On Sat, Jul 15, 2017 at 08:29:57AM +0200, Mike Galbraith wrote: > On Sat, 2017-07-15 at 00:10 -0500, Josh Poimboeuf wrote: > > > > The bug table was made writable for vmlinux, which relies on > > vmlinux.lds.S and vmlinux.lds.h for laying out the sections. However, > > it wasn't made writable for modules, which rely on the ELF section > > header flags. > > It seems vmlinux sort of relies on your fix too. objdump did show > vmlinux __bug_table as being READONLY, but that (lie) is now gone.
Yeah, those ELF bits are ignored by the kernel. It sets its own protections during boot, e.g. mark_rodata_ro(). -- Josh
