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 ?? ()
B+ │0xffff000008dd8c10 <memory_present> stp x29, x30, [sp, #-80]! │
│0xffff000008dd8c14 <memory_present+4> and x1, x1, #0xfffffffffffc0000 │
│0xffff000008dd8c18 <memory_present+8> mov x29, sp │
│0xffff000008dd8c1c <memory_present+12> stp x23, x24, [sp, #48] │
│0xffff000008dd8c20 <memory_present+16> mov w23, w0 │
│0xffff000008dd8c24 <memory_present+20> stp x19, x20, [sp, #16] │
│0xffff000008dd8c28 <memory_present+24> lsl w20, w23, #3 │
│0xffff000008dd8c2c <memory_present+28> stp x21, x22, [sp, #32] │
│0xffff000008dd8c30 <memory_present+32> add x0, x29, #0x48 │
│0xffff000008dd8c34 <memory_present+36> stp x2, x1, [x29, #64] │
│0xffff000008dd8c38 <memory_present+40> orr w20, w20, #0x4 │
│0xffff000008dd8c3c <memory_present+44> add x1, x29, #0x40 │
│0xffff000008dd8c40 <memory_present+48> bl 0xffff000008e16a1c <mminit_validate_memmodel_limits│
│0xffff000008dd8c44 <memory_present+52> ldr x21, [x29, #72] │
│0xffff000008dd8c48 <memory_present+56> adrp x22, 0xffff000009023000 <preferred_node_policy+8> │
│0xffff000008dd8c4c <memory_present+60> sxtw x20, w20 │
│0xffff000008dd8c50 <memory_present+64> mov x24, x22 │
│0xffff000008dd8c54 <memory_present+68> ldr x0, [x29, #64] │
│0xffff000008dd8c58 <memory_present+72> cmp x0, x21 │
│0xffff000008dd8c5c <memory_present+76> b.ls 0xffff000008dd8ce4 <memory_present+212> // b.plast│
│0xffff000008dd8c60 <memory_present+80> lsr x19, x21, #26 │
│0xffff000008dd8c64 <memory_present+84> ldr x0, [x22, #96] │
│0xffff000008dd8c68 <memory_present+88> lsl x19, x19, #3 │
>│0xffff000008dd8c6c <memory_present+92> ldr x0, [x0, x19] | <<<<<< HERE
│0xffff000008dd8c70 <memory_present+96> cbnz x0, 0xffff000008dd8c88 <memory_present+120> │
│0xffff000008dd8c74 <memory_present+100> mov w0, w23 │
│0xffff000008dd8c78 <memory_present+104> bl 0xffff0000089824e4 <sparse_index_alloc> │
│0xffff000008dd8c7c <memory_present+108> cbz x0, 0xffff000008dd8c88 <memory_present+120> │
│0xffff000008dd8c80 <memory_present+112> ldr x1, [x22, #96] │
│0xffff000008dd8c84 <memory_present+116> str x0, [x1, x19] │
│0xffff000008dd8c88 <memory_present+120> ldr x0, [x24, #96] │
│0xffff000008dd8c8c <memory_present+124> cbz x0, 0xffff000008dd8ca4 <memory_present+148> │
│0xffff000008dd8c90 <memory_present+128> ldr x5, [x0, x19] │
│0xffff000008dd8c94 <memory_present+132> cbz x5, 0xffff000008dd8ca8 <memory_present+152> │
│0xffff000008dd8c98 <memory_present+136> ubfx x0, x21, #18, #8 │
│0xffff000008dd8c9c <memory_present+140> add x5, x5, x0, lsl #4 │
│0xffff000008dd8ca0 <memory_present+144> b 0xffff000008dd8ca8 <memory_present+152> │
│0xffff000008dd8ca4 <memory_present+148> mov x5, #0x0 // #0 │
│0xffff000008dd8ca8 <memory_present+152> ldr x0, [x5] │
│0xffff000008dd8cac <memory_present+156> cbnz x0, 0xffff000008dd8cdc <memory_present+204> │
│0xffff000008dd8cb0 <memory_present+160> str x20, [x5] │
│0xffff000008dd8cb4 <memory_present+164> mov x0, x5 │
│0xffff000008dd8cb8 <memory_present+168> bl 0xffff0000081e4670 <__section_nr> │
│0xffff000008dd8cbc <memory_present+172> add x1, x24, #0x60 │
│0xffff000008dd8cc0 <memory_present+176> ldr w2, [x1, #8] │
│0xffff000008dd8cc4 <memory_present+180> cmp w0, w2 │
│0xffff000008dd8cc8 <memory_present+184> b.le 0xffff000008dd8cd0 <memory_present+192> │
│0xffff000008dd8ccc <memory_present+188> str w0, [x1, #8] │
│0xffff000008dd8cd0 <memory_present+192> ldr x0, [x5] │
│0xffff000008dd8cd4 <memory_present+196> orr x0, x0, #0x1 │
│0xffff000008dd8cd8 <memory_present+200> str x0, [x5] │
│0xffff000008dd8cdc <memory_present+204> add x21, x21, #0x40, lsl #12 │
│0xffff000008dd8ce0 <memory_present+208> b 0xffff000008dd8c54 <memory_present+68> │
│0xffff000008dd8ce4 <memory_present+212> ldp x19, x20, [sp, #16] │
│0xffff000008dd8ce8 <memory_present+216> ldp x21, x22, [sp, #32] │
│0xffff000008dd8cec <memory_present+220> ldp x23, x24, [sp, #48] │
│0xffff000008dd8cf0 <memory_present+224> ldp x29, x30, [sp], #80 │
│0xffff000008dd8cf4 <memory_present+228> ret |
This is very early stage, so there's no messages in console.
Config is attached. If no ideas, I can bisect it later.
Yury