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.
Metrics
No CVSS score has been published yet.
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 3ac7fe5a4aab409bd5674d0b070bce97f9d20872, < be646802b3dc408c4dc72a3ac32c3f4a0282414d; >= 3ac7fe5a4aab409bd5674d0b070bce97f9d20872, < fd673079749bac97bb30f1461df079e6c8e86511; >= 3ac7fe5a4aab409bd5674d0b070bce97f9d20872, < aee97eec77029270866c704f66cdf2881cbd2fe1; >= 3ac7fe5a4aab409bd5674d0b070bce97f9d20872, < d7fff52c99d52f180d8bef95d8ed8fec6343889c; >= 3ac7fe5a4aab409bd5674d0b070bce97f9d20872, < 4c088d30a72d9b8f9c6ae9362222942e4075cb00; >= 3ac7fe5a4aab409bd5674d0b070bce97f9d20872, < eb799279fb1f9c63c520fe8c1c41cb9154252db6 |
| Linux | Linux | 2.6.26 |
References
- https://git.kernel.org/stable/c/4c088d30a72d9b8f9c6ae9362222942e4075cb00
- https://git.kernel.org/stable/c/aee97eec77029270866c704f66cdf2881cbd2fe1
- https://git.kernel.org/stable/c/be646802b3dc408c4dc72a3ac32c3f4a0282414d
- https://git.kernel.org/stable/c/d7fff52c99d52f180d8bef95d8ed8fec6343889c
- https://git.kernel.org/stable/c/eb799279fb1f9c63c520fe8c1c41cb9154252db6
- https://git.kernel.org/stable/c/fd673079749bac97bb30f1461df079e6c8e86511
Timeline
- Published
- Dec 30, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Deferred