linux-kernel - Re: [PATCH v3 2/2] RDMA/srp: Fix error return code in srp_parse

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Message-ID: <Y4SiaoUl1PMWDMcG@unreal>
Date:   Mon, 28 Nov 2022 13:58:34 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Wang Yufen <wangyufen@...wei.com>
Cc:     bvanassche@....org, jgg@...pe.ca,
        dennis.dalessandro@...nelisnetworks.com,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        andriy.shevchenko@...ux.intel.com, bart.vanassche@....com,
        easwar.hariharan@...el.com
Subject: Re: [PATCH v3 2/2] RDMA/srp: Fix error return code in
 srp_parse_options()

On Sat, Nov 26, 2022 at 09:50:54PM +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.
> 
> 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@...wei.com>
> ---
>  drivers/infiniband/ulp/srp/ib_srp.c | 86 ++++++++++++++++++++++++++-----------
>  1 file changed, 60 insertions(+), 26 deletions(-)

<...>

> @@ -3623,6 +3653,10 @@ static int srp_parse_options(struct net *net, const char *buf,
>  out:
>  	kfree(options);
>  	return ret;
> +
> +out_with_einval:

It needs to be changed back.

Thanks

> +	ret = -EINVAL;
> +	goto out;
>  }
>  
>  static ssize_t add_target_store(struct device *dev,
> -- 
> 1.8.3.1
>