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BUG/MEDIUM: lua: fix wakeup condition from sleep()

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A time comparison was wrong in hlua_sleep_yield(), making the sleep()
code do nothing for periods of 24 days every 49 days. An arithmetic
comparison was performed on now_ms instead of using tick_is_expired().

This bug was added in 1.6-dev by commit 5b8608f1e ("MINOR: lua: core:
add sleep functions") so the fix should be backported to all stable
versions.
This commit is contained in:
Willy Tarreau 2021-09-30 16:12:31 +02:00
parent 8d264387c3
commit 12c02701d3
1 changed files with 1 additions and 1 deletions
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2
src/hlua.c
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@ -8052,7 +8052,7 @@ __LJMP static int hlua_log_alert(lua_State *L)
__LJMP static int hlua_sleep_yield(lua_State *L, int status, lua_KContext ctx)
{
int wakeup_ms = lua_tointeger(L, -1);
if (now_ms < wakeup_ms)
if (!tick_is_expired(wakeup_ms, now_ms))
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_sleep_yield, wakeup_ms, 0));
return 0;
}