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Description: Off-by-one error in the dwarf_to_unw_regnum function in include/dwarf_i.h in
libunwind 1.1 allows local users to have unspecified impact via invalid dwarf opcodes.
--- a/external/libunwind/include/dwarf_i.h
+++ b/external/libunwind/include/dwarf_i.h
@@ -20,7 +20,7 @@
extern const uint8_t dwarf_to_unw_regnum_map[DWARF_REGNUM_MAP_LENGTH];
/* REG is evaluated multiple times; it better be side-effects free! */
# define dwarf_to_unw_regnum(reg) \
- (((reg) <= DWARF_REGNUM_MAP_LENGTH) ? dwarf_to_unw_regnum_map[reg] : 0)
+ (((reg) < DWARF_REGNUM_MAP_LENGTH) ? dwarf_to_unw_regnum_map[reg] : 0)
#endif
#ifdef UNW_LOCAL_ONLY
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