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From: "Carrillo, Erik G" <erik.g.carrillo@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "thomas@monjalon.net" <thomas@monjalon.net>,
	"dev@dpdk.org" <dev@dpdk.org>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 1/2] timer: fix null pointer dereference
Date: Mon, 15 Jul 2019 16:04:11 +0000	[thread overview]
Message-ID: <BE54F058557D9A4FAC1D84E2FC6D8757267EB325@fmsmsx117.amr.corp.intel.com> (raw)
In-Reply-To: <20190715084841.4f6baebf@hermes.lan>

Hi Stephen,

> -----Original Message-----
> From: Stephen Hemminger <stephen@networkplumber.org>
> Sent: Monday, July 15, 2019 10:49 AM
> To: Carrillo, Erik G <erik.g.carrillo@intel.com>
> Cc: thomas@monjalon.net; dev@dpdk.org; stable@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH 1/2] timer: fix null pointer dereference
> 
> On Mon, 15 Jul 2019 10:39:31 -0500
> Erik Gabriel Carrillo <erik.g.carrillo@intel.com> wrote:
> 
> > If the timer subsystem is not initialized before rte_timer_manage (for
> > example) is invoked, a pointer to a shared hugepage memory region will
> > still be null and dereferenced when it is checked for validity; handle
> > this case.
> >
> > Fixes: c0749f7096c7 ("timer: allow management in shared memory")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
> 
> I have mixed feelings about this patch.
> Any calls to rte_timer before rte_timer_subsystem_init is not a valid usage.
> Better to kill the application.

Ok, that sounds like a better approach.  I'll update the patch and resubmit.

Thanks,
Erik

  reply	other threads:[~2019-07-15 16:04 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-15 15:39 [dpdk-dev] [PATCH 0/2] fix segfault seen with performance-thread example Erik Gabriel Carrillo
2019-07-15 15:39 ` [dpdk-dev] [PATCH 1/2] timer: fix null pointer dereference Erik Gabriel Carrillo
2019-07-15 15:48   ` Stephen Hemminger
2019-07-15 16:04     ` Carrillo, Erik G [this message]
2019-07-15 19:48       ` Carrillo, Erik G
2019-07-16  8:31         ` Bruce Richardson
2019-07-16 14:58           ` Carrillo, Erik G
2019-07-15 15:39 ` [dpdk-dev] [PATCH 2/2] examples/performance-thread: init timer subsystem Erik Gabriel Carrillo
2019-07-18 21:20 ` [dpdk-dev] [PATCH 0/2] fix segfault seen with performance-thread example Thomas Monjalon

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