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)."
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernel-tools-debuginfoUpgrade bpftool-debuginfoUpgrade python-perfUpgrade kernel-toolsUpgrade bpftoolUpgrade python-perf-debuginfoUpgrade kernelUpgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade perfUpgrade kernel-develUpgrade kernel-livepatch-4.14.238-182.421Upgrade perf-debuginfo | 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-docsUpgrade kernel-defaultUpgrade kernel-syms-azureUpgrade kernel-default-manUpgrade kernel-zfcpdumpUpgrade kernel-macrosUpgrade kernel-azure-develUpgrade kernel-symsUpgrade kernel-64kb-develUpgrade kernel-devel-azureUpgrade kernel-default-baseUpgrade kernel-default-extraUpgrade kernel-sourceUpgrade kernel-default-develUpgrade kernel-azure-baseUpgrade kernel-64kbUpgrade kernel-azureUpgrade kernel-develUpgrade kernel-preempt-develUpgrade reiserfs-kmp-defaultUpgrade kernel-obs-buildUpgrade kernel-source-azureUpgrade kernel-preempt | Aug 9, 2024 | Mar 15, 2024 |
| Ubuntu | — | Upgrade linux-image-lowlatencyUpgrade linux-image-4.4.0-1157-kvmUpgrade linux-image-4.4.0-283-genericUpgrade linux-image-generic-lts-xenialUpgrade linux-image-4.4.0-1156-awsUpgrade linux-image-virtualUpgrade linux-image-4.4.0-1126-fipsUpgrade linux-image-fipsUpgrade linux-image-genericUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-kvmUpgrade linux-image-awsUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-4.4.0-283-lowlatencyUpgrade linux-image-4.4.0-1194-aws | Nov 19, 2024 | Mar 15, 2024 |
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