| commit | 1f05324cbe92a7dde71f44dc740eb8240539746f | [log] [tgz] |
|---|---|---|
| author | Olivier Houchard <cognet@ci0.org> | Wed Nov 25 20:38:00 2020 +0100 |
| committer | Willy Tarreau <w@1wt.eu> | Mon Nov 30 18:17:29 2020 +0100 |
| tree | be1b9f5aff5fb2feab17a4c5ae14c678af676d65 | |
| parent | 8a069eb9a4b34e48ea41ac0e270cd2ccbd6fe3e8 [diff] |
BUG/MEDIUM: lists: Lock the element while we check if it is in a list. In MT_LIST_TRY_ADDQ() and MT_LIST_TRY_ADD() we can't just check if the element is already in a list, because there's a small race condition, it could be added between the time we checked, and the time we actually set its next and prev, so we have to lock it first. This is required to address issue #958. This should be backported to 2.3, 2.2 and 2.1.