On Sun, 14 Jan 2018, Ingo Molnar wrote: > > * tip-bot for Andrey Ryabinin <tip...@zytor.com> wrote: > > > Commit-ID: 74b61d1fb59bed3a6608161b05f2c0f5cb71acf6 > > Gitweb: > > https://git.kernel.org/tip/74b61d1fb59bed3a6608161b05f2c0f5cb71acf6 > > Author: Andrey Ryabinin <aryabi...@virtuozzo.com> > > AuthorDate: Wed, 10 Jan 2018 18:36:02 +0300 > > Committer: Thomas Gleixner <t...@linutronix.de> > > CommitDate: Sun, 14 Jan 2018 12:59:51 +0100 > > > > x86/kasan: Panic if there is not enough memory to boot > > > > Currently KASAN doesn't panic in case it don't have enough memory > > to boot. Instead, it crashes in some random place: > > > > kernel BUG at arch/x86/mm/physaddr.c:27! > > > > RIP: 0010:__phys_addr+0x268/0x276 > > Call Trace: > > kasan_populate_shadow+0x3f2/0x497 > > kasan_init+0x12e/0x2b2 > > setup_arch+0x2825/0x2a2c > > start_kernel+0xc8/0x15f4 > > x86_64_start_reservations+0x2a/0x2c > > x86_64_start_kernel+0x72/0x75 > > secondary_startup_64+0xa5/0xb0 > > > > Use memblock_virt_alloc_try_nid() for allocations without failure > > fallback. It will panic with an out of memory message. > > > > Reported-by: kernel test robot <xiaolong...@intel.com> > > Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> > > Signed-off-by: Thomas Gleixner <t...@linutronix.de> > > Acked-by: Dmitry Vyukov <dvyu...@google.com> > > Cc: kasan-...@googlegroups.com > > Cc: Alexander Potapenko <gli...@google.com> > > Cc: l...@01.org > > Link: > > https://lkml.kernel.org/r/20180110153602.18919-1-aryabi...@virtuozzo.com > > I think this commit should be in tip:x86/pti for dependency reasons, to get > backported automatically. I suspect we want the same KASAN robustness in > -stable. > > If this patch is too high risk and should be in x86/mm, then it should still > be > x86/pti based, to allow later merging into x86/pti. > > The latest already-upstream commit of x86/pti is de791821c295, and this > commit > applies cleanly to that base.
makes sense. I'll move it to x86/pti ...
