Messages in this thread Patch in this message | | | Date | Mon, 28 Jun 2021 11:22:20 +0200 | From | Peter Zijlstra <> | Subject | Re: [LKP] Re: [jump_label, x86] e7bf1ba97a: BUG:unable_to_handle_page_fault_for_address |
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On Thu, Jun 24, 2021 at 06:32:25AM +0000, Liu, Yujie wrote: > > > [ 222.094341] BUG: unable to handle page fault for address: > > > ffffffff83ccffe0 > > > > I *think* the below might help, can you try? > > Hi Peter Z, > > We try to apply the patch on commit e7bf1ba97afdd (jump_label, x86: Emit short JMP) > A new BUG appeared before reaching the BUG reported in previous mail. > Full dmesg in attachment.
> > @@ -555,6 +558,7 @@ static int __jump_label_mod_text_reserved(void *start, void *end) > > WARN_ON_ONCE(__module_text_address((unsigned long)end) != mod); > > if (!try_module_get(mod)) > > mod = NULL; > > + init = mod->state == MODULE_STATE_COMING; > > preempt_enable(); > > > > if (!mod)
*groan*, I'm an idiot... There's an obvious NULL pointer deref right there.
Let me try locally first before I send yet another dud.
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