ghsa-3v5r-242w-7766
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable_offload: fix using __this_cpu_add in preemptible
flow_offload_queue_work() can be called in workqueue without bh disabled, like the call trace showed in my act_ct testing, calling NF_FLOW_TABLE_STAT_INC() there would cause a call trace:
BUG: using __this_cpu_add() in preemptible [00000000] code: kworker/u4:0/138560
caller is flow_offload_queue_work+0xec/0x1b0 [nf_flow_table]
Workqueue: act_ct_workqueue tcf_ct_flow_table_cleanup_work [act_ct]
Call Trace:
This patch fixes it by using NF_FLOW_TABLE_STAT_INC_ATOMIC() instead in flow_offload_queue_work().
Note that for FLOW_CLS_REPLACE branch in flow_offload_queue_work(), it may not be called in preemptible path, but it's good to use NF_FLOW_TABLE_STAT_INC_ATOMIC() for all cases in flow_offload_queue_work().
{
"affected": [],
"aliases": [
"CVE-2022-48976"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-21T20:15:09Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable_offload: fix using __this_cpu_add in preemptible\n\nflow_offload_queue_work() can be called in workqueue without\nbh disabled, like the call trace showed in my act_ct testing,\ncalling NF_FLOW_TABLE_STAT_INC() there would cause a call\ntrace:\n\n BUG: using __this_cpu_add() in preemptible [00000000] code: kworker/u4:0/138560\n caller is flow_offload_queue_work+0xec/0x1b0 [nf_flow_table]\n Workqueue: act_ct_workqueue tcf_ct_flow_table_cleanup_work [act_ct]\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x33/0x46\n check_preemption_disabled+0xc3/0xf0\n flow_offload_queue_work+0xec/0x1b0 [nf_flow_table]\n nf_flow_table_iterate+0x138/0x170 [nf_flow_table]\n nf_flow_table_free+0x140/0x1a0 [nf_flow_table]\n tcf_ct_flow_table_cleanup_work+0x2f/0x2b0 [act_ct]\n process_one_work+0x6a3/0x1030\n worker_thread+0x8a/0xdf0\n\nThis patch fixes it by using NF_FLOW_TABLE_STAT_INC_ATOMIC()\ninstead in flow_offload_queue_work().\n\nNote that for FLOW_CLS_REPLACE branch in flow_offload_queue_work(),\nit may not be called in preemptible path, but it\u0027s good to use\nNF_FLOW_TABLE_STAT_INC_ATOMIC() for all cases in\nflow_offload_queue_work().",
"id": "GHSA-3v5r-242w-7766",
"modified": "2024-10-25T21:31:27Z",
"published": "2024-10-21T21:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48976"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a220a11fda012fba506b35929672374c2723ae6d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a81047154e7ce4eb8769d5d21adcbc9693542a79"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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