ghsa-3qgg-rq2q-hq34
Vulnerability from github
Published
2024-07-12 15:31
Modified
2024-07-12 15:31
Details

In the Linux kernel, the following vulnerability has been resolved:

netpoll: Fix race condition in netpoll_owner_active

KCSAN detected a race condition in netpoll:

BUG: KCSAN: data-race in net_rx_action / netpoll_send_skb
write (marked) to 0xffff8881164168b0 of 4 bytes by interrupt on cpu 10:
net_rx_action (./include/linux/netpoll.h:90 net/core/dev.c:6712 net/core/dev.c:6822)

read to 0xffff8881164168b0 of 4 bytes by task 1 on cpu 2: netpoll_send_skb (net/core/netpoll.c:319 net/core/netpoll.c:345 net/core/netpoll.c:393) netpoll_send_udp (net/core/netpoll.c:?) value changed: 0x0000000a -> 0xffffffff

This happens because netpoll_owner_active() needs to check if the current CPU is the owner of the lock, touching napi->poll_owner non atomically. The ->poll_owner field contains the current CPU holding the lock.

Use an atomic read to check if the poll owner is the current CPU.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2024-41005"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:21Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetpoll: Fix race condition in netpoll_owner_active\n\nKCSAN detected a race condition in netpoll:\n\n\tBUG: KCSAN: data-race in net_rx_action / netpoll_send_skb\n\twrite (marked) to 0xffff8881164168b0 of 4 bytes by interrupt on cpu 10:\n\tnet_rx_action (./include/linux/netpoll.h:90 net/core/dev.c:6712 net/core/dev.c:6822)\n\u003csnip\u003e\n\tread to 0xffff8881164168b0 of 4 bytes by task 1 on cpu 2:\n\tnetpoll_send_skb (net/core/netpoll.c:319 net/core/netpoll.c:345 net/core/netpoll.c:393)\n\tnetpoll_send_udp (net/core/netpoll.c:?)\n\u003csnip\u003e\n\tvalue changed: 0x0000000a -\u003e 0xffffffff\n\nThis happens because netpoll_owner_active() needs to check if the\ncurrent CPU is the owner of the lock, touching napi-\u003epoll_owner\nnon atomically. The -\u003epoll_owner field contains the current CPU holding\nthe lock.\n\nUse an atomic read to check if the poll owner is the current CPU.",
  "id": "GHSA-3qgg-rq2q-hq34",
  "modified": "2024-07-12T15:31:30Z",
  "published": "2024-07-12T15:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41005"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f1a155950a1685ffd0fd7175b3f671da8771f3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43c0ca793a18578a0f5b305dd77fcf7ed99f1265"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96826b16ef9c6568d31a1f6ceaa266411a46e46c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a130e7da73ae93afdb4659842267eec734ffbd57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2e6a872bde9912f1a7579639c5ca3adf1003916"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/efd29cd9c7b8369dfc7bcb34637e6bf1a188aa8e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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