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Date:   Mon, 19 Apr 2021 14:15:48 -0300
From:   Arnaldo Carvalho de Melo <acme@kernel.org>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     Dan Carpenter <dan.carpenter@oracle.com>,
        Muhammad Usama Anjum <musamaanjum@gmail.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Ingo Molnar <mingo@kernel.org>,
        Miroslav Benes <mbenes@suse.cz>, Borislav Petkov <bp@suse.de>,
        open list <linux-kernel@vger.kernel.org>,
        kernel-janitors@vger.kernel.org, colin.king@canonical.com
Subject: Re: [PATCH] objtool: prevent memory leak in error paths
Message-ID: <YH26xMfn04KATRow@kernel.org>
References: <20210413204511.GA664936@LEGION>
 <20210414084709.GT6021@kadam>
 <YHfqOVf1hGlbWjLP@hirez.programming.kicks-ass.net>
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Em Thu, Apr 15, 2021 at 09:24:41AM +0200, Peter Zijlstra escreveu:
> On Wed, Apr 14, 2021 at 11:47:09AM +0300, Dan Carpenter wrote:
> > On Wed, Apr 14, 2021 at 01:45:11AM +0500, Muhammad Usama Anjum wrote:
> > > Memory allocated by sym and sym->name isn't being freed if some error
> > > occurs in elf_create_undef_symbol(). Free the sym and sym->name if error
> > > is detected before returning NULL.
> > > 
> > > Addresses-Coverity: ("Prevent memory leak")
> > > Fixes: 2f2f7e47f052 ("objtool: Add elf_create_undef_symbol()")
> > > Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
> > > ---
> > > Only build has been tested.
> > > 
> > 
> > Just ignore leaks from the tools/ directory.  These things run and then
> > exit and all the memory is freed.  #OldSchoolGarbageCollector
> 
> Mostly true; but I suspect tools/perf might care, it has some longer
> running things in.

Yes, and now we have 'perf daemon' that is long running.

- Arnaldo