Kernel panic - not syncing: corrupted stack end detected inside scheduler

[Qian Cai]

Running LTP oom01 [1] test triggered kernel panic on an aarch64 server with the latest mainline (rc2).

[1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/mem/oom/oom01.c

[ 3433.338741] Kernel panic - not syncing: corrupted stack end detected inside scheduler
[ 3433.347644] CPU: 49 PID: 2189 Comm: in:imjournal Kdump: loaded Tainted: G        W         4.20.0-rc2+ #15
[ 3433.357298] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.50 06/01/2018
[ 3433.364523] Call trace:
[ 3433.366993]  dump_backtrace+0x0/0x2c8
[ 3433.370659]  show_stack+0x24/0x30
[ 3433.373980]  dump_stack+0x118/0x19c
[ 3433.377473]  panic+0x1b8/0x31c
[ 3433.380530]  schedule+0x0/0x240
[ 3433.383672]  schedule+0xdc/0x240
[ 3433.386905]  io_schedule+0x24/0x48
[ 3433.390313]  get_request+0x3b0/0xb68
[ 3433.393891]  blk_queue_bio+0x3a4/0xcd8
[ 3433.397642]  generic_make_request+0x440/0x7d8
[ 3433.402000]  submit_bio+0xbc/0x300
[ 3433.405409]  __swap_writepage+0xa54/0xd00
[ 3433.409420]  swap_writepage+0x44/0xb0
[ 3433.413086]  pageout.isra.12+0x580/0xd80
[ 3433.417011]  shrink_page_list+0x2480/0x36f0
[ 3433.421196]  shrink_inactive_list+0x388/0xb98
[ 3433.425555]  shrink_node_memcg+0x344/0x9c0
[ 3433.429653]  shrink_node+0x200/0x940
[ 3433.433231]  do_try_to_free_pages+0x234/0x7d0
[ 3433.437589]  try_to_free_pages+0x228/0x6b0
[ 3433.441689]  __alloc_pages_nodemask+0xcbc/0x2028
[ 3433.446309]  alloc_pages_vma+0x1a4/0x208
[ 3433.450235]  __read_swap_cache_async+0x4fc/0x858
[ 3433.454855]  read_swap_cache_async+0xa4/0x100
[ 3433.459214]  swap_cluster_readahead+0x598/0x650
[ 3433.463746]  shmem_swapin+0xd4/0x150
[ 3433.467324]  shmem_getpage_gfp+0xf50/0x1c48
[ 3433.471509]  shmem_fault+0x140/0x340
[ 3433.475086]  __do_fault+0xd0/0x440
[ 3433.478490]  do_fault+0x54c/0xf48
[ 3433.481807]  __handle_mm_fault+0x4c0/0x928
[ 3433.485905]  handle_mm_fault+0x30c/0x4b8
[ 3433.489832]  do_page_fault+0x294/0x658
[ 3433.493584]  do_translation_fault+0x98/0xa8
[ 3433.497769]  do_mem_abort+0x64/0xf0
[ 3433.501258]  el0_da+0x24/0x28