{"cve":"CVE-2024-56780","nvd":{"published":"2025-01-08T18:15:18.910","modified":"2026-10-15T02:17:11.373","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nquota: flush quota_release_work upon quota writeback\n\nOne of the paths quota writeback is called from is:\n\nfreeze_super()\n  sync_filesystem()\n    ext4_sync_fs()\n      dquot_writeback_dquots()\n\nSince we currently don't always flush the quota_release_work queue in\nthis path, we can end up with the following race:\n\n 1. dquot are added to releasing_dquots list during regular operations.\n 2. FS Freeze starts, however, this does not flush the quota_release_work queue.\n 3. Freeze completes.\n 4. Kernel eventually tries to flush the workqueue while FS is frozen which\n    hits a WARN_ON since transaction gets started during frozen state:\n\n  ext4_journal_check_start+0x28/0x110 [ext4] (unreliable)\n  __ext4_journal_start_sb+0x64/0x1c0 [ext4]\n  ext4_release_dquot+0x90/0x1d0 [ext4]\n  quota_release_workfn+0x43c/0x4d0\n\nWhich is the following line:\n\n  WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE);\n\nWhich ultimately results in generic/390 failing due to dmesg\nnoise. This was detected on powerpc machine 15 cores.\n\nTo avoid this, make sure to flush the workqueue during\ndquot_writeback_dquots() so we dont have any pending workitems after\nfreeze.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb","https://git.kernel.org/stable/c/6f3821acd7c3143145999248087de5fb4b48cf26","https://git.kernel.org/stable/c/8ea87e34792258825d290f4dc5216276e91cb224","https://git.kernel.org/stable/c/a5abba5e0e586e258ded3e798fe5f69c66fec198","https://git.kernel.org/stable/c/ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:58:20.756570362+00:00"},"epss":{"cve":"CVE-2024-56780","score":0.00217,"percentile":0.12085,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}