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SubjectRe: Modutils 2.3.14 / Kernel 2.4.0-test11 incompatibility
Date
Keith Owens writes:
> On Wed, 22 Nov 2000 23:12:25 +0000 (GMT),
> Russell King <rmk@arm.linux.org.uk> wrote:
> > if (copy_from_user(mod+1, mod_user+1, mod->size-sizeof(*mod))) {
>
> Using sizeof(struct module) is a nono in sys_init_module(), the code
> has to use the user space size. Does this untested patch fix the
> problem? Against 2.4.0-test11-pre6 but should fit test11.
>
>
> Index: 0-test11-pre6.1/kernel/module.c
> --- 0-test11-pre6.1/kernel/module.c Wed, 08 Nov 2000 11:52:15 +1100 kaos (linux-2.4/j/28_module.c 1.1.2.1.1.1.7.1.1.1 644)
> +++ 0-test11-pre6.1(w)/kernel/module.c Thu, 23 Nov 2000 10:22:26 +1100 kaos (linux-2.4/j/28_module.c 1.1.2.1.1.1.7.1.1.1 644)
> @@ -480,7 +480,9 @@ sys_init_module(const char *name_user, s
>
> /* Ok, that's about all the sanity we can stomach; copy the rest. */
>
> - if (copy_from_user(mod+1, mod_user+1, mod->size-sizeof(*mod))) {
> + if (copy_from_user((char *)mod+mod_user_size,
> + (char *)mod_user+mod_user_size,
> + mod->size-mod_user_size)) {
> error = -EFAULT;
> goto err3;
> }

This also works!
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| | Russell King rmk@arm.linux.org.uk --- ---
| | | | http://www.arm.linux.org.uk/personal/aboutme.html / / |
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/ | THE developer of ARM Linux |+| /|\
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