[Bug 5444] New: busybox segfaults with 2-component linux version string

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5444

           Summary: busybox segfaults with 2-component linux version
                    string
           Product: Busybox
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Other
        AssignedTo: unassigned at busybox.net
        ReportedBy: mjt+busybox at tls.msk.ru
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


I remember I filed a similar bug already, but can't find it now, so here it
goes.

The summary tells it all.  With 2-component linux version string (like 3.0 or
3.5), busybox segfaults, because it expects the kernel version string to have
at least 3 components.

The attached patch fixes this.

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