CVE-2022-49761 (GCVE-0-2022-49761)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2025-12-23 13:25
VLAI?
Title
btrfs: always report error in run_one_delayed_ref()
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: always report error in run_one_delayed_ref() Currently we have a btrfs_debug() for run_one_delayed_ref() failure, but if end users hit such problem, there will be no chance that btrfs_debug() is enabled. This can lead to very little useful info for debugging. This patch will: - Add extra info for error reporting Including: * logical bytenr * num_bytes * type * action * ref_mod - Replace the btrfs_debug() with btrfs_err() - Move the error reporting into run_one_delayed_ref() This is to avoid use-after-free, the @node can be freed in the caller. This error should only be triggered at most once. As if run_one_delayed_ref() failed, we trigger the error message, then causing the call chain to error out: btrfs_run_delayed_refs() `- btrfs_run_delayed_refs() `- btrfs_run_delayed_refs_for_head() `- run_one_delayed_ref() And we will abort the current transaction in btrfs_run_delayed_refs(). If we have to run delayed refs for the abort transaction, run_one_delayed_ref() will just cleanup the refs and do nothing, thus no new error messages would be output.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 79787eaab46121d4713ed03c8fc63b9ec3eaec76 , < 18bd1c9c02e64a3567f90c83c2c8b855531c8098 (git)
Affected: 79787eaab46121d4713ed03c8fc63b9ec3eaec76 , < fdb4a70bb768d2a87890409597529ad81cb3de8a (git)
Affected: 79787eaab46121d4713ed03c8fc63b9ec3eaec76 , < 853ffa1511b058c79a4c9bb1407b3b20ce311792 (git)
Affected: 79787eaab46121d4713ed03c8fc63b9ec3eaec76 , < 39f501d68ec1ed5cd5c66ac6ec2a7131c517bb92 (git)
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    Linux Linux Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 5.10.165 , ≤ 5.10.* (semver)
Unaffected: 5.15.90 , ≤ 5.15.* (semver)
Unaffected: 6.1.8 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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