CVE-2021-47117
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47117
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47117.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47117
- Related
- Published
- 2024-03-15T21:15:06Z
- Modified
- 2024-09-18T01:00:21Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix bug on in ext4escacheextent as ext4splitextentat failed
We got follow bugon when run fsstress with injecting IO fault: [130747.323114] kernel BUG at fs/ext4/extentsstatus.c:762! [130747.323117] Internal error: Oops - BUG: 0 [#1] SMP ...... [130747.334329] Call trace: [130747.334553] ext4escacheextent+0x150/0x168 [ext4] [130747.334975] ext4cacheextents+0x64/0xe8 [ext4] [130747.335368] ext4findextent+0x300/0x330 [ext4] [130747.335759] ext4extmapblocks+0x74/0x1178 [ext4] [130747.336179] ext4mapblocks+0x2f4/0x5f0 [ext4] [130747.336567] ext4mpagereadpages+0x4a8/0x7a8 [ext4] [130747.336995] ext4readpage+0x54/0x100 [ext4] [130747.337359] genericfilebufferedread+0x410/0xae8 [130747.337767] genericfilereaditer+0x114/0x190 [130747.338152] ext4filereaditer+0x5c/0x140 [ext4] [130747.338556] _vfsread+0x11c/0x188 [130747.338851] vfsread+0x94/0x150 [130747.339110] ksysread+0x74/0xf0
This patch's modification is according to Jan Kara's suggestion in: https://patchwork.ozlabs.org/project/linux-ext4/patch/20210428085158.3728201-1-yebin10@huawei.com/ "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)."
- References
-
- https://git.kernel.org/stable/c/082cd4ec240b8734a82a89ffb890216ac98fec68
- https://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c
- https://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107
- https://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071
- https://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7
- https://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a
- https://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9
- https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb
- https://security-tracker.debian.org/tracker/CVE-2021-47117
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source