)]}'
{
  "commit": "3fbd73d24dcc5bb50f8211b38d77b30eaeb3f368",
  "tree": "1b80307171e1070b41b1c3b7c2d572ab28135511",
  "parents": [
    "16f6642572af761c22c7e612c739a352158ce953"
  ],
  "author": {
    "name": "Cen Zhang",
    "email": "zzzccc427@gmail.com",
    "time": "Tue Jul 07 12:15:18 2026 +0800"
  },
  "committer": {
    "name": "Luiz Augusto von Dentz",
    "email": "luiz.von.dentz@intel.com",
    "time": "Tue Jul 07 11:52:44 2026 -0400"
  },
  "message": "Bluetooth: MGMT: revalidate LOAD_CONN_PARAM queued update\n\nMGMT_OP_LOAD_CONN_PARAM queues conn_update_sync() when a single parameter\nupdate changes an existing LE central connection. The queued work currently\nstores a borrowed hci_conn_params entry from hdev-\u003ele_conn_params. A later\nLOAD_CONN_PARAM request can clear disabled parameters and free that entry\nbefore hci_cmd_sync_work() runs the queued callback.\n\nDo not keep the borrowed hci_conn_params pointer in queued work. Queue the\nhci_conn instead and hold a reference until the queued callback completes.\nWhen the work runs, revalidate that the connection is still present, look\nup the current hci_conn_params entry, and cancel the update if userspace\nremoved that entry while the work was pending.\n\nCopy the interval values from the current params entry under hdev-\u003elock,\nthen drop the lock and keep using hci_le_conn_update_sync() to issue the\nupdate.\n\nValidation reproduced this kernel report:\nBUG: KASAN: slab-use-after-free in conn_update_sync+0x2a/0xf0 [bluetooth]\nRead of size 1 at addr ffff88810c697126 by task kworker/u17:0/377\nWorkqueue: hci0 hci_cmd_sync_work [bluetooth]\n\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x66/0xa0\n print_report+0xce/0x5f0\n kasan_report+0xe0/0x110\n conn_update_sync+0x2a/0xf0 [bluetooth]\n hci_cmd_sync_work+0x187/0x210 [bluetooth]\n process_one_work+0x4fd/0xbc0\n worker_thread+0x2d8/0x570\n kthread+0x1ad/0x1f0\n ret_from_fork+0x3c9/0x540\n ret_from_fork_asm+0x1a/0x30\n\nAllocated by task 466:\n hci_conn_params_add+0xa6/0x240 [bluetooth]\n load_conn_param+0x4e1/0x850 [bluetooth]\n hci_sock_sendmsg+0x96b/0xf80 [bluetooth]\n\nFreed by task 474:\n kfree+0x313/0x590\n hci_conn_params_clear_disabled+0x9b/0xc0 [bluetooth]\n load_conn_param+0x4bf/0x850 [bluetooth]\n hci_sock_sendmsg+0x96b/0xf80 [bluetooth]\n\nFixes: 0ece498c27d8c (\"Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection\")\nSuggested-by: Luiz Augusto von Dentz \u003cluiz.dentz@gmail.com\u003e\nAssisted-by: Codex:gpt-5.5\nSigned-off-by: Cen Zhang \u003czzzccc427@gmail.com\u003e\nSigned-off-by: Luiz Augusto von Dentz \u003cluiz.von.dentz@intel.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "733a4b70e10c581b6c7864e92df905a0b437ef38",
      "old_mode": 33188,
      "old_path": "net/bluetooth/mgmt.c",
      "new_id": "a0a491e5311e10f82eb2abbe576c3f8780c1c2df",
      "new_mode": 33188,
      "new_path": "net/bluetooth/mgmt.c"
    }
  ]
}