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postgresql/src/fe_utils
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Tom Lane 991a60a9f2 Make escaping functions retain trailing bytes of an invalid character. 
Instead of dropping the trailing byte(s) of an invalid or incomplete
multibyte character, replace only the first byte with a known-invalid
sequence, and process the rest normally.  This seems less likely to
confuse incautious callers than the behavior adopted in 5dc1e42b4.

While we're at it, adjust PQescapeStringInternal to produce at most
one bleat about invalid multibyte characters per string.  This
matches the behavior of PQescapeInternal, and avoids the risk of
producing tons of repetitive junk if a long string is simply given
in the wrong encoding.

This is a followup to the fixes for CVE-2025-1094, and should be
included if cherry-picking those fixes.

Author: Andres Freund <andres@anarazel.de>
Co-authored-by: Tom Lane <tgl@sss.pgh.pa.us>
Reported-by: Jeff Davis <pgsql@j-davis.com>
Discussion: https://postgr.es/m/20250215012712.45@rfd.leadboat.com
Backpatch-through: 13
2025-02-15 16:20:21 -05:00
..
.gitignore Move psql's psqlscan.l into src/fe_utils. 2016-03-24 20:28:47 -04:00
archive.c Revert refactoring of restore command code to shell_restore.c 2023-02-06 08:28:42 +09:00
cancel.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
conditional.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
connect_utils.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
Makefile Update copyright for 2023 2023-01-02 15:00:37 -05:00
mbprint.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
meson.build Update copyright for 2023 2023-01-02 15:00:37 -05:00
option_utils.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
parallel_slot.c Don't spuriously report FD_SETSIZE exhaustion on Windows. 2023-10-14 15:54:49 -07:00
print.c Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
psqlscan.l Prevent mis-encoding of "trailing junk after numeric literal" errors. 2024-09-05 12:42:33 -04:00
query_utils.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
recovery_gen.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
simple_list.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
string_utils.c Make escaping functions retain trailing bytes of an invalid character. 2025-02-15 16:20:21 -05:00