On Sun, Nov 4, 2012 at 8:44 PM, Michel Lespinasse <walken@xxxxxxxxxx> wrote: > On Sun, Nov 4, 2012 at 8:14 PM, Bob Liu <lliubbo@xxxxxxxxx> wrote: >> Hmm, I attached a simple fix patch. > > Reviewed-by: Michel Lespinasse <walken@xxxxxxxxxx> > (also ran some tests with it, but I could never reproduce the original > issue anyway). Wait a minute, this is actually wrong. You need to call vma_lock_anon_vma() / vma_unlock_anon_vma() to avoid the issue with vma->anon_vma == NULL. I'll fix it and integrate it into my next patch series, which I intend to send later today. (I am adding new code into validate_mm(), so that it's easier to have it in the same patch series to avoid merge conflicts) -- Michel "Walken" Lespinasse A program is never fully debugged until the last user dies. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>