From fe1782dfb6b24cb764033a4de0ceb28ca987c064 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Tue, 18 Dec 2007 00:04:16 +0000 Subject: [PATCH] Make path_recv() and poly_recv() reject paths/polygons containing no points. The zero-point case is sensible so far as the data structure is concerned, so maybe we ought to allow it sometime; but right now the textual input routines for these types don't allow it, and it seems that not all the functions for the types are prepared to cope. Report and patch by Merlin Moncure. --- src/backend/utils/adt/geo_ops.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/backend/utils/adt/geo_ops.c b/src/backend/utils/adt/geo_ops.c index 3911df5bb8..b3744587af 100644 --- a/src/backend/utils/adt/geo_ops.c +++ b/src/backend/utils/adt/geo_ops.c @@ -1456,7 +1456,7 @@ path_recv(PG_FUNCTION_ARGS) closed = pq_getmsgbyte(buf); npts = pq_getmsgint(buf, sizeof(int32)); - if (npts < 0 || npts >= (int32) ((INT_MAX - offsetof(PATH, p[0])) / sizeof(Point))) + if (npts <= 0 || npts >= (int32) ((INT_MAX - offsetof(PATH, p[0])) / sizeof(Point))) ereport(ERROR, (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION), errmsg("invalid number of points in external \"path\" value"))); @@ -3484,7 +3484,7 @@ poly_recv(PG_FUNCTION_ARGS) int size; npts = pq_getmsgint(buf, sizeof(int32)); - if (npts < 0 || npts >= (int32) ((INT_MAX - offsetof(POLYGON, p[0])) / sizeof(Point))) + if (npts <= 0 || npts >= (int32) ((INT_MAX - offsetof(POLYGON, p[0])) / sizeof(Point))) ereport(ERROR, (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION), errmsg("invalid number of points in external \"polygon\" value"))); -- 2.39.5