CVE-2022-49833

Summary

In the Linux kernel, the following vulnerability has been resolved:

btrfs: zoned: clone zoned device info when cloning a device

When cloning a btrfs_device, we're not cloning the associated btrfs_zoned_device_info structure of the device in case of a zoned filesystem.

Later on this leads to a NULL pointer dereference when accessing the device's zone_info for instance when setting a zone as active.

This was uncovered by fstests' testcase btrfs/161.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/ad88cabcec942c033f980cd1e28d56ecdaf5f3b8
• https://git.kernel.org/stable/c/21e61ec6d0bb786818490e926aa9aeb4de95ad0d

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