> No amount of carefulness will prevent vendors stick arbitrarily > damaging values of stack and mmap base randomisation, severely reducing > the usefullness of MAP_FIXED.
MAP_FIXED is useful still. The only safe way is to use addresses you got from mmap(), eg you overmap something. Anything else is madness, with or without randomization. The C library for example is free, and does, allocate memory and stacks etc etc. Same for many other libraries; in addition libraries change in size all the time... MAP_FIXED of an address you don't KNOW is free is a bug. Period. (using an address previously obtained from mmap() is safest, but you could in theory also parse /proc/self/maps, although that is racey, since nothing guarantees that the C library didn't spawn a background thread that allocates memory) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
