ext4: fix i_data_sem unlock order in ext4_ind_migrate()
Published Oct 21, 2024
4.7
MEDIUMCVSS 3.1
EPSS 0.19%
Description
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
Affected products
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- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
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- Version 3.10StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<3.10
- Version 4.19.323StatusunaffectedConstraints<=4.19.*
- Version 5.10.227StatusunaffectedConstraints<=5.10.*
- Version 5.15.168StatusunaffectedConstraints<=5.15.*
- Version 5.4.285StatusunaffectedConstraints<=5.4.*
- Version 6.1.113StatusunaffectedConstraints<=6.1.*
- Version 6.10.14StatusunaffectedConstraints<=6.10.*
- Version 6.11.3StatusunaffectedConstraints<=6.11.*
- Version 6.12StatusunaffectedConstraints<=*
- Version 6.6.55StatusunaffectedConstraints<=6.6.*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
| ||||||||||||||||||||||||||||||||||||
| Linux | Linux | affected |
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- < 5.10.227
- ≥ 5.11 · < 5.15.168
- ≥ 5.16 · < 6.1.113
- ≥ 6.2 · < 6.6.55
- ≥ 6.7 · < 6.10.14
- ≥ 6.11 · < 6.11.3
No data.
Red Hat Enterprise Linux 9
kernel-0:5.14.0-570.12.1.el9_6
Fixed · RHSA-2025:6966
Red Hat Enterprise Linux 9
kernel-0:5.14.0-570.12.1.el9_6
Fixed · RHSA-2025:6966
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-rt
Out of support scope
Red Hat Enterprise Linux 8
kernel
Will not fix
Red Hat Enterprise Linux 8
kernel-rt
Will not fix
Red Hat Enterprise Linux 9
kernel-rt
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-570.12.1.el9_6 | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-570.12.1.el9_6 | Fixed | RHSA-2025:6966 |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | n/a |
| Red Hat Enterprise Linux 8 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
References (20)
- https://access.redhat.com/security/cve/CVE-2024-50006 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2320544 Issue Tracking
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2024-45224 Advisory
- https://git.kernel.org/stable/c/3c46d6060d3e38de22196c1fe7706c5a3c696285
- https://git.kernel.org/stable/c/4192adefc9c570698821c5eb9873320eac2fcbf1
- https://git.kernel.org/stable/c/53b1999cfd2c7addf2e581a32865fe8835467b44 Patch
- https://git.kernel.org/stable/c/6252cb6bde7fc76cb8dcb49d1def7c326b190820 Patch
- https://git.kernel.org/stable/c/9fedf51ab8cf7b69bff08f37fe0989fec7f5d870 Patch
- https://git.kernel.org/stable/c/cc749e61c011c255d81b192a822db650c68b313f Patch
- https://git.kernel.org/stable/c/d43776b907659affef1de888525847d64b244194 Patch
- https://git.kernel.org/stable/c/d58a00e981d3118b91d503da263e640b7cde6729 Patch
- https://git.kernel.org/stable/c/ef05572da0c0eb89614ed01cc17d3c882bdbd1ff Patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://lore.kernel.org/linux-cve-announce/2024102108-CVE-2024-50006-fe44@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2024-50006
- https://www.cve.org/CVERecord?id=CVE-2024-50006
Change history (0)
No recorded changes yet.