ghsa-ggg7-h54g-wmq5
Vulnerability from github
Published
2025-09-17 15:30
Modified
2025-09-17 15:30
Details

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

rxrpc: Fix potential data race in rxrpc_wait_to_be_connected()

Inside the loop in rxrpc_wait_to_be_connected() it checks call->error to see if it should exit the loop without first checking the call state. This is probably safe as if call->error is set, the call is dead anyway, but we should probably wait for the call state to have been set to completion first, lest it cause surprise on the way out.

Fix this by only accessing call->error if the call is complete. We don't actually need to access the error inside the loop as we'll do that after.

This caused the following report:

BUG: KCSAN: data-race in rxrpc_send_data / rxrpc_set_call_completion

write to 0xffff888159cf3c50 of 4 bytes by task 25673 on cpu 1:
 rxrpc_set_call_completion+0x71/0x1c0 net/rxrpc/call_state.c:22
 rxrpc_send_data_packet+0xba9/0x1650 net/rxrpc/output.c:479
 rxrpc_transmit_one+0x1e/0x130 net/rxrpc/output.c:714
 rxrpc_decant_prepared_tx net/rxrpc/call_event.c:326 [inline]
 rxrpc_transmit_some_data+0x496/0x600 net/rxrpc/call_event.c:350
 rxrpc_input_call_event+0x564/0x1220 net/rxrpc/call_event.c:464
 rxrpc_io_thread+0x307/0x1d80 net/rxrpc/io_thread.c:461
 kthread+0x1ac/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888159cf3c50 of 4 bytes by task 25672 on cpu 0:
 rxrpc_send_data+0x29e/0x1950 net/rxrpc/sendmsg.c:296
 rxrpc_do_sendmsg+0xb7a/0xc20 net/rxrpc/sendmsg.c:726
 rxrpc_sendmsg+0x413/0x520 net/rxrpc/af_rxrpc.c:565
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 ____sys_sendmsg+0x375/0x4c0 net/socket.c:2501
 ___sys_sendmsg net/socket.c:2555 [inline]
 __sys_sendmmsg+0x263/0x500 net/socket.c:2641
 __do_sys_sendmmsg net/socket.c:2670 [inline]
 __se_sys_sendmmsg net/socket.c:2667 [inline]
 __x64_sys_sendmmsg+0x57/0x60 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000 -> 0xffffffea
Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53345"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-17T15:15:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix potential data race in rxrpc_wait_to_be_connected()\n\nInside the loop in rxrpc_wait_to_be_connected() it checks call-\u003eerror to\nsee if it should exit the loop without first checking the call state.  This\nis probably safe as if call-\u003eerror is set, the call is dead anyway, but we\nshould probably wait for the call state to have been set to completion\nfirst, lest it cause surprise on the way out.\n\nFix this by only accessing call-\u003eerror if the call is complete.  We don\u0027t\nactually need to access the error inside the loop as we\u0027ll do that after.\n\nThis caused the following report:\n\n    BUG: KCSAN: data-race in rxrpc_send_data / rxrpc_set_call_completion\n\n    write to 0xffff888159cf3c50 of 4 bytes by task 25673 on cpu 1:\n     rxrpc_set_call_completion+0x71/0x1c0 net/rxrpc/call_state.c:22\n     rxrpc_send_data_packet+0xba9/0x1650 net/rxrpc/output.c:479\n     rxrpc_transmit_one+0x1e/0x130 net/rxrpc/output.c:714\n     rxrpc_decant_prepared_tx net/rxrpc/call_event.c:326 [inline]\n     rxrpc_transmit_some_data+0x496/0x600 net/rxrpc/call_event.c:350\n     rxrpc_input_call_event+0x564/0x1220 net/rxrpc/call_event.c:464\n     rxrpc_io_thread+0x307/0x1d80 net/rxrpc/io_thread.c:461\n     kthread+0x1ac/0x1e0 kernel/kthread.c:376\n     ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308\n\n    read to 0xffff888159cf3c50 of 4 bytes by task 25672 on cpu 0:\n     rxrpc_send_data+0x29e/0x1950 net/rxrpc/sendmsg.c:296\n     rxrpc_do_sendmsg+0xb7a/0xc20 net/rxrpc/sendmsg.c:726\n     rxrpc_sendmsg+0x413/0x520 net/rxrpc/af_rxrpc.c:565\n     sock_sendmsg_nosec net/socket.c:724 [inline]\n     sock_sendmsg net/socket.c:747 [inline]\n     ____sys_sendmsg+0x375/0x4c0 net/socket.c:2501\n     ___sys_sendmsg net/socket.c:2555 [inline]\n     __sys_sendmmsg+0x263/0x500 net/socket.c:2641\n     __do_sys_sendmmsg net/socket.c:2670 [inline]\n     __se_sys_sendmmsg net/socket.c:2667 [inline]\n     __x64_sys_sendmmsg+0x57/0x60 net/socket.c:2667\n     do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n     do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n     entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n    value changed: 0x00000000 -\u003e 0xffffffea",
  "id": "GHSA-ggg7-h54g-wmq5",
  "modified": "2025-09-17T15:30:38Z",
  "published": "2025-09-17T15:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53345"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b5fdc0f5caa505afe34d608e2eefadadf2ee67a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e8ba61a3fe4475a9b5c9fbfc664435c6795d872"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/454e48a9ff04c5fa1631bb172070fcb6389b97f9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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