Tracker / CVE-2023-53337
CVE-2023-53337
In the Linux kernel, the following vulnerability has been resolved: nilfs2: do not write dirty data after degenerating to read-only According to syzbot's report, mark_buffer_dirty() called from nilfs_segctor_do_construct() outputs a warning with some patterns after nilfs2 detects metadata corruption and degrades to read-only mode. After such read-only degeneration, page cache data may be cleared through nilfs_clear_dirty_page() which may also clear the uptodate flag for their buffer heads. However, even after the degeneration, log writes are still performed by unmount processing etc., which causes mark_buffer_dirty() to be called for buffer heads without the "uptodate" flag and causes the warning. Since any writes should not be done to a read-only file system in the first place, this fixes the warning in mark_buffer_dirty() by letting nilfs_segctor_do_construct() abort early if in read-only mode. This also changes the retry check of nilfs_segctor_write_out() to avoid unnecessary log write retries if it detects -EROFS that nilfs_segctor_do_construct() returned.
Prodotti e versioni affette
| linux | linux_kernel · … → 4.14.315 |
|---|---|
| linux | linux_kernel · 4.15 → 4.19.283 |
| linux | linux_kernel · 4.20 → 5.4.243 |
| linux | linux_kernel · 5.11 → 5.15.111 |
| linux | linux_kernel · 5.16 → 6.1.28 |
| linux | linux_kernel · 5.5 → 5.10.180 |
| linux | linux_kernel · 6.2 → 6.2.15 |
| linux | linux_kernel · 6.3 → 6.3.2 |