DEBIAN-CVE-2023-53149
- Source
- https://security-tracker.debian.org/tracker/DEBIAN-CVE-2023-53149
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53149.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2023-53149
- Upstream
- Published
- 2025-09-15T14:15:37Z
- Modified
- 2025-09-19T06:16:00Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid deadlock in fs reclaim with page writeback Ext4 has a filesystem wide lock protecting ext4writepages() calls to avoid races with switching of journalled data flag or inode format. This lock can however cause a deadlock like: CPU0 CPU1 ext4writepages() percpudownread(sbi->swritepagesrwsem); ext4changeinodejournalflag() percpudownwrite(sbi->swritepagesrwsem); - blocks, all readers block from now on ext4dowritepages() ext4initioend() kmemcachezalloc(ioendcachep, GFPKERNEL) fsreclaim frees dentry... dentryunlinkinode() iput() - last ref => iputfinal() - inode dirty => writeinodenow()... ext4writepages() tries to acquire sbi->swritepages_rwsem and blocks forever Make sure we cannot recurse into filesystem reclaim from writeback code to avoid the deadlock.
- References
Affected packages
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:14 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source