Revision 6b7339f4c31ad69c8e9c0b2859276e22cf72176d authored by Kirill A. Shutemov on 06 July 2015, 20:18:37 UTC, committed by Linus Torvalds on 09 July 2015, 18:12:48 UTC
Reading page fault handler code I've noticed that under right circumstances kernel would map anonymous pages into file mappings: if the VMA doesn't have vm_ops->fault() and the VMA wasn't fully populated on ->mmap(), kernel would handle page fault to not populated pte with do_anonymous_page(). Let's change page fault handler to use do_anonymous_page() only on anonymous VMA (->vm_ops == NULL) and make sure that the VMA is not shared. For file mappings without vm_ops->fault() or shred VMA without vm_ops, page fault on pte_none() entry would lead to SIGBUS. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Willy Tarreau <w@1wt.eu> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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| File | Mode | Size |
|---|---|---|
| bnx2-mips-06-6.2.1.fw.ihex | -rw-r--r-- | 249.6 KB |
| bnx2-mips-09-6.2.1a.fw.ihex | -rw-r--r-- | 279.4 KB |
| bnx2-rv2p-06-6.0.15.fw.ihex | -rw-r--r-- | 15.6 KB |
| bnx2-rv2p-09-6.0.17.fw.ihex | -rw-r--r-- | 16.7 KB |
| bnx2-rv2p-09ax-6.0.17.fw.ihex | -rw-r--r-- | 18.1 KB |
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