postgres.git / summary / log / commit / refs

commit    fd079dd0915a2005da2fbfd75fda1cc3611f3a2f
Author:   Tom Lane <tgl@sss.pgh.pa.us>
Date:     Sat Jun 16 18:45:47 2018 +0000

    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


 contrib/pg_xlogdump/compat.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/contrib/pg_xlogdump/compat.c b/contrib/pg_xlogdump/compat.c
index 6ca7012fd90..fe30f541e3a 100644
--- a/contrib/pg_xlogdump/compat.c
+++ b/contrib/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;


[parent: 817f9f9a8a19]