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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
