Bug 1884236
| Summary: | gensnippet_if segfaults on fcos 32.20200923.2.0 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Sanne Raymaekers <sraymaek> | ||||||||
| Component: | console-login-helper-messages | Assignee: | Kelvin Fan <kfan> | ||||||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||||
| Severity: | unspecified | Docs Contact: | |||||||||
| Priority: | unspecified | ||||||||||
| Version: | 32 | CC: | admiller, dustymabe, jlebon, kasal, kdudka, kfan, robertthomasfairley, ssbarnea, svashisht | ||||||||
| Target Milestone: | --- | ||||||||||
| Target Release: | --- | ||||||||||
| Hardware: | Unspecified | ||||||||||
| OS: | Unspecified | ||||||||||
| Whiteboard: | |||||||||||
| Fixed In Version: | console-login-helper-messages-0.20.1-1.fc32 | Doc Type: | If docs needed, set a value | ||||||||
| Doc Text: | Story Points: | --- | |||||||||
| Clone Of: | Environment: | ||||||||||
| Last Closed: | 2020-10-10 21:58:23 UTC | Type: | Bug | ||||||||
| Regression: | --- | Mount Type: | --- | ||||||||
| Documentation: | --- | CRM: | |||||||||
| Verified Versions: | Category: | --- | |||||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||||
| Embargoed: | |||||||||||
| Attachments: |
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Since it's not a lot of data I'm just going to copy the error message here:
```
kernel: gensnippet_if[1019]: segfault at 7ffc52d82bd0 ip 00005591c33f4531 sp 00007ffc52d82b90 error 6 in bash[5591c33e7000+b6000]
kernel: audit: type=1701 audit(1601553177.676:303): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:initrc_t:s0 pid=1019 comm="gensnippet_if" exe="/usr/bin/bash" sig=11 res=1
audit[1019]: ANOM_ABEND auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:initrc_t:s0 pid=1019 comm="gensnippet_if" exe="/usr/bin/bash" sig=11 res=1
systemd-coredump[4789]: Resource limits disable core dumping for process 1019 (gensnippet_if).
systemd-coredump[4789]: Process 1019 (gensnippet_if) of user 0 dumped core.
nm-dispatcher[1018]: /etc/NetworkManager/dispatcher.d/90-console-login-helper-messages-gensnippet_if: line 13: 1019 Segmentation fault (core dumped) /usr/libexec/console-login-helper-messages/gensnippet_if "${interface}" "${action}"
```
Hmm, this looks like bash itself is getting a SIGSEGV? Or I guess it's possible that something is explictly sending a `SIGSEGV` to us. A coredump would help differentiate I think. @Sanne, could you try to get a coredump from bash? From the logs it looks like it might be limited (what does `ulimit -c` say?). Sorry, I didn't mean to change component on this just yet. We can keep this under c-l-h-m until we have more info. Created attachment 1718204 [details]
full journal
Created attachment 1718205 [details]
coredump
I added the full journal and ran it again without coredump limits. It does seem that bash itself crashes? I think it is indeed a problem with console-login-helper-messages. gensnippet_if contains a recursive call that is probably overflowing the stack. In bash, infinite recursion in a function call does cause a segmentation fault. FEDORA-2020-6a8030eeee has been submitted as an update to Fedora 32. https://bodhi.fedoraproject.org/updates/FEDORA-2020-6a8030eeee FEDORA-2020-6a8030eeee has been pushed to the Fedora 32 testing repository. In short time you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-6a8030eeee` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-6a8030eeee See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2020-6a8030eeee has been pushed to the Fedora 32 stable repository. If problem still persists, please make note of it in this bug report. |
Created attachment 1718160 [details] journal excerpt Description of problem: /usr/bin/libexec/gensnippet_f segfaults, I'm not sure why however. Encountered on a machine that is offline, and consequently starts the cockpit/ws container (with podman). However it seems to happen when starting any container, even with network access. Version-Release number of selected component (if applicable): State: idle Deployments: ● ostree://fedora:fedora/x86_64/coreos/testing Version: 32.20200923.2.0 (2020-09-24T14:57:37Z) BaseCommit: 3c833a0ce8f9319e6a994e18dcb1d3d540a84c14b609bd1ddd9ed108ed93aa42 GPGSignature: Valid signature by 97A1AE57C3A2372CCA3A4ABA6C13026D12C944D0 LayeredPackages: dnsmasq LocalPackages: cockpit-tests-229.3.g04e6398d4-1.wip.fc32.x86_64 cockpit-bridge-229.3.g04e6398d4-1.wip.fc32.x86_64 cockpit-dashboard-229.3.g04e6398d4-1.wip.fc32.noarch cockpit-networkmanager-229.3.g04e6398d4-1.wip.fc32.noarch cockpit-system-229.3.g04e6398d4-1.wip.fc32.noarch ostree://fedora:fedora/x86_64/coreos/testing Version: 32.20200923.2.0 (2020-09-24T14:57:37Z) BaseCommit: 3c833a0ce8f9319e6a994e18dcb1d3d540a84c14b609bd1ddd9ed108ed93aa42 GPGSignature: Valid signature by 97A1AE57C3A2372CCA3A4ABA6C13026D12C944D0 LayeredPackages: cockpit-bridge cockpit-networkmanager cockpit-system dnsmasq Reproduce: 1. Pull a container, say fedora 2. Run it, podman will add an interface 3. gensnippet_if crashes