CVE-2024-50006

ext4: fix i_data_sem unlock order in ext4_ind_migrate()

MEDIUM 4.7

At a glance

Source
NVD
EPSS
EPSS 0.19 % · percentile 9 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix i_data_sem unlock order in ext4_ind_migrate() Fuzzing reports a possible deadlock in jbd2_log_wait_commit. This issue is triggered when an EXT4_IOC_MIGRATE ioctl is set to require synchronous updates because the file descriptor is opened with O_SYNC. This can lead to the jbd2_journal_stop() function calling jbd2_might_wait_for_commit(), potentially causing a deadlock if the EXT4_IOC_MIGRATE call races with a write(2) system call. This problem only arises when CONFIG_PROVE_LOCKING is enabled. In this case, the jbd2_might_wait_for_commit macro locks jbd2_handle in the jbd2_journal_stop function while i_data_sem is locked. This triggers lockdep because the jbd2_journal_start function might also lock the same jbd2_handle simultaneously. Found by Linux Verification Center (linuxtesting.org) with syzkaller. Rule: add

Weaknesses (CWE)

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected e8238f9a8339b3578c85e4192a7a23bc2bdc0333 < 4192adefc9c570698821c5eb9873320eac2fcbf1 ; affected e8238f9a8339b3578c85e4192a7a23bc2bdc0333 < 3c46d6060d3e38de22196c1fe7706c5a3c696285 ; affected e8238f9a8339b3578c85e4192a7a23bc2bdc0333 < 53b1999cfd2c7addf2e581a32865fe8835467b44 ; affected e8238f9a8339b3578c85e4192a7a23bc2bdc0333 < ef05572da0c0eb89614ed01cc17d3c882bdbd1ff ; affected e8238f9a8339b3578c85e4192a7a23bc2bdc0333 < 9fedf51ab8cf7b69bff08f37fe0989fec7f5d870 ; affected e8238f9a8339b3578c85e4192a7a23bc2bdc0333 < d43776b907659affef1de888525847d64b244194
Linux · Linuxaffected 3.10 ; unaffected 0 < 3.10 ; unaffected 4.19.323 ≤ 4.19.* ; unaffected 5.4.285 ≤ 5.4.* ; unaffected 5.10.227 ≤ 5.10.* ; unaffected 5.15.168 ≤ 5.15.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD