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CVE-2024-50006— ext4: fix i_data_sem unlock order in ext4_ind_migrate()

EPSS 0.01% · P1
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I. Basic Information for CVE-2024-50006

Vulnerability Information
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Vulnerability Title
ext4: fix i_data_sem unlock order in ext4_ind_migrate()
Source: NVD (National Vulnerability Database)
Vulnerability 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
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在ext4_ind_migrate函数中i_data_sem的解锁顺序不当，可能导致死锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux e8238f9a8339b3578c85e4192a7a23bc2bdc0333 ~ 4192adefc9c570698821c5eb9873320eac2fcbf1 -
LinuxLinux 3.10 -

II. Public POCs for CVE-2024-50006

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III. Intelligence Information for CVE-2024-50006

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Same Patch Batch · Linux · 2024-10-21 · 372 CVEs total

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CVE-2024-50009cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value
CVE-2024-50010exec: don't WARN for racy path_noexec check
CVE-2024-50014ext4: fix access to uninitialised lock in fc replay path
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Showing top 20 of 372 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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