Re: 2.5.52-mm1 kernel BUG at mm/page_walk.c:430!

Andrew Morton (akpm@digeo.com)
Tue, 17 Dec 2002 09:10:25 -0800


Helge Hafting wrote:
>
> X suddenly died, and was restarted. I found this in dmesg:
>
> kernel BUG at mm/page_walk.c:430!
> invalid operand: 0000
> CPU: 0
> EIP: 0060:[<c013beeb>] Not tainted
> EFLAGS: 00013246
> EIP is at make_pages_present+0x77/0xbc
> eax: d0efa344 ebx: 6b6b6b6b ecx: 000000a0 edx: c1604954
> esi: 6b6b6b6b edi: 00009000 ebp: d0efa344 esp: de555ef8
> ds: 0068 es: 0068 ss: 0068
> Process XFree86 (pid: 246, threadinfo=de554000 task=dfc00d80)
> Stack: 00000000 de9c35cc 00000001 d0efa344 6b6b6b6b d0efa344 de555f00
> dfc00d80
> c1604954 00009000 c013be64 00000000 c0136d78 6b6b6b6b 6b6b6b6b
> d0efa344
> de554000 000a0000 00009000 d0efa344 00000000 d0efa344 c1604954
> d0efa344
> Call Trace:
> [<c013be64>] gup_mk_present+0x0/0x10
> [<c0136d78>] move_vma+0x3d4/0x404
> [<c01370c8>] do_mremap+0x320/0x34c
> [<c0137142>] sys_mremap+0x4e/0x6f
> [<c0108973>] syscall_call+0x7/0xb
>

Seems to be just a bogus assertion. A shrinking, relocating mremap
against a VMA which has !MREMAP_MAYMOVE will call make_pages_present()
for zero pages.

You can remove mm:page_walk.c:430.

Thanks.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/