)]}'
{
  "commit": "56d96fededd61192cd7cc8d2b0f36adfd59036c3",
  "tree": "9256a46888e88c7348777d6726dca11d62837efe",
  "parents": [
    "2c72eb6286347d05a885412fb076993bd5286b53"
  ],
  "author": {
    "name": "Weiming Shi",
    "email": "bestswngs@gmail.com",
    "time": "Sat Jul 11 04:50:00 2026 -0700"
  },
  "committer": {
    "name": "Paolo Abeni",
    "email": "pabeni@redhat.com",
    "time": "Fri Jul 17 13:20:38 2026 +0200"
  },
  "message": "mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET\u003dn\n\nOn CONFIG_INET\u003dn builds, mpls_valid_fib_dump_req() walks the parsed\nattribute table itself instead of calling ip_valid_fib_dump_req(). The\nRTA_OIF arm passes tb[RTA_OIF] to nla_get_u32() without checking it is\npresent, so an RTM_GETROUTE dump for AF_MPLS with strict checking and no\nRTA_OIF hits a NULL dereference.\n\nRTM_GETROUTE is RTNL_KIND_GET, which rtnetlink_rcv_msg() permits without\nCAP_NET_ADMIN, so an unprivileged user can trigger it.\n\n  Oops: general protection fault, probably for non-canonical address\n        0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI\n  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n  RIP: 0010:mpls_valid_fib_dump_req (net/mpls/af_mpls.c:2189)\n  Call Trace:\n   mpls_dump_routes (net/mpls/af_mpls.c:2236)\n   netlink_dump (net/netlink/af_netlink.c:2331)\n   __netlink_dump_start (net/netlink/af_netlink.c:2446)\n   rtnetlink_rcv_msg (net/core/rtnetlink.c:7033)\n   netlink_rcv_skb (net/netlink/af_netlink.c:2556)\n   netlink_unicast (net/netlink/af_netlink.c:1345)\n   netlink_sendmsg (net/netlink/af_netlink.c:1900)\n   __sock_sendmsg (net/socket.c:790)\n   ____sys_sendmsg (net/socket.c:2684)\n   ___sys_sendmsg (net/socket.c:2738)\n   __sys_sendmsg (net/socket.c:2770)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nSkip unset attributes, as ip_valid_fib_dump_req() does.\n\nFixes: 196cfebf8972 (\"net/mpls: Handle kernel side filtering of route dumps\")\nAssisted-by: Claude:claude-opus-4-8\nReported-by: Xiang Mei \u003cxmei5@asu.edu\u003e\nSigned-off-by: Weiming Shi \u003cbestswngs@gmail.com\u003e\nReviewed-by: David Ahern \u003cdsahern@kernel.org\u003e\nLink: https://patch.msgid.link/20260711114958.1009619-3-bestswngs@gmail.com\nSigned-off-by: Paolo Abeni \u003cpabeni@redhat.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "ca504d9626cff77da1cb08eb4d37fc7043950bbb",
      "old_mode": 33188,
      "old_path": "net/mpls/af_mpls.c",
      "new_id": "318cb7e2ac5f7ca1592217988ebb14fe35626811",
      "new_mode": 33188,
      "new_path": "net/mpls/af_mpls.c"
    }
  ]
}