• Aneesh Kumar K.V's avatar
    powerpc/mm: Fix kernel crash on page table free · 667416f3
    Aneesh Kumar K.V authored
    Fix the below crash on Book3E 64. pgtable_page_dtor expects struct
    page *arg.
    
    Also call the destructor on non book3s platforms correctly. This frees
    up the split PTL locks correctly if we had allocated them before.
    
    Call Trace:
      .kmem_cache_free+0x9c/0x44c (unreliable)
      .ptlock_free+0x1c/0x30
      .tlb_remove_table+0xdc/0x224
      .free_pgd_range+0x298/0x500
      .shift_arg_pages+0x10c/0x1e0
      .setup_arg_pages+0x200/0x25c
      .load_elf_binary+0x450/0x16c8
      .search_binary_handler.part.11+0x9c/0x248
      .do_execveat_common.isra.13+0x868/0xc18
      .run_init_process+0x34/0x4c
      .try_to_run_init_process+0x1c/0x68
      .kernel_init+0xdc/0x130
      .ret_from_kernel_thread+0x58/0x7c
    
    Fixes: 70234676 ("powerpc/mm/nohash: Remove pte fragment dependency from nohash")
    Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    667416f3
pgalloc.h 4.88 KB