This is a note to let you know that I've just added the patch titled
wireguard: ratelimiter: disable timings test by default
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wireguard-ratelimiter-disable-timings-test-by-defaul.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 01909334194ca9e5e6152024ce8a8f1c09963367
Author: Jason A. Donenfeld <Jason@xxxxxxxxx>
Date: Fri Sep 16 15:37:38 2022 +0100
wireguard: ratelimiter: disable timings test by default
[ Upstream commit 684dec3cf45da2b0848298efae4adf3b2aeafeda ]
A previous commit tried to make the ratelimiter timings test more
reliable but in the process made it less reliable on other
configurations. This is an impossible problem to solve without
increasingly ridiculous heuristics. And it's not even a problem that
actually needs to be solved in any comprehensive way, since this is only
ever used during development. So just cordon this off with a DEBUG_
ifdef, just like we do for the trie's randomized tests, so it can be
enabled while hacking on the code, and otherwise disabled in CI. In the
process we also revert 151c8e499f47.
Fixes: 151c8e499f47 ("wireguard: ratelimiter: use hrtimer in selftest")
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireguard/selftest/ratelimiter.c b/drivers/net/wireguard/selftest/ratelimiter.c
index ba87d294604f..d4bb40a695ab 100644
--- a/drivers/net/wireguard/selftest/ratelimiter.c
+++ b/drivers/net/wireguard/selftest/ratelimiter.c
@@ -6,29 +6,28 @@
#ifdef DEBUG
#include <linux/jiffies.h>
-#include <linux/hrtimer.h>
static const struct {
bool result;
- u64 nsec_to_sleep_before;
+ unsigned int msec_to_sleep_before;
} expected_results[] __initconst = {
[0 ... PACKETS_BURSTABLE - 1] = { true, 0 },
[PACKETS_BURSTABLE] = { false, 0 },
- [PACKETS_BURSTABLE + 1] = { true, NSEC_PER_SEC / PACKETS_PER_SECOND },
+ [PACKETS_BURSTABLE + 1] = { true, MSEC_PER_SEC / PACKETS_PER_SECOND },
[PACKETS_BURSTABLE + 2] = { false, 0 },
- [PACKETS_BURSTABLE + 3] = { true, (NSEC_PER_SEC / PACKETS_PER_SECOND) * 2 },
+ [PACKETS_BURSTABLE + 3] = { true, (MSEC_PER_SEC / PACKETS_PER_SECOND) * 2 },
[PACKETS_BURSTABLE + 4] = { true, 0 },
[PACKETS_BURSTABLE + 5] = { false, 0 }
};
static __init unsigned int maximum_jiffies_at_index(int index)
{
- u64 total_nsecs = 2 * NSEC_PER_SEC / PACKETS_PER_SECOND / 3;
+ unsigned int total_msecs = 2 * MSEC_PER_SEC / PACKETS_PER_SECOND / 3;
int i;
for (i = 0; i <= index; ++i)
- total_nsecs += expected_results[i].nsec_to_sleep_before;
- return nsecs_to_jiffies(total_nsecs);
+ total_msecs += expected_results[i].msec_to_sleep_before;
+ return msecs_to_jiffies(total_msecs);
}
static __init int timings_test(struct sk_buff *skb4, struct iphdr *hdr4,
@@ -43,12 +42,8 @@ static __init int timings_test(struct sk_buff *skb4, struct iphdr *hdr4,
loop_start_time = jiffies;
for (i = 0; i < ARRAY_SIZE(expected_results); ++i) {
- if (expected_results[i].nsec_to_sleep_before) {
- ktime_t timeout = ktime_add(ktime_add_ns(ktime_get_coarse_boottime(), TICK_NSEC * 4 / 3),
- ns_to_ktime(expected_results[i].nsec_to_sleep_before));
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_hrtimeout_range_clock(&timeout, 0, HRTIMER_MODE_ABS, CLOCK_BOOTTIME);
- }
+ if (expected_results[i].msec_to_sleep_before)
+ msleep(expected_results[i].msec_to_sleep_before);
if (time_is_before_jiffies(loop_start_time +
maximum_jiffies_at_index(i)))
@@ -132,7 +127,7 @@ bool __init wg_ratelimiter_selftest(void)
if (IS_ENABLED(CONFIG_KASAN) || IS_ENABLED(CONFIG_UBSAN))
return true;
- BUILD_BUG_ON(NSEC_PER_SEC % PACKETS_PER_SECOND != 0);
+ BUILD_BUG_ON(MSEC_PER_SEC % PACKETS_PER_SECOND != 0);
if (wg_ratelimiter_init())
goto out;
@@ -172,7 +167,7 @@ bool __init wg_ratelimiter_selftest(void)
++test;
#endif
- for (trials = TRIALS_BEFORE_GIVING_UP;;) {
+ for (trials = TRIALS_BEFORE_GIVING_UP; IS_ENABLED(DEBUG_RATELIMITER_TIMINGS);) {
int test_count = 0, ret;
ret = timings_test(skb4, hdr4, skb6, hdr6, &test_count);
