On 2016-12-15 19:09, Nikolay Borisov wrote: > Hello, > > I was doing some kasan-related debugging and when I enabled it I started > getting warnings for large stackframes. So CONFIG_FRAME_WARN has : > > int "Warn for stack frames larger than (needs gcc 4.4)" > range 0 8192 > default 0 if KASAN > default 2048 if GCC_PLUGIN_LATENT_ENTROPY > default 1024 if !64BIT > default 2048 if 64BIT > > This means that frame_warns should effectively be disabled when kasan is > enabled. However in my case this is not the situation. > http://sprunge.us/FiGf here is the config file. It does have > CONFIG_KASAN=y and CONFIG_FRAME_WARN=1024 . And even this is erroneous > since it's a 64bit kernel, so it should be 2k. I haven't manually set > the limit to 1k either.
I guess the problem is that it's an option with a propt, so deviating from the default value is legitimate. And most likely the value is computed during menuconfig startup and a subsequent change of CONFIG_KASAN does not change it (because 2048 or 1048 are also valid). Michal
