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    SubjectRe: do_execve() needs const qualifiers (was Re: [patch 3/3] uml: fix warnings in kernel_execve)
    On Thu, Apr 02, 2009 at 12:11:14AM +0800, Am??rico Wang wrote:
    > On Mon, Mar 30, 2009 at 08:45:12PM +0200, Miklos Szeredi wrote:
    > >From: Miklos Szeredi <mszeredi@suse.cz>
    > >
    > >Fix the following warnings:
    > >
    > >arch/um/kernel/syscall.c: In function 'kernel_execve':
    > >arch/um/kernel/syscall.c:130: warning: passing argument 1 of 'um_execve' discards qualifiers from pointer target type
    > >arch/um/kernel/syscall.c:130: warning: passing argument 2 of 'um_execve' discards qualifiers from pointer target type
    > >arch/um/kernel/syscall.c:130: warning: passing argument 3 of 'um_execve' discards qualifiers from pointer target type
    > >
    > >Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
    > >---
    > > arch/um/kernel/syscall.c | 3 ++-
    > > 1 file changed, 2 insertions(+), 1 deletion(-)
    > >
    > >Index: linux-2.6/arch/um/kernel/syscall.c
    > >===================================================================
    > >--- linux-2.6.orig/arch/um/kernel/syscall.c 2009-03-30 20:25:17.000000000 +0200
    > >+++ linux-2.6/arch/um/kernel/syscall.c 2009-03-30 20:36:20.000000000 +0200
    > >@@ -127,7 +127,8 @@ int kernel_execve(const char *filename,
    > >
    > > fs = get_fs();
    > > set_fs(KERNEL_DS);
    > >- ret = um_execve(filename, argv, envp);
    > >+ ret = um_execve((char *)filename, (char __user *__user *)argv,
    > >+ (char __user *__user *) envp);
    >
    > Well... I found this many days ago and I did a similar fix.
    >
    > However, I think this doesn't fix the real problem. The real problem
    > is do_execve() doesn't have the correct const qualifiers, I am queueing
    > a huge patch to fix all the 'const' issues from do_execve() and more,
    > but I don't if Al would like it or not.

    I don't know... The thing is, it'll trail down into bprm->filename /
    bprm->interp and the things get very ugly very fast from that point.


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