Commits
Andrey Ryabinin committed 0d39e2669d7
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.ye@intel.com> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Dmitry Vyukov <dvyukov@google.com> Cc: kasan-dev@googlegroups.com Cc: Alexander Potapenko <glider@google.com> Cc: lkp@01.org Link: https://lkml.kernel.org/r/20180110153602.18919-1-aryabinin@virtuozzo.com