Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [RESEND v4 2/6] remoteproc: debugfs: Add ability to boot remote processor using debugfs | Date | Thu, 03 Dec 2015 22:12:59 +0100 |
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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.
Arnd
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