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(parent: ebcfd56) | patch
ceph: check PG_Private flag before accessing page->private
authorYan, Zheng <zheng.z.yan@intel.com>
Mon, 28 May 2012 06:44:30 +0000 (14:44 +0800)
committerAlex Elder <elder@dreamhost.com>
Fri, 1 Jun 2012 13:06:29 +0000 (08:06 -0500)
commita7e58ed89292ac84c187114bb61efd4a7a650575
treeec4ea075748189c9be942fb41c70691d21b4d2dftree | snapshot
parentebcfd56b7a954918bc7d53e62fb913f81794f766commit | diff
ceph: check PG_Private flag before accessing page->private

I got lots of NULL pointer dereference Oops when compiling kernel on ceph.
The bug is because the kernel page migration routine replaces some pages
in the page cache with new pages, these new pages' private can be non-zero.

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>
fs/ceph/addr.c diff | blob | history
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