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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.
[[email protected]: v2]
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Ubuntu | — | Upgrade linux-image-6.8.0-45-generic-64kUpgrade linux-image-6.8.0-1015-awsUpgrade linux-image-6.8.0-1012-ibmUpgrade linux-image-6.8.0-1014-gcpUpgrade linux-image-raspiUpgrade linux-image-6.8.0-44-lowlatency-64kUpgrade linux-image-6.8.0-1012-oracleUpgrade linux-image-6.8.0-1011-raspiUpgrade linux-image-gkeUpgrade linux-image-generic-64kUpgrade linux-image-genericUpgrade linux-image-6.8.0-1013-nvidiaUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1013-nvidia-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-1013-nvidia-lowlatency-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-44-genericUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-44-lowlatencyUpgrade linux-image-ibmUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1012-oemUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.8.0-1012-oracle-64kUpgrade linux-image-azureUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-lowlatencyUpgrade linux-image-virtualUpgrade linux-image-nvidiaUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-gcpUpgrade linux-image-oem-22.04bUpgrade linux-image-awsUpgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1013-nvidia-64kUpgrade linux-image-6.8.0-45-genericUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1014-azureUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1014-azure-fdeUpgrade linux-image-kvmUpgrade linux-image-6.8.0-1010-gkeUpgrade linux-image-oracleUpgrade linux-image-azure-fdeUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-44-generic-64k | Sep 12, 2024 | Jul 12, 2024 |
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