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    SubjectRe: unable to handle kernel paging request when inserting FAT32 formatted flash media
    Date
    OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> writes:

    > Tino Keitel <tino.keitel@tikei.de> writes:
    >
    >>> > Yes, it is reproducible. It happens with a CF card from a Canon DSLR as
    >>> > well as with a SD card from a little Fuji cam. Configs are attached.
    >>>
    >>> .config didn't have interest part for now. Could you send another oops,
    >>> and vfat.ko, fat.ko? I'd like to see more detail by assembler, current
    >>> oops is unclear...
    >>
    >> Another Oops, this time with the SD card, and the modules are attached.
    >>
    >>> And if possible, git bisect is appreciate.
    >>
    >> Lack of spare time currently, sorry.
    >
    > OK. Thanks for your help.

    It seems to be interesting exception.

    before relocation (from fat.ko)
    8656: 74 51 je 86a9 <fat_build_inode+0x2e9>
    8658: 49 c7 c6 00 00 00 00 mov $0x0,%r14
    865f: b2 b6 mov $0xb6,%dl
    8661: 80 3d 00 00 00 00 00 cmpb $0x0,0x0(%rip) <-- exception
    8668: 74 3f je 86a9 <fat_build_inode+0x2e9>
    866a: 49 8d 44 24 08 lea 0x8(%r12),%rax

    after relocation (from oops)

    20: 74 51 je 73 <a+0x73>
    22: 49 c7 c6 d8 91 13 a0 mov $0xffffffffa01391d8,%r14
    29: b2 b6 mov $0xb6,%dl
    2b: 3d fc 9b 00 00 cmp $0x9bfc,%eax
    30: 00 74 3f 49 add %dh,0x49(%rdi,%rdi,1)
    34: 8d 44 24 08 lea 0x8(%rsp),%eax

    relocation info would be this
    0x0000000000006883 X86_64_32S 000000000000000000 +253 .rodata.str1.1

    Although I'm not sure at all for now, I'm guessing something wrong
    happened around relocation.

    Thanks.
    --
    OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>


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