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authorYan, Zheng <zheng.z.yan@intel.com>2012-05-28 14:44:30 +0800
committerAlex Elder <elder@dreamhost.com>2012-06-01 08:06:29 -0500
commit28c0254ede13ab575d2df5c6585ed3d4817c3e6b (patch)
treeec4ea075748189c9be942fb41c70691d21b4d2df /fs/befs
parent6bd9adbdf9ca6a052b0b7455ac67b925eb38cfad (diff)
downloadlinux-28c0254ede13ab575d2df5c6585ed3d4817c3e6b.tar.bz2
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>
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