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In the Linux kernel, the following vulnerability has been resolved: f2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs() When we mount… (CVE-2026-68459)

0
Medium
Published: 08/15/2026 (08/15/2026, 06:18:00 UTC)
Source: GCVE Database
Product: linux

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs() When we mount device w/ gc_merge mount option, we may suffer below potential deadlock: Kworker GC trehad Truncator - f2fs_write_cache_pages - f2fs_write_single_data_page - f2fs_do_write_data_page - folio_start_writeback --- set writeback flag on folio - f2fs_outplace_write_data : cached folio in internal bio cache - f2fs_balance_fs - wake_up(gc_thread) : wake up gc thread to run foreground GC - finish_wait(fggc_wq) : wait on the waitqueue --- wait on GC thread to finish the work - truncate_inode_pages_range - __filemap_get_folio(, FGP_LOCK) --- lock folio - truncate_inode_partial_folio - folio_wait_writeback --- wait on writeback being cleared - do_garbage_collect - move_data_page - f2fs_get_lock_data_folio - lock on folio --- blocked on folio's lock In order to avoid such deadlock, let's call below functions to commit cached bios in GC_MERGE path of f2fs_balance_fs() as the same as we did in NOGC_MERGE path. - f2fs_submit_merged_write(sbi, DATA); - f2fs_submit_all_merged_ipu_writes(sbi);

Technical Details

Gcve Source
db.gcve.eu
Osv Id
GHSA-phqv-2q9m-94vv
Osv Schema Version
1.4.0
Aliases
["CVE-2026-68459"]
Ecosystems
[]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a808b79bf8831d539502e23

Added to database: 08/15/2026, 15:53:29 UTC

Last enriched: 08/15/2026, 17:13:22 UTC

Last updated: 09/06/2026, 22:52:13 UTC

Views: 104

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