Created attachment 111121 [details]
Output from serial console

This is the kernel output from the serial console.

2.6.9-5.EL.hjl.0.3smp

a) sounds like this should be a rhel bug
b) what modifications are in this kernel ?

It happened with both FC3 and RHEL 4 kernels. I just happened to
have a serial cable on my RHEL 4 machine. I don't think it is
unrelated to my modification. I verified it with the unmodified
2.6.10-1.766_FC3 UP and SMP kernel binary rpms.

I meant to say that the crash is unrelated to my changes.

I don't see how this code in sysenter.c:

        addr = do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC,
MAP_PRIVATE, 0);         current->mm->context.vdso = (void *)addr;
        ti->sysenter_return = (void *)addr +
(long)&SYSENTER_RETURN_OFFSET;
        if (addr != -1) {                 vma = find_vma(current->mm,
addr);
                if (vma) {
                        pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
                        get_page(sysenter_page);
                        install_page(current->mm, vma, addr,
                                        sysenter_page, vma->vm_page_prot);

                }         }

will work since install_page expects a file backed page while
sysenter_page isn't backed by a file at all. Another thing,
map_vsyscall may be called before sysenter_setup such that
sysenter_page may be NULL.

*** This bug has been marked as a duplicate of 139318 ***