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https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=218379
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Index: gdb-7.5.50.20130118/gdb/symtab.c
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===================================================================
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--- gdb-7.5.50.20130118.orig/gdb/symtab.c	2013-01-18 23:53:22.009797788 +0100
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+++ gdb-7.5.50.20130118/gdb/symtab.c	2013-01-18 23:53:51.044846777 +0100
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@@ -2356,6 +2356,13 @@ find_pc_sect_line (CORE_ADDR pc, struct
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 	     SYMBOL_LINKAGE_NAME (msymbol)); */
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 	  ;
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 	/* fall through */
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+	/* `msymbol' trampoline may be located before its .text symbol
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+	   but this text symbol may be the address we were looking for.
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+	   Avoid `find_pc_sect_line'<->`find_pc_line' infinite loop.
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+	   Red Hat Bug 218379.  */
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+	else if (SYMBOL_VALUE (mfunsym) == pc)
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+	  warning ("In stub for %s (0x%s); interlocked, please submit the binary to http://bugzilla.redhat.com", SYMBOL_LINKAGE_NAME (msymbol), paddress (target_gdbarch (), pc));
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+	/* fall through */
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 	else
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 	  return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
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       }