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    SubjectRe: [PATCH 00/10] AXFS: Advanced XIP filesystem
    On Friday 22 August 2008, Geert Uytterhoeven wrote:
    > I gave AxFS a try on PS3 (ppc64, always use big-endian 64-bit for testing new
    > code ;-).
    > When mounting the image, I got the crash below:
    > | attempt to access beyond end of device
    > | loop0: rw=0, want=4920, limit=4912
    > | Unable to handle kernel paging request for data at address 0x00000028

    Offset 0x28 is buffer_head->b_data, so it seems like sb_bread returns NULL,
    which it does for out of range block numbers. I guess axfs_copy_block
    should check for that condition, as it can happen on malicious file system
    I agree that this is likely to get caused by an endianess bug.
    A good help for finding endianess bugs is to use __be64 like data types
    everywhere and test with sparse -D__CHECK_ENDIAN__.


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      Last update: 2008-08-22 17:23    [W:0.027 / U:26.996 seconds]
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