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PUBLISHED

CVE-2021-47433

btrfs: fix abort logic in btrfs_replace_file_extents

Assigner:Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
Reserved:2024-05-21
Published:2024-05-22
Updated:2024-06-10

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix abort logic in btrfs_replace_file_extents Error injection testing uncovered a case where we'd end up with a corrupt file system with a missing extent in the middle of a file. This occurs because the if statement to decide if we should abort is wrong. The only way we would abort in this case is if we got a ret != -EOPNOTSUPP and we called from the file clone code. However the prealloc code uses this path too. Instead we need to abort if there is an error, and the only error we _don't_ abort on is -EOPNOTSUPP and only if we came from the clone file code.

Product status

Default status
unaffected

1da177e4c3f4 before 0e32a2b85c7d
affected

1da177e4c3f4 before 0e309e1152fc
affected

1da177e4c3f4 before 4afb912f439c
affected

Default status
affected

5.10.75
unaffected

5.14.14
unaffected

5.15
unaffected

References

https://git.kernel.org/stable/c/0e32a2b85c7d92ece86c17dfef390c5ed79c6378

https://git.kernel.org/stable/c/0e309e1152fc34ef75991d9d69b165dbf75bf26c

https://git.kernel.org/stable/c/4afb912f439c4bc4e6a4f3e7547f2e69e354108f

cve.org CVE-2021-47433

nvd.nist.gov CVE-2021-47433

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