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[PATCH] readelf: maximum operations per instruction cannot be zero in .debug_line.
- From: Mark Wielaard <mjw at redhat dot com>
- To: elfutils-devel at lists dot fedorahosted dot org
- Date: Sun, 07 Dec 2014 23:46:11 +0100
- Subject: [PATCH] readelf: maximum operations per instruction cannot be zero in .debug_line.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
---
src/ChangeLog | 5 +++++
src/readelf.c | 8 ++++++++
2 files changed, 13 insertions(+)
diff --git a/src/ChangeLog b/src/ChangeLog
index ccbd6e8..1c3cf2f 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,10 @@
2014-12-07 Mark Wielaard <mjw@redhat.com>
+ * readelf.c (print_debug_line_section): max_ops_per_instr cannot
+ be zero.
+
+2014-12-07 Mark Wielaard <mjw@redhat.com>
+
* readelf.c (print_ops): Handle zero ref_size for DW_OP_call_ref
and DW_OP_GNU_implicit_pointer.
diff --git a/src/readelf.c b/src/readelf.c
index 881bb45..fa9ede1 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -6506,6 +6506,14 @@ print_debug_line_section (Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr *ehdr,
op_index = (op_index + op_advance) % max_ops_per_instr;
}
+ if (max_ops_per_instr == 0)
+ {
+ error (0, 0,
+ gettext ("invalid maximum operations per instruction is zero"));
+ linep = lineendp;
+ continue;
+ }
+
while (linep < lineendp)
{
size_t offset = linep - (const unsigned char *) data->d_buf;
--
1.9.3