CVE-2025-38626 f2fs: fix to trigger foreground gc during f2fs_map_blocks() in lfs mode

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to trigger foreground gc during f2fsmapblocks in lfs mode w/ "mode=lfs" mount option, generic/299 will cause system panic as below: ------------ cut here ------------ kernel BUG at fs/f2fs/segment.c:2835! Call Trace:...

CVE-2025-38626

CVE-2025-38626 affects the Linux kernel with the F2FS file system in foreground log-structured (lfs) mode. The issue arises in f2fs_map_blocks() where allocations can trigger block allocations aggressively under parallel aio/dio/bufio workloads, potentially exhausting space and causing a system p...