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    SubjectRe: [OOPS][RESEND] 2.6.0-test4-mm4
    Bongani Hlope <> wrote:
    > I got the following oops when I was trying to load alsa drivers on
    > the 2.6.0-test4-mm4 kernel.

    Generally it's best to enable CONFIG_ALLSYMS and not bother running
    ksymoops: the kernel does the decode for you.

    The problem with ksymoops seems to be that it causes people to not send
    important preceding messages. In this case:

    printk(KERN_ERR "kfree_debugcheck: out of range ptr %lxh.\n",
    (unsigned long)objp);

    > ksymoops 2.4.9 on i686 2.6.0-test4-mm3-1. Options used
    > -V (default)
    > -k /proc/ksyms (default)
    > -l /proc/modules (default)
    > -o /lib/modules/2.6.0-test4-mm4 (specified)
    > -m /boot/ (specified)
    > Error (regular_file): read_ksyms stat /proc/ksyms failed
    > No modules in ksyms, skipping objects
    > No ksyms, skipping lsmod
    > kernel BUG at mm/slab.c:1623!
    > invalid operand: 0000 [#1]
    > CPU: 0
    > EIP: 0060:[<c0147b8b>] Not tainted VLI
    > Using defaults from ksymoops -t elf32-i386 -a i386
    > EFLAGS: 00010086
    > eax: 00000031 ebx: 000ab6b6 ecx: c04cde64 edx: c0406338
    > esi: c0408920 edi: c04077f8 ebp: 6b6b6b6b esp: cfc4def8
    > ds: 007b es: 007b ss: 0068
    > Stack: c03b8700 6b6b6b6b 0000006b cffe39f0 c0210f86 ce119b64 cffead14 00000202
    > ce119b68 c0408920 c04077f8 00000000 c0210f77 6b6b6b6b c40348e8 00000080
    > c016796a ce119b68 00000000 00000100 00000008 d38adb2f 00000074 d38adec7
    > Call Trace:
    > [<c0210f86>] kobject_cleanup+0x56/0x60
    > [<c0210f77>] kobject_cleanup+0x47/0x60
    > [<c016796a>] unregister_chrdev+0x8a/0xa0
    > [<d38adb2f>] alsa_sound_exit+0x7f/0xb0 [snd]
    > [<c0138328>] sys_delete_module+0x158/0x1d0
    > [<c01511a3>] do_munmap+0x163/0x1f0

    Anyway, you died in kobject_cleanup()'s call to kfree(kobj->k_name), which
    was newly added as a part of kobject-unlimited-name-lengths.patch.

    Is it repeatable? Exactly which modules were you attempting to load at the
    time? And please send your .config.

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      Last update: 2005-03-22 13:48    [W:0.022 / U:7.704 seconds]
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