ghsa-6rhp-8rx2-2869
Vulnerability from github
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": [],
"aliases": [
"CVE-2024-50006"
],
"database_specific": {
"cwe_ids": [
"CWE-667"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-21T19:15:04Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix i_data_sem unlock order in ext4_ind_migrate()\n\nFuzzing reports a possible deadlock in jbd2_log_wait_commit.\n\nThis issue is triggered when an EXT4_IOC_MIGRATE ioctl is set to require\nsynchronous updates because the file descriptor is opened with O_SYNC.\nThis can lead to the jbd2_journal_stop() function calling\njbd2_might_wait_for_commit(), potentially causing a deadlock if the\nEXT4_IOC_MIGRATE call races with a write(2) system call.\n\nThis problem only arises when CONFIG_PROVE_LOCKING is enabled. In this\ncase, the jbd2_might_wait_for_commit macro locks jbd2_handle in the\njbd2_journal_stop function while i_data_sem is locked. This triggers\nlockdep because the jbd2_journal_start function might also lock the same\njbd2_handle simultaneously.\n\nFound by Linux Verification Center (linuxtesting.org) with syzkaller.\n\nRule: add",
"id": "GHSA-6rhp-8rx2-2869",
"modified": "2024-11-08T18:30:46Z",
"published": "2024-10-21T21:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50006"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3c46d6060d3e38de22196c1fe7706c5a3c696285"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4192adefc9c570698821c5eb9873320eac2fcbf1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/53b1999cfd2c7addf2e581a32865fe8835467b44"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6252cb6bde7fc76cb8dcb49d1def7c326b190820"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9fedf51ab8cf7b69bff08f37fe0989fec7f5d870"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc749e61c011c255d81b192a822db650c68b313f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d43776b907659affef1de888525847d64b244194"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d58a00e981d3118b91d503da263e640b7cde6729"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ef05572da0c0eb89614ed01cc17d3c882bdbd1ff"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
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