From: Jens Axboe <jens.axboe@oracle.com>
To: linux-btrace@vger.kernel.org
Subject: Re: blktrace segfault.
Date: Wed, 14 Nov 2007 09:45:30 +0000 [thread overview]
Message-ID: <20071114094530.GB26602@kernel.dk> (raw)
In-Reply-To: <4724673E.1090404@linux.vnet.ibm.com>
On Wed, Nov 14 2007, Jan Blunck wrote:
> On Sun, Oct 28, Aneesh Kumar K.V wrote:
>
> >
> > the below diff fix the same.
> >
> > diff --git a/blktrace.c b/blktrace.c
> > index 42613a7..4f4fcde 100644
> > --- a/blktrace.c
> > +++ b/blktrace.c
> > @@ -1220,6 +1220,7 @@ static int start_devices(void)
> > size = ncpus * sizeof(struct thread_information);
> > thread_information = malloc(size * ndevs);
> > + memset(thread_information, 0, size*ndevs);
> > if (!thread_information) {
> > fprintf(stderr, "Out of memory, threads (%d)\n", size * ndevs);
> > return 1;
>
> I'm pretty sure you want to make the memset after the NULL-pointer check. If
> malloc fails this is segfaulting too.
Ehm that's indeed a good point, I'll check in a fix for that.
--
Jens Axboe
next prev parent reply other threads:[~2007-11-14 9:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-28 10:53 blktrace segfault Aneesh Kumar K.V
2007-10-29 19:47 ` Jens Axboe
2007-11-14 9:39 ` Jan Blunck
2007-11-14 9:45 ` Jens Axboe [this message]
2007-11-14 9:51 ` Christoph Hellwig
2007-11-14 9:53 ` Jens Axboe
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