[sr-dev] [kamailio/kamailio] textops: properly initialize new tr_param_t object (#1506)

Just `memset()` this to `0`. Without this kamailio segfaults when running `fparam_free_restore()` on a variable that contains transformations immediately after creation, because field `next` of the transformation contains garbage. In my case this was variable which contained `re.subst` transformation. And below is the top of the backtrace. ``` #0 0x00000000005cba17 in tr_param_free (tp=0x292873257325203a) at core/pvapi.c:1804 #1 0x00000000005cb677 in tr_destroy (t=0x7f6387ed0c40) at core/pvapi.c:1742 #2 0x00000000005cb9c1 in tr_free (t=0x0) at core/pvapi.c:1786 #3 0x00000000005ca194 in pv_spec_destroy (spec=0x7f6387ed0b80) at core/pvapi.c:1570 #4 0x00000000005ca1b7 in pv_spec_free (spec=0x7f6387ed0b80) at core/pvapi.c:1578 #5 0x0000000000541820 in fparam_free_contents (fp=0x7f6387ed0ae0) at core/sr_module.c:1334 #6 0x0000000000541898 in fparam_free_restore (param=0x7f6387ed1168) at core/sr_module.c:1364 ``` <!-- Kamailio Pull Request Template --> <!-- IMPORTANT: - for detailed contributing guidelines, read: https://github.com/kamailio/kamailio/blob/master/.github/CONTRIBUTING.md - pull requests must be done to master branch, unless they are backports of fixes from master branch to a stable branch - backports to stable branches must be done with 'git cherry-pick -x ...' - code is contributed under BSD for core and main components (tm, sl, auth, tls) - code is contributed GPLv2 or a compatible license for the other components - GPL code is contributed with OpenSSL licensing exception --> #### Pre-Submission Checklist <!-- Go over all points below, and after creating the PR, tick all the checkboxes that apply --> <!-- All points should be verified, otherwise, read the CONTRIBUTING guidelines from above--> <!-- If you're unsure about any of these, don't hesitate to ask on sr-dev mailing list --> - [ ] Commit message has the format required by CONTRIBUTING guide - [ ] Commits are split per component (core, individual modules, libs, utils, ...) - [ ] Each component has a single commit (if not, squash them into one commit) - [ ] No commits to README files for modules (changes must be done to docbook files in `doc/` subfolder, the README file is autogenerated) #### Type Of Change - [x] Small bug fix (non-breaking change which fixes an issue) - [ ] New feature (non-breaking change which adds new functionality) - [ ] Breaking change (fix or feature that would change existing functionality) #### Checklist: <!-- Go over all points below, and after creating the PR, tick the checkboxes that apply --> - [ ] PR should be backported to stable branches - [ ] Tested changes locally - [ ] Related to issue #XXXX (replace XXXX with an open issue number) #### Description <!-- Describe your changes in detail --> You can view, comment on, or merge this pull request online at: https://github.com/kamailio/kamailio/pull/1506 -- Commit Summary -- * properly initialize new tr_param_t object -- File Changes -- M src/modules/textops/txt_var.c (1) -- Patch Links -- https://github.com/kamailio/kamailio/pull/1506.patch https://github.com/kamailio/kamailio/pull/1506.diff -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/pull/1506