The afl fuzzer found a case where we tried reading an uleb for the DIE
abbrev code without properly checking the DIE address is inside the CU.
Signed-off-by: Mark Wielaard <m...@klomp.org>
---
libdw/ChangeLog | 4 ++++
libdw/libdwP.h | 2 +-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/libdw/ChangeLog b/libdw/ChangeLog
index b000492..b569393 100644
--- a/libdw/ChangeLog
+++ b/libdw/ChangeLog
@@ -1,5 +1,9 @@
2018-06-06 Mark Wielaard <m...@klomp.org>
+ * libdwP.h (__libdw_dieabbrev): Check DIE addr falls in cu.
+
+2018-06-06 Mark Wielaard <m...@klomp.org>
+
* dwarf_getlocation_die.c (dwarf_getlocation_die): Check offset
falls inside cu data.
diff --git a/libdw/libdwP.h b/libdw/libdwP.h
index 1c8dd0d..3d8e145 100644
--- a/libdw/libdwP.h
+++ b/libdw/libdwP.h
@@ -653,7 +653,7 @@ __libdw_dieabbrev (Dwarf_Die *die, const unsigned char
**readp)
/* Get the abbreviation code. */
unsigned int code;
const unsigned char *addr = die->addr;
- if (die->cu == NULL)
+ if (die->cu == NULL || addr >= (const unsigned char *) die->cu->endp)
return DWARF_END_ABBREV;
get_uleb128 (code, addr, die->cu->endp);
if (readp != NULL)
--
1.8.3.1
