commit a17dc0875ad0d434d9cf66d36ed23fbd69286bf3
Author: Nick Mathewson <[email protected]>
Date: Mon May 7 13:56:39 2018 -0400
Avoid unsigned integer underflow on empty input.
---
src/or/dirserv.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/or/dirserv.c b/src/or/dirserv.c
index d9a9b8522..e47533759 100644
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@ -2641,6 +2641,12 @@ measured_bw_line_parse(measured_bw_line_t *out, const
char *orig_line)
int got_node_id = 0;
char *strtok_state; /* lame sauce d'jour */
+ if (strlen(line) == 0) {
+ log_warn(LD_DIRSERV, "Empty line in bandwidth file");
+ tor_free(line);
+ return -1;
+ }
+
/* Remove end of line character, so that is not part of the token */
if (line[strlen(line) - 1] == '\n') {
line[strlen(line) - 1] = '\0';
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