CVE-2024-40951
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-40951
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-40951.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-40951
- Downstream
- Published
- 2024-07-12T12:31:55Z
- Modified
- 2025-10-21T23:51:57.708697Z
- Summary
- ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ocfs2: fix NULL pointer dereference in ocfs2aborttrigger()
bdev->bdsuper has been removed and commit 8887b94d9322 change the usage from bdev->bdsuper to bassocmap->host->isb. Since ocfs2 hasn't set bh->bassocmap, it will trigger NULL pointer dereference when calling into ocfs2abort_trigger().
Actually this was pointed out in history, see commit 74e364ad1b13. But I've made a mistake when reviewing commit 8887b94d9322 and then re-introduce this regression.
Since we cannot revive bdev in buffer head, so fix this issue by initializing all types of ocfs2 triggers when fill super, and then get the specific ocfs2 trigger from ocfs2cachinginfo when access journal.
[joseph.qi@linux.alibaba.com: v2]
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8887b94d93224e0ef7e1bc6369640e313b8b12f4Fixed67bcecd780609f471260a8c83fb0ae15f27734ce
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8887b94d93224e0ef7e1bc6369640e313b8b12f4Fixedeb63357ef229fae061ce7ce2839d558681c42f1a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8887b94d93224e0ef7e1bc6369640e313b8b12f4Fixed685d03c3795378fca6a1b3d43581f7f1a3fc095f