ghsa-jp9q-c7f4-2fxf
Vulnerability from github
Published
2024-05-21 18:31
Modified
2024-05-21 18:31
Details
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential deadlock when releasing mids
All release_mid() callers seem to hold a reference of @mid so there is no need to call kref_put(&mid->refcount, __release_mid) under @server->mid_lock spinlock. If they don't, then an use-after-free bug would have occurred anyways.
By getting rid of such spinlock also fixes a potential deadlock as shown below
CPU 0 CPU 1
cifs_demultiplex_thread() cifs_debug_data_proc_show() release_mid() spin_lock(&server->mid_lock); spin_lock(&cifs_tcp_ses_lock) spin_lock(&server->mid_lock) __release_mid() smb2_find_smb_tcon() spin_lock(&cifs_tcp_ses_lock) deadlock
{
"affected": [],
"aliases": [
"CVE-2023-52757"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-21T16:15:15Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential deadlock when releasing mids\n\nAll release_mid() callers seem to hold a reference of @mid so there is\nno need to call kref_put(\u0026mid-\u003erefcount, __release_mid) under\n@server-\u003emid_lock spinlock. If they don\u0027t, then an use-after-free bug\nwould have occurred anyways.\n\nBy getting rid of such spinlock also fixes a potential deadlock as\nshown below\n\nCPU 0 CPU 1\n------------------------------------------------------------------\ncifs_demultiplex_thread() cifs_debug_data_proc_show()\n release_mid()\n spin_lock(\u0026server-\u003emid_lock);\n spin_lock(\u0026cifs_tcp_ses_lock)\n\t\t\t\t spin_lock(\u0026server-\u003emid_lock)\n __release_mid()\n smb2_find_smb_tcon()\n spin_lock(\u0026cifs_tcp_ses_lock) *deadlock*",
"id": "GHSA-jp9q-c7f4-2fxf",
"modified": "2024-05-21T18:31:20Z",
"published": "2024-05-21T18:31:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52757"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9eb44db68c5b7f5aa22b8fc7de74a3e2e08d1f29"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b9bb9607b1fc12fca51f5632da25b36975f599bf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c1a5962f1462b64fe7b69f20a4b6af8067bc2d26"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e6322fd177c6885a21dd4609dc5e5c973d1a2eb7"
}
],
"schema_version": "1.4.0",
"severity": []
}
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