linux-kernel - Re: [GIT PULL] tracing: Fixes for v6.17

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Message-ID: <20250822212311.GA1629566@ax162>
Date: Fri, 22 Aug 2025 14:23:11 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Mark Rutland <mark.rutland@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Liao Yuanhong <liaoyuanhong@...o.com>,
	Pu Lehui <pulehui@...wei.com>, Tao Chen <chen.dylane@...ux.dev>,
	Tengda Wu <wutengda@...weicloud.com>,
	Ye Weihua <yeweihua4@...wei.com>
Subject: Re: [GIT PULL] tracing: Fixes for v6.17

On Fri, Aug 22, 2025 at 05:16:37PM -0400, Steven Rostedt wrote:
> On Fri, 22 Aug 2025 17:08:08 -0400
> Steven Rostedt <rostedt@...dmis.org> wrote:
> 
> > > 
> > > If there is any other information I can provide or patches I can test, I
> > > am happy to do so.  
> > 
> > Can you send me your .config file?
> 
> Actually, can you see if this fixes the bug you are seeing?

Yes, it does.

Tested-by: Nathan Chancellor <nathan@...nel.org>

> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index f992a5eb878e..2b570e057ba3 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -4662,7 +4662,8 @@ ftrace_regex_open(struct ftrace_ops *ops, int flag,
>  			iter->hash = alloc_and_copy_ftrace_hash(size_bits, hash);
>  		}
>  	} else {
> -		iter->hash = alloc_and_copy_ftrace_hash(hash->size_bits, hash);
> +		if (hash)
> +			iter->hash = alloc_and_copy_ftrace_hash(hash->size_bits, hash);
>  	}
>  
>  	if (!iter->hash) {
> 
> 
> -- Steve