Bug 1876839

Summary: smbd share mode double free crash - memcache_trim bug
Product: Red Hat Enterprise Linux 7 Reporter: mpanaous
Component: sambaAssignee: Andreas Schneider <asn>
Status: CLOSED ERRATA QA Contact: sssd-qe <sssd-qe>
Severity: high Docs Contact:
Priority: high    
Version: 7.8CC: arajendr, asakure, asn, dkarpele, gdeschner, jarrpa, mescanfe, nsoman, pcech, rik.theys, thalman, tscherf
Target Milestone: rcKeywords: Triaged
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: samba-4.10.16-12.el7_9 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
: 1924615 (view as bug list) Environment:
Last Closed: 2021-03-16 13:50:08 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:
Bug Depends On:    
Bug Blocks: 1924615    

Comment 7 Andreas Schneider 2020-09-11 13:12:45 UTC 
If the provided test package fixes the issue. Then we would like to fix this crash bug in the next zstream release. The change is only changing the parent memory context where the share mode lock is allocated. We should use the fsp (file struct pointer) as it is long lived and we free the lock anyway.
Comment 24 Andreas Schneider 2021-02-02 13:39:33 UTC 
Workaround:

Set 'max stat cache size = 1024' in the [global] section of the smb.conf!
Comment 32 errata-xmlrpc 2021-03-16 13:50:08 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 (samba bug fix and enhancement 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/RHBA-2021:0855