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Bug 2126714 - Multipath segfault after running newest patched version
Summary: Multipath segfault after running newest patched version
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: device-mapper-multipath
Version: 8.2
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Ben Marzinski
QA Contact: Lin Li
URL:
Whiteboard:
Depends On:
Blocks: 2161393 2161394 2161395 2161396
TreeView+ depends on / blocked
 
Reported: 2022-09-14 10:12 UTC by ggrimaux
Modified: 2023-07-29 11:56 UTC (History)
11 users (show)

Fixed In Version: device-mapper-multipath-0.8.4-34.el8
Doc Type: Bug Fix
Doc Text:
Cause: When paths were removed, multipathd could free the array of matching device config entries for a multipath device, while the device still pointed to it Consequence: multipathd could occasionally crash after path removal Fix: multipathd now makes sure that the device config list no longer points to freed memory. Result: multipathd not longer crashes after path removal
Clone Of:
: 2161393 2161394 2161395 2161396 (view as bug list)
Environment:
Last Closed: 2023-05-16 08:44:49 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-133919 0 None None None 2022-09-14 10:27:26 UTC
Red Hat Product Errata RHSA-2023:2948 0 None None None 2023-05-16 08:45:27 UTC

Description ggrimaux 2022-09-14 10:12:45 UTC 
Description of problem:
Client recently updated their RHEL8.2 with this version of multipathd:
https://bugzilla.redhat.com/show_bug.cgi?id=1946940
https://bugzilla.redhat.com/show_bug.cgi?id=2101534

Its installed on many nodes and it just crashed with this:
Sep 13 15:06:25 compute kernel: multipathd[585455]: segfault at 4449 ip 00007fb44d96ea2e sp 00007fb44dd247b8 error 4 in libmultipath.so.0[7fb44d92d000+5c000]
Sep 13 15:06:25 compute kernel: Code: 66 90 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 85 ff 74 06 31 c0 66 89 47 14 c3 f3 0f 1e fa 48 85 f6 74 17 48 85 d2 74 05 <80> 3a 00 75 15 48 c7 06 00 00 00 00 c3 0f 1f 44 00 00 c3 0f 1f 80
Sep 13 15:06:25 compute systemd[1]: multipathd.service: Main process exited, code=killed, status=11/SEGV
Sep 13 15:06:25 compute systemd[1]: multipathd.service: Failed with result 'signal'.

We need your help to see if its related to this new patch/version or its a new issue entirely

Thank you.

Version-Release number of selected component (if applicable):
RHEL8.2
device-mapper-multipath-0.8.3-3.el8_2.5.x86_64              Tue Sep  6 09:35:35 2022
device-mapper-multipath-libs-0.8.3-3.el8_2.5.x86_64         Tue Sep  6 09:35:34 2022


How reproducible:
Happened once so far

Steps to Reproduce:
1. N/A
2.
3.

Actual results:
multipathd crashed

Expected results:
multipathd doesn't crash

Additional info:
We have sosreport from the node where the crash happened
Comment 2 Ben Marzinski 2022-09-14 15:59:22 UTC 
You don't happen to have the coredump, do you? This will be much easier to debug if I can see the state it was in when it crashed.
Comment 3 Ben Marzinski 2022-09-14 17:09:23 UTC 
It might also be useful to have the device-mapper-multipath-debuginfo package installed.
Comment 29 errata-xmlrpc 2023-05-16 08:44:49 UTC 
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 (Moderate: device-mapper-multipath security and bug fix update), 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/RHSA-2023:2948
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