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Fix integer overflow in cell stats spotted by atagar.

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Fixes #5849.
This commit is contained in:
Karsten Loesing 2012-05-14 14:30:04 +02:00 committed by Nick Mathewson
parent 068046eebc
commit 2133b6e5ba
2 changed files with 11 additions and 6 deletions
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3
changes/bug5849 Normal file
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@ -0,0 +1,3 @@
o Minor bugfixes:
- Fix a (harmless) integer overflow in cell statistics reported by
some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.

14
src/or/rephist.c
View File

@ -2478,8 +2478,9 @@ char *
rep_hist_format_buffer_stats(time_t now)
{
#define SHARES 10
int processed_cells[SHARES], circs_in_share[SHARES],
number_of_circuits, i;
uint64_t processed_cells[SHARES];
uint32_t circs_in_share[SHARES];
int number_of_circuits, i;
double queued_cells[SHARES], time_in_queue[SHARES];
smartlist_t *processed_cells_strings, *queued_cells_strings,
*time_in_queue_strings;
@ -2494,8 +2495,8 @@ rep_hist_format_buffer_stats(time_t now)
tor_assert(now >= start_of_buffer_stats_interval);
/* Calculate deciles if we saw at least one circuit. */
memset(processed_cells, 0, SHARES * sizeof(int));
memset(circs_in_share, 0, SHARES * sizeof(int));
memset(processed_cells, 0, SHARES * sizeof(uint64_t));
memset(circs_in_share, 0, SHARES * sizeof(uint32_t));
memset(queued_cells, 0, SHARES * sizeof(double));
memset(time_in_queue, 0, SHARES * sizeof(double));
if (!circuits_for_buffer_stats)
@ -2523,8 +2524,9 @@ rep_hist_format_buffer_stats(time_t now)
time_in_queue_strings = smartlist_new();
for (i = 0; i < SHARES; i++) {
smartlist_add_asprintf(processed_cells_strings,
"%d", !circs_in_share[i] ? 0 :
processed_cells[i] / circs_in_share[i]);
U64_FORMAT, !circs_in_share[i] ? 0 :
U64_PRINTF_ARG(processed_cells[i] /
circs_in_share[i]));
}
for (i = 0; i < SHARES; i++) {
smartlist_add_asprintf(queued_cells_strings, "%.2f",