tool_writeout: fixed a buffer read overrun on --write-out
If a % ended the statement, the string's trailing NUL would be skipped
and memory past the end of the buffer would be accessed and potentially
displayed as part of the --write-out output. Added tests 1440 and 1441
to check for this kind of condition.
Reported-by: Brian Carpenter
diff --git a/src/tool_writeout.c b/src/tool_writeout.c
index 2fb7774..7843182 100644
--- a/src/tool_writeout.c
+++ b/src/tool_writeout.c
@@ -113,7 +113,7 @@
double doubleinfo;
while(ptr && *ptr) {
- if('%' == *ptr) {
+ if('%' == *ptr && ptr[1]) {
if('%' == ptr[1]) {
/* an escaped %-letter */
fputc('%', stream);
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 7742bcf..a6a06b8 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -153,7 +153,7 @@
test1416 test1417 test1418 test1419 test1420 test1421 test1422 test1423 \
test1424 \
test1428 test1429 test1430 test1431 test1432 test1433 test1434 test1435 \
-test1436 test1437 test1438 test1439 \
+test1436 test1437 test1438 test1439 test1440 test1441 \
\
test1500 test1501 test1502 test1503 test1504 test1505 test1506 test1507 \
test1508 test1509 test1510 test1511 test1512 test1513 test1514 test1515 \
diff --git a/tests/data/test1440 b/tests/data/test1440
new file mode 100644
index 0000000..7ed0c4d
--- /dev/null
+++ b/tests/data/test1440
@@ -0,0 +1,31 @@
+<testcase>
+<info>
+<keywords>
+--write-out
+</keywords>
+</info>
+# Server-side
+<reply>
+</reply>
+
+# Client-side
+<client>
+<server>
+file
+</server>
+
+<name>
+Check --write-out with trailing %{
+</name>
+<command>
+file://localhost/%PWD/log/ --write-out '%{'
+</command>
+</client>
+
+# Verify data
+<verify>
+<stdout nonewline="yes">
+%{
+</stdout>
+</verify>
+</testcase>
diff --git a/tests/data/test1441 b/tests/data/test1441
new file mode 100644
index 0000000..6e253a6
--- /dev/null
+++ b/tests/data/test1441
@@ -0,0 +1,31 @@
+<testcase>
+<info>
+<keywords>
+--write-out
+</keywords>
+</info>
+# Server-side
+<reply>
+</reply>
+
+# Client-side
+<client>
+<server>
+file
+</server>
+
+<name>
+Check --write-out with trailing %
+</name>
+<command>
+file://localhost/%PWD/log/ --write-out '%'
+</command>
+</client>
+
+# Verify data
+<verify>
+<stdout nonewline="yes">
+%
+</stdout>
+</verify>
+</testcase>
