From 6aea08d9f3e3d6475a65454da488a0c51f5dc97d Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Tue, 17 Apr 2018 12:35:55 +0100 Subject: Fix illegal memory access when parsing corrupt DWARF information. PR 23064 * dwarf.c (process_cu_tu_index): Test for a potential buffer overrun before copying signature pointer. --- binutils/dwarf.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'binutils/dwarf.c') diff --git a/binutils/dwarf.c b/binutils/dwarf.c index 10b4e28..f94f5b2 100644 --- a/binutils/dwarf.c +++ b/binutils/dwarf.c @@ -9287,7 +9287,18 @@ process_cu_tu_index (struct dwarf_section *section, int do_display) } if (!do_display) - memcpy (&this_set[row - 1].signature, ph, sizeof (uint64_t)); + { + size_t num_copy = sizeof (uint64_t); + + /* PR 23064: Beware of buffer overflow. */ + if (ph + num_copy < limit) + memcpy (&this_set[row - 1].signature, ph, num_copy); + else + { + warn (_("Signature (%p) extends beyond end of space in section\n"), ph); + return 0; + } + } prow = poffsets + (row - 1) * ncols * 4; /* PR 17531: file: b8ce60a8. */ -- cgit v1.1