CVE-2023-52569

Summary

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

btrfs: remove BUG() after failure to insert delayed dir index item

Instead of calling BUG() when we fail to insert a delayed dir index item into the delayed node's tree, we can just release all the resources we have allocated/acquired before and return the error to the caller. This is fine because all existing call chains undo anything they have done before calling btrfs_insert_delayed_dir_index() or BUG_ON (when creating pending snapshots in the transaction commit path).

So remove the BUG() call and do proper error handling.

This relates to a syzbot report linked below, but does not fix it because it only prevents hitting a BUG(), it does not fix the issue where somehow we attempt to use twice the same index number for different index items.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9b378f6ad48cfa195ed868db9123c09ee7ec5ea2 < d10fd53393cc5de4b9cf1a4b8f9984f0a037aa51affected
LinuxLinux9b378f6ad48cfa195ed868db9123c09ee7ec5ea2 < 2c58c3931ede7cd08cbecf1f1a4acaf0a04a41a9affected
LinuxLinux79cf35e16dd5b8639909d4df957503b84de30406affected
LinuxLinux5441532ffc9c8c9f7cab0f8722e6d60a0b5e1259affected
LinuxLinux5.15.149 < 5.16affected
LinuxLinux6.4.12 < 6.5affected
LinuxLinux6.5affected
LinuxLinux0 < 6.5unaffected
LinuxLinux6.5.6 <= 6.5.*unaffected
LinuxLinux6.6 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References