lkml.org 
[lkml]   [2002]   [Dec]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    SubjectRe: two 2.5 modules bugs
    Date
    In message <200212271616.RAA03356@harpo.it.uu.se> you write:
    > 1. With kernel 2.5.53 and module-init-tools-0.9.6, "modprobe tulip"
    > fails and goes into an infinite CPU-consuming loop. The problem
    > appears to be related to the dependency from tulip to crc32. If I
    > manually modprobe crc32 before modprobe tulip, it works. If crc32
    > isn't loaded, modprobe tulip first loads crc32 and then loops.
    >
    > module-init-tools-0.9.5 did not have this problem.

    This should be fixed in 0.9.6: a double free caused all kinds of wierd
    behavior. Please tell me if this fixes it.

    > 2. The implementation of old-style MODULE_PARMs with type "1-16s"
    > is broken. Instead of splicing the parameter at the commas and
    > storing pointers to the substrings in consecutive array elements,
    > the whole string is stored in the array instead.
    >
    > Consider parport_pc.c, which contains (simplified):
    >
    > static const char *irq[16];
    > MODULE_PARM(irq, "1-16s");
    >
    > "modprobe parport_pc irq=007" should store a pointer to "007" in
    > irq[0], but instead (unsigned int)irq[0] == 0x00373030, the ASCII
    > representation of "007" in little-endian. (Kernel 2.5.53 on x86,
    > with module-init-tools-0.9.[56].)

    Ew. I horribly misinterpreted "1-16s" to mean "a string 1-16 chars
    long". The obvious fix (untested) is:

    diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.53/kernel/module.c working-2.5.53-sparam/kernel/module.c
    --- linux-2.5.53/kernel/module.c 2002-12-26 15:41:06.000000000 +1100
    +++ working-2.5.53-sparam/kernel/module.c 2002-12-28 21:32:34.000000000 +1100
    @@ -604,7 +604,8 @@ extern int set_obsolete(const char *val,
    return param_array(kp->name, val, min, max, obsparm->addr,
    sizeof(long), param_set_long);
    case 's':
    - return param_string(kp->name, val, min, max, obsparm->addr);
    + return param_array(kp->name, val, min, max, obsparm->addr,
    + sizeof(char *), param_set_charp);
    }
    printk(KERN_ERR "Unknown obsolete parameter type %s\n", obsparm->type);
    return -EINVAL;
    I'll test this tomorrow...

    Thanks for the bug report!
    Rusty.
    --
    Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:31    [W:0.021 / U:29.996 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site