linux-hardening - Re: [PATCH] IB/hfi1: replace deprecated strncpy

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Message-Id: <169537858725.3339131.15264681410291677148.b4-ty@kernel.org>
Date: Fri, 22 Sep 2023 13:29:47 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
 Jason Gunthorpe <jgg@...pe.ca>, Justin Stitt <justinstitt@...gle.com>
Cc: linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH] IB/hfi1: replace deprecated strncpy


On Thu, 21 Sep 2023 07:17:47 +0000, Justin Stitt wrote:
> `strncpy` is deprecated for use on NUL-terminated destination strings
> [1] and as such we should prefer more robust and less ambiguous string
> interfaces.
> 
> We see that `buf` is expected to be NUL-terminated based on it's use
> within a trace event wherein `is_misc_err_name` and `is_various_name`
> map to `is_name` through `is_table`:
> | TRACE_EVENT(hfi1_interrupt,
> | 	    TP_PROTO(struct hfi1_devdata *dd, const struct is_table *is_entry,
> | 		     int src),
> | 	    TP_ARGS(dd, is_entry, src),
> | 	    TP_STRUCT__entry(DD_DEV_ENTRY(dd)
> | 			     __array(char, buf, 64)
> | 			     __field(int, src)
> | 			     ),
> | 	    TP_fast_assign(DD_DEV_ASSIGN(dd);
> | 			   is_entry->is_name(__entry->buf, 64,
> | 					     src - is_entry->start);
> | 			   __entry->src = src;
> | 			   ),
> | 	    TP_printk("[%s] source: %s [%d]", __get_str(dev), __entry->buf,
> | 		      __entry->src)
> | );
> 
> [...]

Applied, thanks!

[1/1] IB/hfi1: replace deprecated strncpy
      https://git.kernel.org/rdma/rdma/c/c2d0c5b28a77d5

Best regards,
-- 
Leon Romanovsky <leon@...nel.org>