Greetings,

Calling alloca in a loop is a bad idea.
Here is a fix for gdb/10457; rather on the obvious side.

Thanks,
-- 
Paul Pluzhnikov

2009-10-07  Paul Pluzhnikov  <ppluzhnikov@google.com>

        * elfread.c (elf_symtab_read): Don't use alloca in a loop.