CVE-2024-42079: gfs2: Fix NULL pointer dereference in gfs2_log_flush
First published: Mon Jul 29 2024(Updated: )
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).
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.6.37 | |
| Linux Linux kernel | >=6.7<6.9.8 | |
| redhat/kernel | <6.6.37 | 6.6.37 |
| redhat/kernel | <6.9.8 | 6.9.8 |
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.115-1<=6.1.112-1 | 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116ce
- https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828
- https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6ef
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-42079
- https://nvd.nist.gov/vuln/detail/CVE-2024-42079
- https://launchpad.net/bugs/cve/CVE-2024-42079
- https://security-tracker.debian.org/tracker/CVE-2024-42079
- https://ubuntu.com/security/CVE-2024-42079
- https://git.kernel.org/linus/35264909e9d1973ab9aaa2a1b07cda70f12bb828
- https://lore.kernel.org/linux-cve-announce/2024072955-CVE-2024-42079-a13c@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2301716
- https://access.redhat.com/errata/RHSA-2024:8162
- https://access.redhat.com/errata/RHSA-2024:8870
- https://access.redhat.com/errata/RHSA-2024:8856
- https://bugzilla.redhat.com/show_bug.cgi?id=2300517
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