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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2023-03-14 19:17:31 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2023-03-14 19:17:31 -0400 |
| commit | b081fe4199b69dc561f7d31c6a82b3ad996f657f (patch) | |
| tree | 75cdcdaf8a38e35b09677d74fd4ecb5a11848292 /src/backend/parser/parse_expr.c | |
| parent | a563c24c9574b74f4883c004c89275bba03c3c26 (diff) | |
| download | postgresql-b081fe4199b69dc561f7d31c6a82b3ad996f657f.tar.gz postgresql-b081fe4199b69dc561f7d31c6a82b3ad996f657f.zip | |
Fix corner case bug in numeric to_char() some more.
The band-aid applied in commit f0bedf3e4 turns out to still need
some work: it made sure we didn't set Np->last_relevant too small
(to the left of the decimal point), but it didn't prevent setting
it too large (off the end of the partially-converted string).
This could result in fetching data beyond the end of the allocated
space, which with very bad luck could cause a SIGSEGV, though
I don't see any hazard of interesting memory disclosure.
Per bug #17839 from Thiago Nunes. The bug's pretty ancient,
so back-patch to all supported versions.
Discussion: https://postgr.es/m/17839-aada50db24d7b0da@postgresql.org
Diffstat (limited to 'src/backend/parser/parse_expr.c')
0 files changed, 0 insertions, 0 deletions