vulnerability

Oracle Linux: CVE-2024-50006: ELSA-2024-12884: Unbreakable Enterprise kernel security update (IMPORTANT)

Severity
4
CVSS
(AV:L/AC:M/Au:S/C:N/I:N/A:C)
Published
Oct 21, 2024
Added
Dec 17, 2024
Modified
Dec 3, 2025

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

Solution

oracle-linux-upgrade-kernel-uek
Title
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