Bug 2300517 (CVE-2024-42079)

Summary: CVE-2024-42079 kernel: gfs2: Fix NULL pointer dereference in gfs2_log_flush
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 6.6.37, kernel 6.9.8, kernel 6.10 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
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: 2301716    
Bug Blocks:    

Description OSIDB Bzimport 2024-07-29 16:28:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

gfs2: Fix NULL pointer dereference in gfs2_log_flush

In gfs2_jindex_free(), set sdp->sd_jdesc to NULL under the log flush
lock to provide exclusion against gfs2_log_flush().

In gfs2_log_flush(), check if sdp->sd_jdesc is non-NULL before
dereferencing it.  Otherwise, we could run into a NULL pointer
dereference when outstanding glock work races with an unmount
(glock_work_func -> run_queue -> do_xmote -> inode_go_sync ->
gfs2_log_flush).
Comment 1 Mauro Matteo Cascella 2024-07-30 16:54:37 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024072955-CVE-2024-42079-a13c@gregkh/T
Comment 2 Mauro Matteo Cascella 2024-07-30 16:54:58 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2301716]
Comment 11 errata-xmlrpc 2024-10-16 00:51:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:8162 https://access.redhat.com/errata/RHSA-2024:8162
Comment 13 errata-xmlrpc 2024-11-05 00:50:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:8870 https://access.redhat.com/errata/RHSA-2024:8870
Comment 14 errata-xmlrpc 2024-11-05 01:10:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:8856 https://access.redhat.com/errata/RHSA-2024:8856