| Summary: | high CPU load followed by segfault | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Jan Včelák <jv+fedora> |
| Component: | pcsc-lite-ccid | Assignee: | Nikos Mavrogiannopoulos <nmavrogi> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 24 | CC: | klember, ludovic.rousseau+fedoraproject, ludovic.rousseau, nmavrogi, rrelyea |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | pcsc-lite-ccid-1.4.23-1.fc24 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-05-07 11:54:21 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: | |
I think it is a known bug of the CCID driver. It has been fixed in CCID version 1.4.23 https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=pcsclite/CCID.git;a=blob;f=README;hb=HEAD#l137 Thank you Ludovic. I'll make an update for testing as soon. pcsc-lite-ccid-1.4.23-1.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-d1a9720b27 pcsc-lite-ccid-1.4.23-1.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-d1a9720b27 pcsc-lite-ccid-1.4.23-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report. |
Description of problem: After a while, the pcscd daemon causes high CPU load and then randomly crashes. First time I noticed the high load after about an half an hour. The second time, the load went up and I the daemon crashed before I started investigating what could be wrong. This problem appeared after upgrading to Fedora 24. The following log entries look related: Apr 25 13:19:11 basbombardon pcscd[10460]: 99999999 commands.c:1094:CmdPowerOff Card absent or mute Apr 25 13:19:12 basbombardon audit[10465]: ANOM_ABEND auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:pcscd_t:s0 pid=10465 comm="pcscd" exe="/usr/sbin/pcscd" sig=11 Apr 25 13:19:12 basbombardon kernel: show_signal_msg: 153 callbacks suppressed Apr 25 13:19:12 basbombardon kernel: pcscd[10465]: segfault at 7f2e7da229f1 ip 00007f2e7da229f1 sp 00007f2e7da11d90 error 14 in libgpg-error.so.0.17.0[7f2e7de48000+14000] Apr 25 13:19:12 basbombardon systemd[1]: pcscd.service: Main process exited, code=killed, status=11/SEGV Apr 25 13:19:12 basbombardon systemd[1]: pcscd.service: Unit entered failed state. When the daemon was spinning the CPU, the strace indicated that the daemon was looping on the poll() call. I guess the poll() result handling in the daemon is incorrect: [pid 10465] recvmsg(11, 0x7f2e7da0fc50, 0) = -1 EAGAIN (Resource temporarily unavailable) [pid 10465] poll([{fd=6, events=POLLIN}, {fd=5, events=POLLIN}], 2, -1) = 1 ([{fd=5, revents=POLLIN}]) [pid 10465] recvmsg(11, 0x7f2e7da0fc50, 0) = -1 EAGAIN (Resource temporarily unavailable) [pid 10465] poll([{fd=6, events=POLLIN}, {fd=5, events=POLLIN}], 2, -1) = 1 ([{fd=5, revents=POLLIN}]) [pid 10465] recvmsg(11, 0x7f2e7da0fc50, 0) = -1 EAGAIN (Resource temporarily unavailable) [pid 10465] poll([{fd=6, events=POLLIN}, {fd=5, events=POLLIN}], 2, -1) = 1 ([{fd=5, revents=POLLIN}]) ... How reproducible: always Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: I use opensc PKCS #11 module in ssh-agent for authentication using Yubikey. It might be related. The token session was opened always when this problem appeared.