)]}'
{
  "commit": "80aa802c8b1dacdfd244bb9931499a2fa4fcd118",
  "tree": "6397b6159ac5b8957956e01fa1b84e73de5a91db",
  "parents": [
    "b785f91cb93129e15012e12882b364b18eca84e3"
  ],
  "author": {
    "name": "Eric Dumazet",
    "email": "edumazet@google.com",
    "time": "Wed Jun 11 11:15:11 2025 +0000"
  },
  "committer": {
    "name": "Cloud Image Release",
    "email": "cloud-image-release@prod.google.com",
    "time": "Mon Jun 16 13:26:13 2025 -0700"
  },
  "message": "net_sched: prio: fix a race in prio_tune()\n\nGerrard Tai reported a race condition in PRIO, whenever SFQ perturb timer\nfires at the wrong time.\n\nThe race is as follows:\n\nCPU 0                                 CPU 1\n[1]: lock root\n[2]: qdisc_tree_flush_backlog()\n[3]: unlock root\n |\n |                                    [5]: lock root\n |                                    [6]: rehash\n |                                    [7]: qdisc_tree_reduce_backlog()\n |\n[4]: qdisc_put()\n\nThis can be abused to underflow a parent\u0027s qlen.\n\nCalling qdisc_purge_queue() instead of qdisc_tree_flush_backlog()\nshould fix the race, because all packets will be purged from the qdisc\nbefore releasing the lock.\n\nBUG\u003db/425128942\nTEST\u003dpresubmit\nRELEASE_NOTE\u003dFixed KCTF-d35acc1 in the Linux kernel.\n\ncos-patch: security-high\nFixes: 7b8e0b6e6599 (\"net: sched: prio: delay destroying child qdiscs on change\")\nReported-by: Gerrard Tai \u003cgerrard.tai@starlabs.sg\u003e\nSuggested-by: Gerrard Tai \u003cgerrard.tai@starlabs.sg\u003e\nSigned-off-by: Eric Dumazet \u003cedumazet@google.com\u003e\nLink: https://patch.msgid.link/20250611111515.1983366-2-edumazet@google.com\nSigned-off-by: Jakub Kicinski \u003ckuba@kernel.org\u003e\nChange-Id: I4596d572d2e3a8148407461e0c50f9066fbb96fd\nReviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/105179\nTested-by: Cusky Presubmit Bot \u003cpresubmit@cos-infra-prod.iam.gserviceaccount.com\u003e\nMain-Branch-Verified: Cusky Presubmit Bot \u003cpresubmit@cos-infra-prod.iam.gserviceaccount.com\u003e\nReviewed-by: Robert Kolchmeyer \u003crkolchmeyer@google.com\u003e\nReviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/105217\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "fdc5ef52c3ee92c40232a5af7c68ce920b61b7e6",
      "old_mode": 33188,
      "old_path": "net/sched/sch_prio.c",
      "new_id": "fdd9caa41e80fb07cb32865f52ff885b3fec71e3",
      "new_mode": 33188,
      "new_path": "net/sched/sch_prio.c"
    }
  ]
}