mm/mempolicy.c: check return code of check_range
Function check_range may return ERR_PTR(...). Check for it. Signed-off-by: Vasiliy Kulikov <segooon@gmail.com> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Christoph Lameter <cl@linux.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -924,12 +924,15 @@ static int migrate_to_node(struct mm_struct *mm, int source, int dest,
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nodemask_t nmask;
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nodemask_t nmask;
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LIST_HEAD(pagelist);
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LIST_HEAD(pagelist);
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int err = 0;
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int err = 0;
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struct vm_area_struct *vma;
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nodes_clear(nmask);
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nodes_clear(nmask);
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node_set(source, nmask);
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node_set(source, nmask);
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check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask,
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vma = check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask,
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flags | MPOL_MF_DISCONTIG_OK, &pagelist);
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flags | MPOL_MF_DISCONTIG_OK, &pagelist);
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if (IS_ERR(vma))
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return PTR_ERR(vma);
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if (!list_empty(&pagelist)) {
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if (!list_empty(&pagelist)) {
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err = migrate_pages(&pagelist, new_node_page, dest, 0);
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err = migrate_pages(&pagelist, new_node_page, dest, 0);
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