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From: Petr Tesarik <ptesarik@suse.cz>
To: Ivan Delalande <colona@arista.com>
Cc: "kexec@lists.infradead.org" <kexec@lists.infradead.org>
Subject: Re: [PATCH] makedumpfile: readpage_elf: handle 0-pages not stored in the ELF file
Date: Wed, 10 Feb 2016 08:52:40 +0100	[thread overview]
Message-ID: <20160210085240.22e8aafa@hananiah.suse.cz> (raw)
In-Reply-To: <20160210032118.GI382@ycc.fr>

On Wed, 10 Feb 2016 04:21:18 +0100
Ivan Delalande <colona@arista.com> wrote:

> Hi,
> 
> On Tue, Feb 09, 2016 at 09:31:50AM +0100, Petr Tesarik wrote:
>[...]
> > just a short status update. I haven't forgotten this patch, but I've
> > had some troubles reproducing the issue. To make sure I'm not on the
> > wrong track, what happened when you tried to dump dmesg on the affected
> > dump file without the patch?
> > 
> > For me, I crafted a dump file which causes a segfault. Did makedumpfile
> > also terminate on SIGSEGV? Did it report an error? Or did it just
> > produce wrong output?
> 
> Yeah, just a segfault, without any other message or output. It was
> coming from readpage_elf, at the call to memset in the `if (!offset1)`
> block, as it thinks it is handling one of this weird overlapping
> segments from ia64 and computes bad offsets.

Good. Then I was looking at the same bug, but fixed it differently.
Anyway, thank you very much for the original fix! It set me in the
right direction.

Petr T

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  reply	other threads:[~2016-02-10  7:53 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-22 23:35 [PATCH] makedumpfile: readpage_elf: handle 0-pages not stored in the ELF file Ivan Delalande
2016-01-27  2:21 ` Atsushi Kumagai
     [not found]   ` <20160127085821.3be424e1@hananiah.suse.cz>
2016-01-27  9:37     ` Petr Tesarik
2016-02-01  6:48       ` Atsushi Kumagai
2016-02-01 12:00         ` Petr Tesarik
2016-02-02  6:48           ` Atsushi Kumagai
2016-02-02  7:00             ` Ivan Delalande
2016-02-09  8:31               ` Petr Tesarik
2016-02-10  2:57                 ` Kexec on ARM? Rudici Cazeao
2016-02-10  3:21                 ` [PATCH] makedumpfile: readpage_elf: handle 0-pages not stored in the ELF file Ivan Delalande
2016-02-10  7:52                   ` Petr Tesarik [this message]
2016-02-10 18:06                 ` Kexec on ARM? Rudici Cazeao
2016-01-27 22:17   ` [PATCH v2] makedumpfile: readpage_elf: handle 0-pages not stored in the ELF file Ivan Delalande

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