Bug 1460689
| Summary: | KCM/secrets: Storing many secrets in a rapid succession segfaults the secrets responder | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Jakub Hrozek <jhrozek> |
| Component: | sssd | Assignee: | SSSD Maintainers <sssd-maint> |
| Status: | CLOSED ERRATA | QA Contact: | Amith <apeetham> |
| Severity: | unspecified | Docs Contact: | Aneta Šteflová Petrová <apetrova> |
| Priority: | unspecified | ||
| Version: | 7.3 | CC: | apeetham, apetrova, fidencio, grajaiya, jhrozek, lslebodn, mkosek, mzidek, pasik, pbrezina, sgoveas, tscherf |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | sssd-1.16.0-1.el7 | Doc Type: | Known Issue |
| Doc Text: |
The *sssd-secrets* component crashes when it is under load
When the *sssd-secrets* component receives many requests, the situation triggers a bug in the Network Security Services (NSS) library that causes *sssd-secrets* to terminate unexpectedly. However, the *systemd* service restarts *sssd-secrets* for the next request, which means that the denial of service is only temporary.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-04-10 17:11:33 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Jakub Hrozek
2017-06-12 12:15:58 UTC
master: * a6f606117e5cfe64c4b49f94e514bf82054716d3 To reproduce and verify: see comment #0. Verified the bug on SSSD Version : sssd-1.16.0-14.el7.x86_64
Steps followed during verification:
1. Reproduce the issue with older sssd build : sssd-1.15.2-50.el7.x86_64.
2. Configure KCM + Secrets in SSSD.CONF
[sssd]
config_file_version = 2
sbus_timeout = 30
services = nss, pam
domains = LDAP-KRB5
[nss]
debug_level = 0xFFF0
[pam]
[secrets]
debug_level = 0xFFF0
provider = local
[domain/LDAP-KRB5]
debug_level=0xFFF0
id_provider = ldap
ldap_uri = ldap://SERVER
ldap_search_base = dc=example,dc=com
auth_provider = krb5
krb5_server = KRB-SERVER
krb5_realm = EXAMPLE.COM
3. Create a for loop which executes kinit for over 200 times. Login as test user and execute the following script.
for i in {1..100}; do
echo "Loop $i"
echo Secret123 | kinit
done
4. In the case of old sssd build sssd-1.15.2-50.el7.x86_64, you will see following error around loop 69:
Loop 69
Password for user_ssftest1:
kinit: Failed to store credentials: Internal credentials cache error while getting initial credentials
5. Monitor the "sssd-secrets.service" status. You will see that the process for sssd_secrets restarts and Main PID changes.
6. In the case of latest sssd build on RHEL-7.5, the test remains consistent without any error. The sssd_secrets process looks stable.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2018:0929 |