CVE-2023-53845
Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix infinite loop in nilfs_mdt_get_block() If the disk image that nilfs2 mounts is corrupted and a virtual block address obtained by block lookup for a metadata file is invalid, nilfs_bmap_lookup_at_level() may return the same internal return code as -ENOENT, meaning the block does not exist in the metadata file. This duplication of return codes confuses nilfs_mdt_get_block(), causing it to read and create a metadata block indefinitely. In particular, if this happens to the inode metadata file, ifile, semaphore i_rwsem can be left held, causing task hangs in lock_mount. Fix this issue by making nilfs_bmap_lookup_at_level() treat virtual block address translation failures with -ENOENT as metadata corruption instead of returning the error code.
How to fix
- Linux Linuxcfb0bb4fbd40c1f06da7e9f88c0a2d46155b90c2, d536f9976bb04e9c84cf80045a9355975e418f41, fe1cbbcb1a2532ee1654e1ff121be8906d83c6f0, 8a89d36a07afe1ed4564df51fefa2bb556c85412, 8d07d9119642ba43d21f8ba64d51d01931096b20, 25457d07c8146e57d28906c663def033dc425af6, 34c5f17222b50c79848bb03ec8811648813e6a45, 5b29661669cb65b9750a3cf70ed3eaf947b92167, a6a491c048882e7e424d407d32cba0b52d9ef2bf or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < cfb0bb4fbd40c1f06da7e9f88c0a2d46155b90c2, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < d536f9976bb04e9c84cf80045a9355975e418f41, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < fe1cbbcb1a2532ee1654e1ff121be8906d83c6f0, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < 8a89d36a07afe1ed4564df51fefa2bb556c85412, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < 8d07d9119642ba43d21f8ba64d51d01931096b20, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < 25457d07c8146e57d28906c663def033dc425af6, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < 34c5f17222b50c79848bb03ec8811648813e6a45, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < 5b29661669cb65b9750a3cf70ed3eaf947b92167, bdb265eae08db578e7cf5739be16f389d495fc75 ≤ v < a6a491c048882e7e424d407d32cba0b52d9ef2bf, 2.6.30 | cfb0bb4fbd40c1f06da7e9f88c0a2d46155b90c2, d536f9976bb04e9c84cf80045a9355975e418f41, fe1cbbcb1a2532ee1654e1ff121be8906d83c6f0, 8a89d36a07afe1ed4564df51fefa2bb556c85412, 8d07d9119642ba43d21f8ba64d51d01931096b20, 25457d07c8146e57d28906c663def033dc425af6, 34c5f17222b50c79848bb03ec8811648813e6a45, 5b29661669cb65b9750a3cf70ed3eaf947b92167, a6a491c048882e7e424d407d32cba0b52d9ef2bf |
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