btrfs: don't take dev_replace rwsem on task already holding it

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CVE-2024-38556

CVE-2024-38556 affects the Linux kernel net/mlx5 code. The vulnerability arises from how the command queue semaphore timeout handling can allow an entry to be processed before an index is allocated, risking an out-of-bounds access at idx = -22 if the completion path proceeds without proper synchr...

CVE-2024-38556 net/mlx5: Add a timeout to acquire the command queue semaphore

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Add a timeout to acquire the command queue semaphore Prevent forced completion handling on an entry that has not yet been assigned an index, causing an out of bounds access on idx = -22. Instead of waiting indefinitely...