From 07cf922195d1e2eb1481da04048858b9d32928b6 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Sat, 10 May 2025 12:17:23 +0930 Subject: [PATCH] ubsan: size_inc_line_addr integer overflow Fix a fuzzer testcase where a large positive line_delta causes signed overflow when subtracting -5. Signed overflow is perfectly OK here. --- gas/dwarf2dbg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c index 2963e52958a..955119bd87a 100644 --- a/gas/dwarf2dbg.c +++ b/gas/dwarf2dbg.c @@ -1632,7 +1632,7 @@ size_inc_line_addr (int line_delta, addressT addr_delta) } /* Bias the line delta by the base. */ - tmp = line_delta - DWARF2_LINE_BASE; + tmp = (unsigned) line_delta - DWARF2_LINE_BASE; /* If the line increment is out of range of a special opcode, we must encode it with DW_LNS_advance_line. */ -- 2.39.5