Yves-Alexis Perez wrote in > <6771f9536d49185fc8f1ea9905c13cf4dd8776d2.ca...@debian.org>: > ... > |mmap(NULL, 2097152, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 0, 0) = 0xf7df\ > |3000
On Jul 10, 2024, at 5:44 PM, Steffen Nurpmeso <stef...@sdaoden.eu> wrote: > I thought on Linux MAP_DENYWRITE is actually an ignored flag. I believe you're correct, but I believe what Yves-Alexis Perez is showing is the flags that are being *passed* to the kernel (whether or not they DO anything). Which is why there's a proposal to *make* MAP_DENYWRITE do something in this case. My plea is that if this DOES start doing something, PLEASE document that ASAP (including a note that it USED to be ignored). I fear that this security property might, on some platforms, depend on a quiet undocumented change. --- David A. Wheeler
