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BUG: shift overflow in utf-8 decode

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An initial byte \xFF will ask for 7 continuation bytes, and then the
shift by (count * 5) will try to shift 35 bits.
This commit is contained in:
Roberto I
2026-02-18 13:24:04 -03:00
parent 7c40c5edb2
commit 10eb89d114
3 changed files with 18 additions and 3 deletions
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makefile
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@@ -60,7 +60,7 @@ CWARNS= $(CWARNSCPP) $(CWARNSC) $(CWARNGCC)
# create problems; some are only available in newer gcc versions. To
# use some of them, we also have to define an environment variable
# ASAN_OPTIONS="detect_invalid_pointer_pairs=2".
# -fsanitize=undefined
# -fsanitize=undefined (you may need to add "-lubsan" to libs)
# -fsanitize=pointer-subtract -fsanitize=address -fsanitize=pointer-compare
# TESTS= -DLUA_USER_H='"ltests.h"' -Og -g