File claims to be larger than read size\n",
>  			    __func__);
> -		goto bail;
> +		goto bail_with_einval;
>  	} else if (file_length < dd->platform_config.size) {
>  		dd_dev_info(dd,
>  			    "%s:File claims to be smaller than read size, continuing\n",
> @@ -1794,7 +1794,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  			dd_dev_err(dd, "%s: Failed validation at offset %ld\n",
>  				   __func__, (ptr - (u32 *)
>  					      dd->platform_config.data));
> -			goto bail;
> +			goto bail_with_einval;
>  		}
>  
>  		record_idx = *ptr &
> @@ -1837,7 +1837,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  					   __func__, table_type,
>  					   (ptr - (u32 *)
>  					    dd->platform_config.data));
> -				goto bail; /* We don't trust this file now */
> +				goto bail_with_einval; /* We don't trust this file now */
>  			}
>  			pcfgcache->config_tables[table_type].table = ptr;
>  		} else {
> @@ -1856,7 +1856,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  					   __func__, table_type,
>  					   (ptr -
>  					    (u32 *)dd->platform_config.data));
> -				goto bail; /* We don't trust this file now */
> +				goto bail_with_einval; /* We don't trust this file now */
>  			}
>  			pcfgcache->config_tables[table_type].table_metadata =
>  									ptr;
> @@ -1873,8 +1873,7 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  			dd_dev_err(dd, "%s: Failed CRC check at offset %ld\n",
>  				   __func__, (ptr -
>  				   (u32 *)dd->platform_config.data));
> -			ret = -EINVAL;
> -			goto bail;
> +			goto bail_with_einval;
>  		}
>  		/* Jump the CRC DWORD */
>  		ptr++;
> @@ -1882,6 +1881,9 @@ int parse_platform_config(struct hfi1_devdata *dd)
>  
>  	pcfgcache->cache_valid = 1;
>  	return 0;
> +
> +bail_with_einval:
> +	ret = -EINVAL;
>  bail:
>  	memset(pcfgcache, 0, sizeof(struct platform_config_cache));
>  	return ret;
> -- 
> 1.8.3.1
> 

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 2/2] RDMA/srp: Fix error return code in srp_parse_options()

[wangyufen]

在 2022/11/26 20:02, Andy Shevchenko 写道:
> On Sat, Nov 26, 2022 at 11:35:04AM +0800, Wang Yufen wrote:
>> In the previous while loop, "ret" may be assigned zero, , so the error
>> return code may be incorrectly set to 0 instead of -EINVAL.
>> Add out_with_einval goto label and covert all "goto out;" to "goto
>> out_with_einval:" where it's appropriate, alse investigate each case
>> separately as Andy suggessted.
> 
> It's better now, though you missed something...
> 
> ...
> 
>>   		case SRP_OPT_TARGET_CAN_QUEUE:
>> -			if (match_int(args, &token) || token < 1) {
>> +			ret = match_int(args, &token);
> 
> Check for ret?

Yes, there's a ret check missing here, will change in v3

> 
>> +			if (token < 1) {
>>   				pr_warn("bad max target_can_queue parameter '%s'\n",
>>   					p);
>> -				goto out;
>> +				goto out_with_einval;
>>   			}
>>   			target->target_can_queue = token;
>>   			break;
> 
> ...
> 
>>   			target->scsi_host->can_queue);
> 
> The below can't be like this, right?

Yes, I'm sorry for the breakage, also will change in v3
Thanks!

> 
>> +out_with_einval:
>> +	ret = -EINVAL;
>>   out:
>>   	kfree(options);
>>   	return ret;
> 

Re: [PATCH v2 2/2] RDMA/srp: Fix error return code in srp_parse_options()

[wangyufen]

在 2022/11/26 20:03, Andy Shevchenko 写道:
> On Sat, Nov 26, 2022 at 02:02:14PM +0200, Andy Shevchenko wrote:
>> On Sat, Nov 26, 2022 at 11:35:04AM +0800, Wang Yufen wrote:
> 
> ...
> 
>>>   			target->scsi_host->can_queue);
>>
>> The below can't be like this, right?
>>
>>> +out_with_einval:
>>> +	ret = -EINVAL;
>>>   out:
>>>   	kfree(options);
>>>   	return ret;
> 
> One option is:
> 
> out:
> 	kfree(options);
> 	return ret;
> 
> out_with_einval:
> 	ret = -EINVAL;
> 	goto out;

I got it.
Thanks!

> 
>