- **status**: review --> fixed
- **Comment**:
commit eb24877a84905aa5d72b9551764c271c8b3bd24e (HEAD -> develop,
origin/develop)
Author: khuonglb <[email protected]>
Date: Wed Oct 1 15:51:31 2025 +0700
ntfd: prevent coredump on null client during notification [#3359]
ntfd could crash when a notification was processed after client was removed.
Leaving a null client pointer and causing a null pointer dereference
Check for a null client before handling notifications and return early.
---
**[tickets:#3359] ntf: fix ntfd coredump**
**Status:** fixed
**Milestone:** 5.25.09
**Created:** Thu Sep 05, 2024 07:25 AM UTC by Khuong Ba Le
**Last Updated:** Wed Jan 07, 2026 08:40 AM UTC
**Owner:** Khuong Ba Le
Coredump happens when try to access to a null pointer in ntfd.
~~~
BT ###
#0 0x0000558e5506a000 in NtfClient::getMdsDest() const ()
#1 0x0000558e55072213 in NtfAdmin::processNotification(unsigned int,
SaNtfNotificationTypeT, ntfsv_send_not_req*, mds_sync_snd_ctxt*, unsigned long
long) ()
#2 0x0000558e55072487 in NtfAdmin::notificationReceived(unsigned int,
SaNtfNotificationTypeT, ntfsv_send_not_req*, mds_sync_snd_ctxt*) ()
#3 0x0000558e5505805f in ?? ()
#4 0x0000558e55058844 in ?? ()
#5 0x0000558e55058c2b in ntfs_process_mbx ()
#6 0x0000558e55056637 in main ()
~~~
Step Reproduce:
1. Simulate nfs hang to make the ntf buffer full.
2. Client send many notifications to server.
3. Reboot all client to simulate client down while sending ntf.
* Recommend: using a cluster with multiple node payloads to simulate numerous
clients sending notifications simultaneously. This will increase the likelihood
of overload, thereby raising the chances of encountering a core dump.
---
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