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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-63812

f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node() When __destroy_extent_node() sets the inode flag FI_NO_EXTENT, it does not reset the length of the largest extent to 0 and update the inode folio. Since modifications to the extent tree are disallowed afterward, the cached largest extent may become stale. This can trigger the following error in xfstests generic/388: F2FS-fs (dm-0): sanity_check_extent_cache: inode (ino=1761) extent info [220057, 57, 6] is incorrect, run fsck to fix In the f2fs_drop_inode path, __destroy_extent_node() does not need to guarantee that et->node_cnt is 0, because concurrency with writeback is expected in this path, and writeback may update the extent cache. This patch reverts commit ed78aeebef05 ("f2fs: fix node_cnt race between extent node destroy and writeback"), and remove the unnecessary zero check of et->node_cnt.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 42dd1c91f993431d0b399502479d00e6ad1bca71 to < 7e4d8f98be63f98856a5176b9188dada6e7ba9eeaffected
  • ab1eaf9d5c99042f5b0243bf67a06283a4c0757f to < 58a5deb220bcac4c73bf58954c0845644c997487affected
  • b0e4395870eb3441ddc959f6710b5f6ca61aff26 to < 20190e498057997532c7f186d081011f18e0a462affected
  • ed78aeebef05212ef7dca93bd931e4eff67c113f to < edf12cbeeeabe799bd2ee21fdb5c336cce6fbad7affected
  • ed78aeebef05212ef7dca93bd931e4eff67c113f to < 1f70ddb28a3c71df124da5fa4040c808116d6bb9affected
  • b00e6950da9c0e4986f6e93c875d2b9184bdb220affected
  • 0559a0e962aacbb47519e26ee663be04b72dcb92affected
  • 6.6.140 to < 6.6.144affected
  • 6.12.88 to < 6.12.95affected
  • 6.18.30 to < 6.18.38affected
  • 6.1.191 to < 6.2affected
  • 7.0.7 to < 7.1affected

Linux Linux

Default version status: affected

  • 7.1affected
  • 0 to < 7.1unaffected
  • 6.6.144 to ≤ 6.6.*unaffected
  • 6.12.95 to ≤ 6.12.*unaffected
  • 6.18.38 to ≤ 6.18.*unaffected
  • 7.1.3 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References