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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2018-06-16 14:45:47 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2018-06-16 14:45:47 -0400 |
| commit | f3be5d3e7891ef6886489cb0c9962d52c5983c70 (patch) | |
| tree | b088e93de765fac9f91f3dbb8cc999916cbc57e1 /src | |
| parent | 2dbcf515ae1e8845d4903169ff81c91806c34d32 (diff) | |
| download | postgresql-f3be5d3e7891ef6886489cb0c9962d52c5983c70.tar.gz postgresql-f3be5d3e7891ef6886489cb0c9962d52c5983c70.zip | |
Use snprintf not sprintf in pg_waldump's timestamptz_to_str.
This could only cause an issue if strftime returned a ridiculously
long timezone name, which seems unlikely; and it wouldn't qualify
as a security problem even then, since pg_waldump (nee pg_xlogdump)
is a debug tool not part of the server. But gcc 8 has started issuing
warnings about it, so let's use snprintf and be safe.
Backpatch to 9.3 where this code was added.
Discussion: https://postgr.es/m/21789.1529170195@sss.pgh.pa.us
Diffstat (limited to 'src')
| -rw-r--r-- | src/bin/pg_xlogdump/compat.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/bin/pg_xlogdump/compat.c b/src/bin/pg_xlogdump/compat.c index 3d8ce303a97..71b7272faaa 100644 --- a/src/bin/pg_xlogdump/compat.c +++ b/src/bin/pg_xlogdump/compat.c @@ -64,9 +64,11 @@ timestamptz_to_str(TimestampTz dt) strftime(zone, sizeof(zone), "%Z", ltime); #ifdef HAVE_INT64_TIMESTAMP - sprintf(buf, "%s.%06d %s", ts, (int) (dt % USECS_PER_SEC), zone); + snprintf(buf, sizeof(buf), + "%s.%06d %s", ts, (int) (dt % USECS_PER_SEC), zone); #else - sprintf(buf, "%s.%.6f %s", ts, fabs(dt - floor(dt)), zone); + snprintf(buf, sizeof(buf), + "%s.%.6f %s", ts, fabs(dt - floor(dt)), zone); #endif return buf; |