linux-kernel - Re: [PATCH v3] perf tools: Fix build-id matching on vmlinux

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Mon, 22 Sep 2014 16:31:49 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <andi@...stfloor.org>, stable@...r.kernel.org
Subject: Re: [PATCH v3] perf tools: Fix build-id matching on vmlinux

Hi Ingo,

On Mon, 22 Sep 2014 07:16:30 +0200, Ingo Molnar wrote:
> * Namhyung Kim <namhyung@...nel.org> wrote:
>> +		list_for_each_entry(dso, &machine->kernel_dsos, node) {
>> +			const char *suffix;
>> +
>> +			suffix = dso->long_name + strlen(dso->long_name) - 3;
>> +			if (strcmp(suffix, ".ko")) {
>> +				kernel = dso;
>> +				break;
>> +			}
>
> Is strlen(dso->long_name) guaranteed to be >= 3? If not then you 
> should probably check for it, otherwise we might strcmp into 
> invalid memory.

I *think* they are all valid kernel modules so length should be greater
than 3.  But I also think that adding such an extra check won't cause
any harm.  So I'll change to check it in v4. :)

Thanks for your review!
Namhyung
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/