CVE-2024-26832
Vulnerability from cvelistv5
Published
2024-04-17 10:10
Modified
2024-12-19 08:48
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm: zswap: fix missing folio cleanup in writeback race path In zswap_writeback_entry(), after we get a folio from __read_swap_cache_async(), we grab the tree lock again to check that the swap entry was not invalidated and recycled. If it was, we delete the folio we just added to the swap cache and exit. However, __read_swap_cache_async() returns the folio locked when it is newly allocated, which is always true for this path, and the folio is ref'd. Make sure to unlock and put the folio before returning. This was discovered by code inspection, probably because this path handles a race condition that should not happen often, and the bug would not crash the system, it will only strand the folio indefinitely.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14f1992430ef9e647b02aa8ca12c5bcb9a1dffea
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6156277d1b26cb3fdb6fcbf0686ab78268571644
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2891c763aa2cff74dd6b5e978411ccf0cf94abe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e3b63e966cac0bf78aaa1efede1827a252815a1d
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/14f1992430ef9e647b02aa8ca12c5bcb9a1dffea
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6156277d1b26cb3fdb6fcbf0686ab78268571644
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e2891c763aa2cff74dd6b5e978411ccf0cf94abe
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e3b63e966cac0bf78aaa1efede1827a252815a1d
Impacted products
Vendor Product Version
Linux Linux Version: 6.4
Show details on NVD website

To clipboard 

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