diff options
| author | Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp> | 2008-10-20 13:51:52 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-28 16:48:24 +0100 |
| commit | e7706fc691513b0f06adb3de3d6ac04293180146 (patch) | |
| tree | 06a8ace4426f38ec9015373d6f3b08abd6a57456 /ipc | |
| parent | 1281675e9c0d4d42d993697f4daab45ef22d49da (diff) | |
x86, kdump: fix invalid access on i386 sparsemem
Impact: fix kdump crash on 32-bit sparsemem kernels
Since linux-2.6.27, kdump has failed on i386 sparsemem kernel.
1st-kernel gets a panic just before switching to 2nd-kernel.
The cause is that a kernel accesses invalid mem_section by
page_to_pfn(image->swap_page) at machine_kexec().
image->swap_page is allocated if kexec for hibernation, but
it is not allocated if kdump. So if kdump, a kernel should
not access the mem_section corresponding to image->swap_page.
The attached patch fixes this invalid access.
Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: kexec-ml <kexec@lists.infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions