CVE - CVE-2021-47117

CVE-ID
CVE-2021-47117	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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/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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/082cd4ec240b8734a82a89ffb890216ac98fec68 URL:https://git.kernel.org/stable/c/082cd4ec240b8734a82a89ffb890216ac98fec68 MISC:https://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c URL:https://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c MISC:https://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107 URL:https://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107 MISC:https://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071 URL:https://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071 MISC:https://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7 URL:https://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7 MISC:https://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a URL:https://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a MISC:https://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9 URL:https://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9 MISC:https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb URL:https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb
Assigning CNA
kernel.org
Date Record Created
20240304	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240304)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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