In the Linux kernel, the following vulnerability has been resolved:
ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed
We got follow bug_on when run fsstress with injecting IO fault: [130747.323114] kernel BUG at fs/ext4/extents_status.c:762! [130747.323117] Internal error: Oops - BUG: 0 [#1] SMP ...... [130747.334329] Call trace: [130747.334553] ext4_es_cache_extent+0x150/0x168 [ext4] [130747.334975] ext4_cache_extents+0x64/0xe8 [ext4] [130747.335368] ext4_find_extent+0x300/0x330 [ext4] [130747.335759] ext4_ext_map_blocks+0x74/0x1178 [ext4] [130747.336179] ext4_map_blocks+0x2f4/0x5f0 [ext4] [130747.336567] ext4_mpage_readpages+0x4a8/0x7a8 [ext4] [130747.336995] ext4_readpage+0x54/0x100 [ext4] [130747.337359] generic_file_buffered_read+0x410/0xae8 [130747.337767] generic_file_read_iter+0x114/0x190 [130747.338152] ext4_file_read_iter+0x5c/0x140 [ext4] [130747.338556] __vfs_read+0x11c/0x188 [130747.338851] vfs_read+0x94/0x150 [130747.339110] ksys_read+0x74/0xf0
This patch's modification is according to Jan Kara's suggestion in: https://patchwork.ozlabs.org/project/linux-ext4/patch/[email protected]/ "I see. Now I understand your patch. Honestly, seeing how fragile is trying to fix extent tree after split has failed in the middle, I would probably go even further and make sure we fix the tree properly in case of ENOSPC and EDQUOT (those are easily user triggerable). Anything else indicates a HW problem or fs corruption so I'd rather leave the extent tree as is and don't try to fix it (which also means we will not create overlapping extents)."
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-develUpgrade perfUpgrade kernel-develUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernelUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-4.14.238-182.421Upgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernel-toolsUpgrade python-perf | Aug 2, 2024 | Mar 15, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Mar 15, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 15, 2024 |
| Suse | — | Upgrade kernel-symsUpgrade kernel-default-manUpgrade kernel-devel-azureUpgrade kernel-default-extraUpgrade kernel-zfcpdumpUpgrade kernel-macrosUpgrade kernel-defaultUpgrade kernel-syms-azureUpgrade kernel-docsUpgrade kernel-64kb-develUpgrade kernel-azure-develUpgrade kernel-default-baseUpgrade kernel-source-azureUpgrade kernel-develUpgrade kernel-64kbUpgrade kernel-preempt-develUpgrade kernel-obs-buildUpgrade reiserfs-kmp-defaultUpgrade kernel-preemptUpgrade kernel-sourceUpgrade kernel-azure-baseUpgrade kernel-azureUpgrade kernel-default-devel | Aug 9, 2024 | Mar 15, 2024 |
| Ubuntu | — | Upgrade linux-image-kvmUpgrade linux-image-4.4.0-1194-awsUpgrade linux-image-awsUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-4.4.0-283-lowlatencyUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-4.4.0-1156-awsUpgrade linux-image-virtualUpgrade linux-image-generic-lts-xenialUpgrade linux-image-4.4.0-1157-kvmUpgrade linux-image-lowlatencyUpgrade linux-image-fipsUpgrade linux-image-genericUpgrade linux-image-4.4.0-1126-fipsUpgrade linux-image-4.4.0-283-generic | Nov 19, 2024 | Mar 15, 2024 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub