CVE-2024-50006

ext4: fix i_data_sem unlock order in ext4_ind_migrate()

MEDIUM

4.7

CVSS Score

Published: October 21, 2024 at 06:53 PM UTC

Updated: October 15, 2026 at 01:19 AM UTC

15 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM4.7

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

All versionsv < 5.10.2275.11 ≤ v < 5.15.1685.16 ≤ v < 6.1.1136.11 ≤ v < 6.11.36.2 ≤ v < 6.6.556.7 ≤ v < 6.10.143.10e8238f9a8339b3578c85e4192a7a23bc2bdc0333

Vendor states this is fixed in 3c46d6060d3e38de22196c1fe7706c5a3c696285 (fixed)

Vendor states this is fixed in 4192adefc9c570698821c5eb9873320eac2fcbf1 (fixed)

Vendor states this is fixed in 53b1999cfd2c7addf2e581a32865fe8835467b44 (fixed)

Vendor states this is fixed in 6252cb6bde7fc76cb8dcb49d1def7c326b190820 (fixed)

Vendor states this is fixed in 9fedf51ab8cf7b69bff08f37fe0989fec7f5d870 (fixed)

Vendor states this is fixed in cc749e61c011c255d81b192a822db650c68b313f (fixed)

Vendor states this is fixed in d43776b907659affef1de888525847d64b244194 (fixed)

Vendor states this is fixed in d58a00e981d3118b91d503da263e640b7cde6729 (fixed)

Vendor states this is fixed in ef05572da0c0eb89614ed01cc17d3c882bdbd1ff (fixed)

Vendor states this is fixed in 3.10 (unaffected)

Vendor states this is fixed in 4.19.323 (unaffected)

Vendor states this is fixed in 5.10.227 (unaffected)

Vendor states this is fixed in 5.15.168 (unaffected)

Vendor states this is fixed in 5.4.285 (unaffected)

Vendor states this is fixed in 6.1.113 (unaffected)

Vendor states this is fixed in 6.10.14 (unaffected)

Vendor states this is fixed in 6.11.3 (unaffected)

Vendor states this is fixed in 6.12 (unaffected)

Vendor states this is fixed in 6.6.55 (unaffected)

RUGGEDCOM RST2428P Firmware · Siemens

60%

v < V3.2