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    Subject[PATCH v2 0/1] f2fs: fix sanity_check_raw_super on big endian machines
    Date
    Big endian machines (at least the one I have access to) cannot mount
    f2fs filesystems anymore.
    This is with Linux 4.14.89 but I suspect that 4.9.144 (and later) is
    affected as well.

    commit 0cfe75c5b01199 ("f2fs: enhance sanity_check_raw_super() to avoid
    potential overflows") treats the "block_count" from struct
    f2fs_super_block as 32-bit little endian value instead of a 64-bit
    little endian value.

    I tested this fix on top of Linux 4.14.49 but it seems that all stable
    and mainline kernel versions are affected:
    - 4.9.144 and later because 0cfe75c5b01199 was backported there
    - 4.14.86 and later because 0cfe75c5b01199 was backported there
    - 4.19
    - 4.20-rcX


    changes since v1 at [0]:
    - change the printk format for block_count from "%u" to "%llu" (thanks
    to "kbuild test robot" for spotting this)
    - added Chao Yu's reviewed by


    [0] https://lore.kernel.org/patchwork/cover/1027285/


    Martin Blumenstingl (1):
    f2fs: fix validation of the block count in sanity_check_raw_super

    fs/f2fs/super.c | 6 +++---
    1 file changed, 3 insertions(+), 3 deletions(-)

    --
    2.20.1

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