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Mikulas Patocka
8f71f493f4
commit0440d5c0caupstream. When slub_debug is enabled kmalloc returns unaligned memory. XFS uses this unaligned memory for its buffers (if an unaligned buffer crosses a page, XFS frees it and allocates a full page instead - see the function xfs_buf_allocate_memory). dm-crypt checks if bv_offset is aligned on page size and these checks fail with slub_debug and XFS. Fix this bug by removing the bv_offset checks. Switch to checking if bv_len is aligned instead of bv_offset (this check should be sufficient to prevent overruns if a bio with too small bv_len is received). Fixes:8f0009a225("dm crypt: optionally support larger encryption sector size") Reported-by: Bruno Prémont <bonbons@sysophe.eu> Tested-by: Bruno Prémont <bonbons@sysophe.eu> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reviewed-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.