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Vulnerability CVE-2024-41080
Published: 2024-07-29
| Description: |
In the Linux kernel, the following vulnerability has been resolved:
io_uring: fix possible deadlock in io_register_iowq_max_workers()
The io_register_iowq_max_workers() function calls io_put_sq_data(),
which acquires the sqd->lock without releasing the uring_lock.
Similar to the commit 009ad9f0c6ee ("io_uring: drop ctx->uring_lock
before acquiring sqd->lock"), this can lead to a potential deadlock
situation.
To resolve this issue, the uring_lock is released before calling
io_put_sq_data(), and then it is re-acquired after the function call.
This change ensures that the locks are acquired in the correct
order, preventing the possibility of a deadlock. |
References: |
https://git.kernel.org/stable/c/b571a367502c7ef94c688ef9c7f7d69a2ce3bcca
https://git.kernel.org/stable/c/73254a297c2dd094abec7c9efee32455ae875bdf
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