CVE-2023-53845

nilfs2: fix infinite loop in nilfs_mdt_get_block()

State: Published
Severity: Not scored
Published: Dec 9, 2025
Updated: May 11, 2026
Reserved: Dec 9, 2025

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	bdb265eae08db578e7cf5739be16f389d495fc75 to before cfb0bb4fbd40c1f06da7e9f88c0a2d46155b90c2Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before d536f9976bb04e9c84cf80045a9355975e418f41Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before fe1cbbcb1a2532ee1654e1ff121be8906d83c6f0Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before 8a89d36a07afe1ed4564df51fefa2bb556c85412Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before 8d07d9119642ba43d21f8ba64d51d01931096b20Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before 25457d07c8146e57d28906c663def033dc425af6Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before 34c5f17222b50c79848bb03ec8811648813e6a45Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before 5b29661669cb65b9750a3cf70ed3eaf947b92167Affected bdb265eae08db578e7cf5739be16f389d495fc75 to before a6a491c048882e7e424d407d32cba0b52d9ef2bfAffected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 4.14.315 through 4.14.Not affected 4.19.283 through 4.19.Not affected 5.4.243 through 5.4.Not affected 5.10.180 through 5.10.Not affected 5.15.111 through 5.15.Not affected 6.1.28 through 6.1.Not affected 6.2.15 through 6.2.Not affected 6.3.2 through 6.3.Not affected 6.4 and laterNot affected

Product

Versions

LinuxLinux

bdb265eae08db578e7cf5739be16f389d495fc75 to before cfb0bb4fbd40c1f06da7e9f88c0a2d46155b90c2Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before d536f9976bb04e9c84cf80045a9355975e418f41Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before fe1cbbcb1a2532ee1654e1ff121be8906d83c6f0Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before 8a89d36a07afe1ed4564df51fefa2bb556c85412Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before 8d07d9119642ba43d21f8ba64d51d01931096b20Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before 25457d07c8146e57d28906c663def033dc425af6Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before 34c5f17222b50c79848bb03ec8811648813e6a45Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before 5b29661669cb65b9750a3cf70ed3eaf947b92167Affected
bdb265eae08db578e7cf5739be16f389d495fc75 to before a6a491c048882e7e424d407d32cba0b52d9ef2bfAffected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
4.14.315 through 4.14.*Not affected
4.19.283 through 4.19.*Not affected
5.4.243 through 5.4.*Not affected
5.10.180 through 5.10.*Not affected
5.15.111 through 5.15.*Not affected
6.1.28 through 6.1.*Not affected
6.2.15 through 6.2.*Not affected
6.3.2 through 6.3.*Not affected
6.4 and laterNot affected

References

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