cve-2024-40951
Vulnerability from cvelistv5
Published
2024-07-12 12:31
Modified
2024-12-19 09:08
Severity ?
EPSS score ?
0.06% (0.16368)
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger() bdev->bd_super has been removed and commit 8887b94d9322 change the usage from bdev->bd_super to b_assoc_map->host->i_sb. Since ocfs2 hasn't set bh->b_assoc_map, it will trigger NULL pointer dereference when calling into ocfs2_abort_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 ocfs2_caching_info when access journal. [joseph.qi@linux.alibaba.com: v2] Link: https://lkml.kernel.org/r/20240602112045.1112708-1-joseph.qi@linux.alibaba.com
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/67bcecd780609f471260a8c83fb0ae15f27734cePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/685d03c3795378fca6a1b3d43581f7f1a3fc095fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eb63357ef229fae061ce7ce2839d558681c42f1aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/67bcecd780609f471260a8c83fb0ae15f27734cePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/685d03c3795378fca6a1b3d43581f7f1a3fc095fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/eb63357ef229fae061ce7ce2839d558681c42f1aPatch
Impacted products
Vendor Product Version
Linux Linux Version: 8887b94d93224e0ef7e1bc6369640e313b8b12f4
Version: 8887b94d93224e0ef7e1bc6369640e313b8b12f4
Version: 8887b94d93224e0ef7e1bc6369640e313b8b12f4
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   Linux Linux Version: 6.6
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