From d8010d3e75ec7194a4703774090b27486b742d48 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Sun, 24 Sep 2017 14:36:48 +0930 Subject: [PATCH] PR22186, divide-by-zero in decode_line_info PR 22186 * dwarf2.c (decode_line_info): Fail on lh.line_range of zero rather than dividing by zero. --- bfd/ChangeLog | 6 ++++++ bfd/dwarf2.c | 2 ++ 2 files changed, 8 insertions(+) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index f63a8bb..e232764 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,11 @@ 2017-09-24 Alan Modra + PR 22186 + * dwarf2.c (decode_line_info): Fail on lh.line_range of zero + rather than dividing by zero. + +2017-09-24 Alan Modra + PR 22169 * dwarf2.c (decode_line_info): Correct .debug_line unit_length check. diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 89a3f9b..8b2281e 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -2437,6 +2437,8 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) case DW_LNS_set_basic_block: break; case DW_LNS_const_add_pc: + if (lh.line_range == 0) + goto line_fail; if (lh.maximum_ops_per_insn == 1) address += (lh.minimum_instruction_length * ((255 - lh.opcode_base) / lh.line_range)); -- 2.7.4