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postgresql/src/common
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Tom Lane 0ee9d685dd Fix JSON error reporting for many cases of erroneous string values. 
The majority of error exit cases in json_lex_string() failed to
set lex->token_terminator, causing problems for the error context
reporting code: it would see token_terminator less than token_start
and do something more or less nuts.  In v14 and up the end result
could be as bad as a crash in report_json_context().  Older
versions accidentally avoided that fate; but all versions produce
error context lines that are far less useful than intended,
because they'd stop at the end of the prior token instead of
continuing to where the actually-bad input is.

To fix, invent some macros that make it less notationally painful
to do the right thing.  Also add documentation about what the
function is actually required to do; and in >= v14, add an assertion
in report_json_context about token_terminator being sufficiently
far advanced.

Per report from Nikolay Shaplov.  Back-patch to all supported
versions.

Discussion: https://postgr.es/m/7332649.x5DLKWyVIX@thinkpad-pgpro
 		2023-03-13 15:19:00 -04:00
..
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
Makefile Revert refactoring of hex code to src/common/ 2021-08-19 09:20:19 +09:00
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 Update copyright for 2021 2021-01-02 13:06:25 -05:00
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 Fix get_dirent_type() for symlinks on MinGW/MSYS. 2022-07-28 14:27:06 +12:00
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 Fix JSON error reporting for many cases of erroneous string values. 2023-03-13 15:19:00 -04:00
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
md5.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
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 Fix typos and grammar in comments and docs 2021-04-19 11:32:30 +09:00
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 Update copyright for 2021 2021-01-02 13:06:25 -05:00
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 incautious handling of possibly-miscoded strings in client code. 2021-06-07 14:15:25 -04:00