On 03/11/17 04:18, Yury Norov wrote: > Hi all, > > I reproduce it with qemu. The exact reason of panic is the NULL-dereference > in memory_present: > (gdb) bt > #0 0xffff000008dd8c6c in sparse_index_init (nid=<optimized out>, > section_nr=<optimized out>) > at mm/sparse.c:80 > #1 memory_present (nid=0, start=18446462598881083392, end=0) at > mm/sparse.c:215 > #2 0xffff000008dc518c in arm64_memory_present () at arch/arm64/mm/init.c:307 > #3 bootmem_init () at arch/arm64/mm/init.c:500 > #4 0xffff000008dc28fc in setup_arch (cmdline_p=<optimized out>) at > arch/arm64/kernel/setup.c:287 > #5 0xffff000008dc083c in start_kernel () at init/main.c:530 > #6 0x0000000000000000 in ?? () >
[...] > This is very early stage, so there's no messages in console. > Config is attached. If no ideas, I can bisect it later. > Reported and fixed[1], may be not in -next yet. -- Regards, Sudeep [1] https://marc.info/?l=linux-kernel&m=150962592016250&w=2