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    SubjectRe: Regression in Autofs, 2.6.15-git
    On Sat, Jan 14, 2006 at 05:17:37AM -0800, Andrew Morton wrote:
    > You oopsed accessing 0x00000030, and offsetof(super_block, s_flags) is
    > 0x30. So autofs4 has passed in a dentry which has a NULL
    > dentry->d_inode->i_sb and the new code didn't expect that.

    It's not just new code... inode->i_sb should _never_ be NULL, period.
    We set it immediately after memory had been allocated by alloc_inode()
    and never modify afterwards, let alone reset to NULL.
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