GHSA-H5XQ-P424-H7CQ
Vulnerability from github – Published: 2024-12-24 12:30 – Updated: 2025-11-03 21:31In the Linux kernel, the following vulnerability has been resolved:
ocfs2: fix uninitialized value in ocfs2_file_read_iter()
Syzbot has reported the following KMSAN splat:
BUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80 ocfs2_file_read_iter+0x9a4/0xf80 __io_read+0x8d4/0x20f0 io_read+0x3e/0xf0 io_issue_sqe+0x42b/0x22c0 io_wq_submit_work+0xaf9/0xdc0 io_worker_handle_work+0xd13/0x2110 io_wq_worker+0x447/0x1410 ret_from_fork+0x6f/0x90 ret_from_fork_asm+0x1a/0x30
Uninit was created at: __alloc_pages_noprof+0x9a7/0xe00 alloc_pages_mpol_noprof+0x299/0x990 alloc_pages_noprof+0x1bf/0x1e0 allocate_slab+0x33a/0x1250 slaballoc+0x12ef/0x35e0 kmem_cache_alloc_bulk_noprof+0x486/0x1330 io_alloc_req_refill+0x84/0x560 io_submit_sqes+0x172f/0x2f30 __se_sys_io_uring_enter+0x406/0x41c0 __x64_sys_io_uring_enter+0x11f/0x1a0 x64_sys_call+0x2b54/0x3ba0 do_syscall_64+0xcd/0x1e0 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Since an instance of 'struct kiocb' may be passed from the block layer with 'private' field uninitialized, introduce 'ocfs2_iocb_init_rw_locked()' and use it from where 'ocfs2_dio_end_io()' might take care, i.e. in 'ocfs2_file_read_iter()' and 'ocfs2_file_write_iter()'.
{
"affected": [],
"aliases": [
"CVE-2024-53155"
],
"database_specific": {
"cwe_ids": [
"CWE-908"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-24T12:15:23Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix uninitialized value in ocfs2_file_read_iter()\n\nSyzbot has reported the following KMSAN splat:\n\nBUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80\n ocfs2_file_read_iter+0x9a4/0xf80\n __io_read+0x8d4/0x20f0\n io_read+0x3e/0xf0\n io_issue_sqe+0x42b/0x22c0\n io_wq_submit_work+0xaf9/0xdc0\n io_worker_handle_work+0xd13/0x2110\n io_wq_worker+0x447/0x1410\n ret_from_fork+0x6f/0x90\n ret_from_fork_asm+0x1a/0x30\n\nUninit was created at:\n __alloc_pages_noprof+0x9a7/0xe00\n alloc_pages_mpol_noprof+0x299/0x990\n alloc_pages_noprof+0x1bf/0x1e0\n allocate_slab+0x33a/0x1250\n ___slab_alloc+0x12ef/0x35e0\n kmem_cache_alloc_bulk_noprof+0x486/0x1330\n __io_alloc_req_refill+0x84/0x560\n io_submit_sqes+0x172f/0x2f30\n __se_sys_io_uring_enter+0x406/0x41c0\n __x64_sys_io_uring_enter+0x11f/0x1a0\n x64_sys_call+0x2b54/0x3ba0\n do_syscall_64+0xcd/0x1e0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nSince an instance of \u0027struct kiocb\u0027 may be passed from the block layer\nwith \u0027private\u0027 field uninitialized, introduce \u0027ocfs2_iocb_init_rw_locked()\u0027\nand use it from where \u0027ocfs2_dio_end_io()\u0027 might take care, i.e. in\n\u0027ocfs2_file_read_iter()\u0027 and \u0027ocfs2_file_write_iter()\u0027.",
"id": "GHSA-h5xq-p424-h7cq",
"modified": "2025-11-03T21:31:45Z",
"published": "2024-12-24T12:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53155"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/366c933c2ab34dd6551acc03b4872726b7605143"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6c8f8d1e595dabd5389817f6d798cc8bd95c40ab"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/83f8713a0ef1d55d6a287bcfadcaab8245ac5098"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8c966150d5abff58c3c2bdb9a6e63fd773782905"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8e0de82ed18ba0e71f817adbd81317fd1032ca5a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/adc77b19f62d7e80f98400b2fca9d700d2afdd6f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dc78efe556fed162d48736ef24066f42e463e27c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f4078ef38d3163e6be47403a619558b19c4bfccd"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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