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| author | Michel Lespinasse <walken@google.com> | 2012-10-09 01:31:48 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 09:22:42 +0200 |
| commit | 523d4e2008fd4a68b1a164e63e8c75b7b20f07e0 (patch) | |
| tree | c51d7fe7c6c614cf4cf8ef09f923a502cc18d279 /mm/mmap.c | |
| parent | mm: add CONFIG_DEBUG_VM_RB build option (diff) | |
| download | linux-523d4e2008fd4a68b1a164e63e8c75b7b20f07e0.tar.xz linux-523d4e2008fd4a68b1a164e63e8c75b7b20f07e0.zip | |
mm anon rmap: in mremap, set the new vma's position before anon_vma_clone()
anon_vma_clone() expects new_vma->vm_{start,end,pgoff} to be correctly set
so that the new vma can be indexed on the anon interval tree.
copy_vma() was failing to do that, which broke mremap().
Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Tested-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index deb422c39e21..81248992120d 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2419,16 +2419,16 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, new_vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL); if (new_vma) { *new_vma = *vma; + new_vma->vm_start = addr; + new_vma->vm_end = addr + len; + new_vma->vm_pgoff = pgoff; pol = mpol_dup(vma_policy(vma)); if (IS_ERR(pol)) goto out_free_vma; + vma_set_policy(new_vma, pol); INIT_LIST_HEAD(&new_vma->anon_vma_chain); if (anon_vma_clone(new_vma, vma)) goto out_free_mempol; - vma_set_policy(new_vma, pol); - new_vma->vm_start = addr; - new_vma->vm_end = addr + len; - new_vma->vm_pgoff = pgoff; if (new_vma->vm_file) get_file(new_vma->vm_file); if (new_vma->vm_ops && new_vma->vm_ops->open) |