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uprobes: Valid_vma() should reject VM_HUGETLB

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__replace_page() obviously can't work with the hugetlbfs
mappings, uprobe_register() will likely crash the kernel. Change
valid_vma() to check VM_HUGETLB as well.

As for PageTransHuge() no need to worry, vma->vm_file != NULL.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120615154322.GA9561@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Oleg Nesterov 2012-06-15 17:43:22 +02:00 committed by Ingo Molnar
parent e2b297fcf1
commit ea13137714
1 changed files with 2 additions and 1 deletions
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3
kernel/events/uprobes.c
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@ -99,7 +99,8 @@ static bool valid_vma(struct vm_area_struct *vma, bool is_register)
if (!is_register) if (!is_register)
return true; return true;
if ((vma->vm_flags & (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)) == (VM_READ|VM_EXEC)) if ((vma->vm_flags & (VM_HUGETLB|VM_READ|VM_WRITE|VM_EXEC|VM_SHARED))
== (VM_READ|VM_EXEC))
return true; return true;
return false; return false;