next-20171102: ARM64 dies on boot

From: Yury Norov
Date: Fri Nov 03 2017 - 00:18:33 EST

Hi all,

I reproduce it with qemu. The exact reason of panic in memory_present:
(gdb) bt
#0 0xffff000008dd8c6c in sparse_index_init (nid=<optimized at mm/sparse.c:80
#1 memory_present (nid=0, start=18446462598881083392, #2 0xffff000008dc518c in arm64_memory_present () #3 bootmem_init () at arch/arm64/mm/init.c:500
#4 0xffff000008dc28fc in setup_arch (cmdline_p=<optimized #5 0xffff000008dc083c in start_kernel () at init/main.c:5 #6 0x0000000000000000 in ?? ()

B+ â0xffff000008dd8c10 <memory_present> â0xffff000008dd8c14 <memory_present+4> and â0xffff000008dd8c18 <memory_present+8> mov â0xffff000008dd8c1c <memory_present+12> stp â0xffff000008dd8c20 <memory_present+16> mov â0xffff000008dd8c24 <memory_present+20> stp â0xffff000008dd8c28 <memory_present+24> lsl â0xffff000008dd8c2c <memory_present+28> stp â0xffff000008dd8c30 <memory_present+32> add â0xffff000008dd8c34 <memory_present+36> stp â0xffff000008dd8c38 <memory_present+40> orr â0xffff000008dd8c3c <memory_present+44> add â0xffff000008dd8c40 <memory_present+48> bl â0xffff000008dd8c44 <memory_present+52> ldr â0xffff000008dd8c48 <memory_present+56> adrp â0xffff000008dd8c4c <memory_present+60> sxtw â0xffff000008dd8c50 <memory_present+64> mov â0xffff000008dd8c54 <memory_present+68> ldr â0xffff000008dd8c58 <memory_present+72> cmp â0xffff000008dd8c5c <memory_present+76> b.ls â0xffff000008dd8c60 <memory_present+80> lsr â0xffff000008dd8c64 <memory_present+84> ldr â0xffff000008dd8c68 <memory_present+88> lsl >â0xffff000008dd8c6c <memory_present+92> ldr â0xffff000008dd8c70 <memory_present+96> cbnz â0xffff000008dd8c74 <memory_present+100> mov â0xffff000008dd8c78 <memory_present+104> bl â0xffff000008dd8c7c <memory_present+108> cbz â0xffff000008dd8c80 <memory_present+112> ldr â0xffff000008dd8c84 <memory_present+116> str â0xffff000008dd8c88 <memory_present+120> ldr â0xffff000008dd8c8c <memory_present+124> cbz â0xffff000008dd8c90 <memory_present+128> ldr â0xffff000008dd8c94 <memory_present+132> cbz â0xffff000008dd8c98 <memory_present+136> ubfx â0xffff000008dd8c9c <memory_present+140> add â0xffff000008dd8ca0 <memory_present+144> b â0xffff000008dd8ca4 <memory_present+148> mov â0xffff000008dd8ca8 <memory_present+152> ldr â0xffff000008dd8cac <memory_present+156> cbnz â0xffff000008dd8cb0 <memory_present+160> str â0xffff000008dd8cb4 <memory_present+164> mov â0xffff000008dd8cb8 <memory_present+168> bl â0xffff000008dd8cbc <memory_present+172> add â0xffff000008dd8cc0 <memory_present+176> ldr â0xffff000008dd8cc4 <memory_present+180> cmp â0xffff000008dd8cc8 <memory_present+184> b.le â0xffff000008dd8ccc <memory_present+188> str â0xffff000008dd8cd0 <memory_present+192> ldr â0xffff000008dd8cd4 <memory_present+196> orr â0xffff000008dd8cd8 <memory_present+200> str â0xffff000008dd8cdc <memory_present+204> add â0xffff000008dd8ce0 <memory_present+208> b â0xffff000008dd8ce4 <memory_present+212> ldp â0xffff000008dd8ce8 <memory_present+216> ldp â0xffff000008dd8cec <memory_present+220> ldp â0xffff000008dd8cf0 <memory_present+224> ldp â0xffff000008dd8cf4 <memory_present+228> ret
This is very early stage, so there's no messages Config is attached. If no ideas, I can bisect it
Yury

Attachment: config.next.gzDescription: application/gzip Stafford Horne: "[PATCH for-next] openrisc: fix possible deadlock scenario during timer sync" Madhavan Srinivasan: "Re: [PATCH] powerpc/perf: Fix core-imc hotplug callback failure during imc initialization" Sudeep Holla: "Re: next-20171102: ARM64 dies on boot" date ] [ thread ] [ subject ] [ author ] is the NULL-dereference
out>, section_nr=<optimized out>)
end=0) at mm/sparse.c:215
at arch/arm64/mm/init.c:307
out>) at arch/arm64/kernel/setup.c:287
30
stp x29, x30, [sp, #-80]! â
x1, x1, #0xfffffffffffc0000 â
x29, sp â
x23, x24, [sp, #48] â
w23, w0 â
x19, x20, [sp, #16] â
w20, w23, #3 â
x21, x22, [sp, #32] â
x0, x29, #0x48 â
x2, x1, [x29, #64] â
w20, w20, #0x4 â
x1, x29, #0x40 â
0xffff000008e16a1c <mminit_validate_memmodel_limitsâ
x21, [x29, #72] â
x22, 0xffff000009023000 <preferred_node_policy+8> â
x20, w20 â
x24, x22 â
x0, [x29, #64] â
x0, x21 â
0xffff000008dd8ce4 <memory_present+212> // b.plastâ
x19, x21, #26 â
x0, [x22, #96] â
x19, x19, #3 â
x0, [x0, x19] | <<<<<< HERE
x0, 0xffff000008dd8c88 <memory_present+120> â
w0, w23 â
0xffff0000089824e4 <sparse_index_alloc> â
x0, 0xffff000008dd8c88 <memory_present+120> â
x1, [x22, #96] â
x0, [x1, x19] â
x0, [x24, #96] â
x0, 0xffff000008dd8ca4 <memory_present+148> â
x5, [x0, x19] â
x5, 0xffff000008dd8ca8 <memory_present+152> â
x0, x21, #18, #8 â
x5, x5, x0, lsl #4 â
0xffff000008dd8ca8 <memory_present+152> â
x5, #0x0 // #0 â
x0, [x5] â
x0, 0xffff000008dd8cdc <memory_present+204> â
x20, [x5] â
x0, x5 â
0xffff0000081e4670 <__section_nr> â
x1, x24, #0x60 â
w2, [x1, #8] â
w0, w2 â
0xffff000008dd8cd0 <memory_present+192> â
w0, [x1, #8] â
x0, [x5] â
x0, x0, #0x1 â
x0, [x5] â
x21, x21, #0x40, lsl #12 â
0xffff000008dd8c54 <memory_present+68> â
x19, x20, [sp, #16] â
x21, x22, [sp, #32] â
x23, x24, [sp, #48] â
x29, x30, [sp], #80 â
|
in console.
later.
>

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