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Use memory safe snprintf() in Connect Engine

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This commit replaces sprintf(buf, ...) with
snprintf(buf, sizeof(buf), ...),
specifically in the "easy" cases where buf is allocated with a size
known at compile time.

The changes make sure we are not write outside array/string bounds which
will lead to undefined behaviour. In case the code is trying to write
outside bounds - safe version of functions simply cut the string
messages so we process this gracefully.

All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the BSD-new
license.  I am contributing on behalf of my employer Amazon Web Services,
Inc.

bsonudf.cpp warnings cleanup by Daniel Black

Reviewer: Daniel Black
This commit is contained in:
Mikhail Chalov
2022-07-19 19:06:55 +00:00
committed by Daniel Black
parent 95eb5e5a12
commit 19af1890b5
61 changed files with 931 additions and 919 deletions
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4
storage/connect/plugutil.cpp
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@@ -478,7 +478,7 @@ bool AllocSarea(PGLOBAL g, size_t size)
g->Sarea = malloc(size);
if (!g->Sarea) {
sprintf(g->Message, MSG(MALLOC_ERROR), "malloc");
snprintf(g->Message, sizeof(g->Message), MSG(MALLOC_ERROR), "malloc");
g->Sarea_Size = 0;
} else {
g->Sarea_Size = size;
@@ -574,7 +574,7 @@ void *PlugSubAlloc(PGLOBAL g, void *memp, size_t size)
if (size > pph->FreeBlk) { /* Not enough memory left in pool */
PCSZ pname = "Work";
sprintf(g->Message,
snprintf(g->Message, sizeof(g->Message),
"Not enough memory in %s area for request of %zd (used=%zd free=%zd)",
pname, size, pph->To_Free, pph->FreeBlk);