Re: CVS commit: src/sys/arch

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Fri, Sep 16, 2016 at 11:48:10AM +0000, Maxime Villard wrote:
> Module Name:	src
> Committed By:	maxv
> Date:		Fri Sep 16 11:48:10 UTC 2016
> 
> Modified Files:
> 	src/sys/arch/amd64/amd64: trap.c
> 	src/sys/arch/i386/i386: trap.c
> 
> Log Message:
> Put two KASSERTs, to make sure the fault is happening in the correct
> half of the vm space when using special copy functions. It can detect
> bugs where the kernel would fault when copying a kernel buffer which
> it wrongly believes comes from userland.

Hello,
i386/Xen now panics, maybe because of this commit:
http://www-soc.lip6.fr/~bouyer/NetBSD-tests/xen/HEAD/i386/201609171110Z_anita.txt

kernel/t_kauth_pr_47598 (75/660): 1 test cases
    kauth_curtain: panic: kernel diagnostic assertion "onfault == kcopy_fault || rcr2() < VM_MAXUSER_ADDRESS" failed: file "/usr/src/sys/arch/i386/i386/trap.c", line 358 
cpu2: Begin traceback...
?(c055cc10,cddcec74,cddcecf8,c010bd8e,c055cc10,c055cb52,c055d32c,c055d250,166,c01157a4) at c0429e3d
uvm_fault(0xc18a335c, 0x53e58000, 1) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 0 eip c0110d35 cs 9 eflags 10246 cr2 53e58955 ilevel 8 esp cddce734
curlwp 0xc19bb2a0 pid 10874 lid 1 lowest kstack 0xcddcc2c0
Skipping crash dump on recursive panic
panic: trap
Faulted in mid-traceback; aborting...
rebooting...


Any idea ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--