Description
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix valid block count leak on data block allocation failure
In __allocate_data_block(), when allocating a new data block (dn->data_blkaddr == NULL_ADDR), inc_valid_block_count() is called first to increment total_valid_block_count and i_blocks. If the subsequent f2fs_allocate_data_block() fails, the function returns the error directly without rolling back the already-incremented block counts, causing a permanent leak.
Fix this by calling dec_valid_block_count() to undo the increment before returning the error. The condition old_blkaddr == NULL_ADDR precisely identifies the case where inc_valid_block_count() was called.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47, < 2d50b6d47e5671ff6a25834c5906d443356191f0; >= 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47, < dde99df5a9d3b0ca6ac0a86f98799685f7399432; >= 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47, < 931e1aa4d44c52ff8e0feb38420a8827c62e886b; >= 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47, < 0f9af07ecc1ab486038373db6ae0436c5d674b19 |
| Linux | Linux | 6.9 |
References
Timeline
- Published
- Sep 16, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received