From: Eric Dumazet <eduma...@google.com>
Date: Wed, 29 Aug 2018 11:50:12 -0700
> This reverts commit 71e41286203c017d24f041a7cd71abea7ca7b1e0.
>
> mmap()/munmap() can not be backed by kmalloced pages :
>
> We fault in :
>
> VM_BUG_ON_PAGE(PageSlab(page), page);
>
> unmap_single_vma+0x8a/0x110
> unmap_vmas+0x4b/0x90
> unmap_region+0xc9/0x140
> do_munmap+0x274/0x360
> vm_munmap+0x81/0xc0
> SyS_munmap+0x2b/0x40
> do_syscall_64+0x13e/0x1c0
> entry_SYSCALL_64_after_hwframe+0x42/0xb7
>
> Fixes: 71e41286203c ("packet: switch kvzalloc to allocate memory")
> Signed-off-by: Eric Dumazet <eduma...@google.com>
> Reported-by: John Sperbeck <jsperb...@google.com>
> Bisected-by: John Sperbeck <jsperb...@google.com>
Oops, applied, thanks Eric.
