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    SubjectRe: [XFS on bad superblock] BUG: unable to handle kernel NULL pointer dereference at 00000003
    On Thu, Oct 10, 2013 at 11:33:00AM +0800, Fengguang Wu wrote:
    > On Thu, Oct 10, 2013 at 11:26:37AM +0800, Fengguang Wu wrote:
    > > Dave,
    > >
    > > > I note that you have CONFIG_SLUB=y, which means that the cache slabs
    > > > are shared with objects of other types. That means that the memory
    > > > corruption problem is likely to be caused by one of the other
    > > > filesystems that is probing the block device(s), not XFS.
    > >
    > > Good to know that, it would easy to test then: just turn off every
    > > other filesystems. I'll try it right away.
    >
    > Seems that we don't even need to do that. A dig through the oops
    > database and I find stack dumps from other FS.
    >
    > This happens in the kernel with same kconfig and commit 3.12-rc1.

    Here is a summary of all FS with oops:

    411 ocfs2_fill_super
    189 xfs_fs_fill_super
    86 jfs_fill_super
    50 isofs_fill_super
    33 fat_fill_super
    18 vfat_fill_super
    15 msdos_fill_super
    11 ext2_fill_super
    10 ext3_fill_super
    3 reiserfs_fill_super

    Thanks,
    Fengguang


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