CVE-2023-54268
Description
In the Linux kernel, the following vulnerability has been resolved: debugobjects: Don't wake up kswapd from fill_pool() syzbot is reporting a lockdep warning in fill_pool() because the allocation from debugobjects is using GFP_ATOMIC, which is (__GFP_HIGH | __GFP_KSWAPD_RECLAIM) and therefore tries to wake up kswapd, which acquires kswapd_wait::lock. Since fill_pool() might be called with arbitrary locks held, fill_pool() should not assume that acquiring kswapd_wait::lock is safe. Use __GFP_HIGH instead and remove __GFP_NORETRY as it is pointless for !__GFP_DIRECT_RECLAIM allocation.
How to fix
- Linux Linuxbe646802b3dc408c4dc72a3ac32c3f4a0282414d, fd673079749bac97bb30f1461df079e6c8e86511, aee97eec77029270866c704f66cdf2881cbd2fe1, d7fff52c99d52f180d8bef95d8ed8fec6343889c, 4c088d30a72d9b8f9c6ae9362222942e4075cb00, eb799279fb1f9c63c520fe8c1c41cb9154252db6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 3ac7fe5a4aab409bd5674d0b070bce97f9d20872 ≤ v < be646802b3dc408c4dc72a3ac32c3f4a0282414d, 3ac7fe5a4aab409bd5674d0b070bce97f9d20872 ≤ v < fd673079749bac97bb30f1461df079e6c8e86511, 3ac7fe5a4aab409bd5674d0b070bce97f9d20872 ≤ v < aee97eec77029270866c704f66cdf2881cbd2fe1, 3ac7fe5a4aab409bd5674d0b070bce97f9d20872 ≤ v < d7fff52c99d52f180d8bef95d8ed8fec6343889c, 3ac7fe5a4aab409bd5674d0b070bce97f9d20872 ≤ v < 4c088d30a72d9b8f9c6ae9362222942e4075cb00, 3ac7fe5a4aab409bd5674d0b070bce97f9d20872 ≤ v < eb799279fb1f9c63c520fe8c1c41cb9154252db6, 2.6.26 | be646802b3dc408c4dc72a3ac32c3f4a0282414d, fd673079749bac97bb30f1461df079e6c8e86511, aee97eec77029270866c704f66cdf2881cbd2fe1, d7fff52c99d52f180d8bef95d8ed8fec6343889c, 4c088d30a72d9b8f9c6ae9362222942e4075cb00, eb799279fb1f9c63c520fe8c1c41cb9154252db6 |
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