Bug 2363441 (CVE-2022-49833)

Summary: CVE-2022-49833 kernel: btrfs: zoned: clone zoned device info when cloning a device
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-01 15:04:46 UTC 
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.
Comment 1 Avinash Hanwate 2025-05-02 04:15:26 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050137-CVE-2022-49833-b809@gregkh/T