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postgresql/src/common
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Thomas Munro 6ed116046d Fix mb2wchar functions on short input. 
When converting multibyte to pg_wchar, the UTF-8 implementation would
silently ignore an incomplete final character, while the other
implementations would cast a single byte to pg_wchar, and then repeat
for the remaining byte sequence.  While it didn't overrun the buffer, it
was surely garbage output.

Make all encodings behave like the UTF-8 implementation.  A later change
for master only will convert this to an error, but we choose not to
back-patch that behavior change on the off-chance that someone is
relying on the existing UTF-8 behavior.

Security: CVE-2026-2006
Backpatch-through: 14
Author: Thomas Munro <thomas.munro@gmail.com>
Reported-by: Noah Misch <noah@leadboat.com>
Reviewed-by: Noah Misch <noah@leadboat.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
2026-02-09 12:38:12 +13:00
..
unicode Update copyright for 2021 2021-01-02 13:06:25 -05:00
.gitignore Replace the data structure used for keyword lookup. 2019-01-06 17:02:57 -05:00
archive.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
base64.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
checksum_helper.c Add result size as argument of pg_cryptohash_final() for overflow checks 2021-02-15 10:18:34 +09:00
config_info.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
controldata_utils.c Try to handle torn reads of pg_control in frontend. 2023-10-16 17:23:25 +13:00
cryptohash.c Revert error handling improvements for cryptohashes 2022-01-14 11:25:39 +09:00
cryptohash_openssl.c Revert error handling improvements for cryptohashes 2022-01-14 11:25:39 +09:00
d2s.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
d2s_full_table.h Update copyright for 2021 2021-01-02 13:06:25 -05:00
d2s_intrinsics.h Update copyright for 2021 2021-01-02 13:06:25 -05:00
digit_table.h Change floating-point output format for improved performance. 2019-02-13 15:20:33 +00:00
encnames.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
exec.c Make EXEC_BACKEND more convenient on Linux and FreeBSD. 2023-02-08 13:09:27 +09:00
f2s.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
fe_memutils.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
file_perm.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
file_utils.c Replace pgwin32_is_junction() with lstat(). 2024-11-08 09:36:53 +10:30
hashfn.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
hmac.c Fix incorrect comments in hmac.c and hmac_openssl.c 2022-01-13 09:43:44 +09:00
hmac_openssl.c Fix incorrect comments in hmac.c and hmac_openssl.c 2022-01-13 09:43:44 +09:00
ip.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
jsonapi.c With GB18030, prevent SIGSEGV from reading past end of allocation. 2025-05-05 04:52:08 -07:00
keywords.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
kwlookup.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
link-canary.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
logging.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
Makefile Revert refactoring of hex code to src/common/ 2021-08-19 09:20:19 +09:00
md5.c Make fallback MD5 implementation thread-safe on big-endian systems 2024-08-07 10:44:16 +03:00
md5_common.c Revert error handling improvements for cryptohashes 2022-01-14 11:25:39 +09:00
md5_int.h Update copyright for 2021 2021-01-02 13:06:25 -05:00
pg_get_line.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
pg_lzcompress.c Improve pglz_decompress's defenses against corrupt compressed data. 2023-10-18 20:43:17 -04:00
pgfnames.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
protocol_openssl.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
psprintf.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
relpath.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
restricted_token.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
rmtree.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
ryu_common.h Update copyright for 2021 2021-01-02 13:06:25 -05:00
saslprep.c Protect against small overread in SASLprep validation 2026-02-06 11:09:09 -08:00
scram-common.c Refactor HMAC implementations 2021-04-03 17:30:49 +09:00
sha1.c Adjust locations which have an incorrect copyright year 2021-06-04 12:19:50 +12:00
sha1_int.h Adjust locations which have an incorrect copyright year 2021-06-04 12:19:50 +12:00
sha2.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
sha2_int.h Update copyright for 2021 2021-01-02 13:06:25 -05:00
sprompt.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
string.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
stringinfo.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
unicode_norm.c Fix buffer overrun in unicode string normalization with empty input 2021-11-11 15:01:45 +09:00
username.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
wait_error.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
wchar.c Fix mb2wchar functions on short input. 2026-02-09 12:38:12 +13:00