Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote processor using debugfs

From	Lee Jones <lee.jones@linaro.org>
Newsgroups	linux.kernel
Subject	Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote processor using debugfs
Date	2015-12-04 09:30 +0100
Message-ID	<qBTUD-dS-7@gated-at.bofh.it> (permalink)
References	<qylFL-9v-1@gated-at.bofh.it> <qBC7n-5Es-5@gated-at.bofh.it> <qBFRE-879-5@gated-at.bofh.it> <qBJsf-1YU-31@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Thu, 03 Dec 2015, Arnd Bergmann wrote:

> On Thursday 03 December 2015 17:28:30 Lee Jones wrote:
> > > 
> > > Ah, interesting. I haven't tried myself, and just tried to read the
> > > code. Maybe glibc already catches zero-length writes before it gets
> > > into the kernel, or I just missed the part of the syscall that checks
> > > for this.
> > 
> > Glibc is responsible indeed:
> >   
> >   http://osxr.org/glibc/source/io/write.c
> 
> Ok, so an attacker can force the stack overflow by calling
> syscall(__NR_write, fd, p, 0) if that has any potential value,
> but normal users won't hit this case.

Right.  I have fixed the issue (and another one I found) anyway, if
only to rid the GCC warning.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote  processor using debugfs Lee Jones <lee.jones@linaro.org> - 2015-12-03 13:30 +0100
  Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote processor using debugfs Arnd Bergmann <arnd@arndb.de> - 2015-12-03 13:50 +0100
    Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote  processor using debugfs Lee Jones <lee.jones@linaro.org> - 2015-12-03 14:10 +0100
      Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote processor using debugfs Arnd Bergmann <arnd@arndb.de> - 2015-12-03 14:30 +0100
        Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote  processor using debugfs Lee Jones <lee.jones@linaro.org> - 2015-12-03 18:30 +0100
          Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote processor using debugfs Arnd Bergmann <arnd@arndb.de> - 2015-12-03 22:20 +0100
            Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote  processor using debugfs Bjorn Andersson <bjorn@kryo.se> - 2015-12-03 22:30 +0100
            Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote  processor using debugfs Lee Jones <lee.jones@linaro.org> - 2015-12-04 09:30 +0100

csiph-web