{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-22025",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-22025"
  ],
  "published": "2025-04-16T14:14:59Z",
  "summary": "nfsd: put dl_stid if fail to queue dl_recall",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: put dl_stid if fail to queue dl_recall\n\nBefore calling nfsd4_run_cb to queue dl_recall to the callback_wq, we\nincrement the reference count of dl_stid.\nWe expect that after the corresponding work_struct is processed, the\nreference count of dl_stid will be decremented through the callback\nfunction nfsd4_cb_recall_release.\nHowever, if the call to nfsd4_run_cb fails, the incremented reference\ncount of dl_stid will not be decremented correspondingly, leading to the\nfollowing nfs4_stid leak:\nunreferenced object 0xffff88812067b578 (size 344):\n  comm \"nfsd\", pid 2761, jiffies 4295044002 (age 5541.241s)\n  hex dump (first 32 bytes):\n    01 00 00 00 6b 6b 6b 6b b8 02 c0 e2 81 88 ff ff  ....kkkk........\n    00 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 ad 4e ad de  .kkkkkkk.....N..\n  backtrace:\n    kmem_cache_alloc+0x4b9/0x700\n    nfsd4_process_open1+0x34/0x300\n    nfsd4_open+0x2d1/0x9d0\n    nfsd4_proc_compound+0x7a2/0xe30\n    nfsd_dispatch+0x241/0x3e0\n    svc_process_common+0x5d3/0xcc0\n    svc_process+0x2a3/0x320\n    nfsd+0x180/0x2e0\n    kthread+0x199/0x1d0\n    ret_from_fork+0x30/0x50\n    ret_from_fork_asm+0x1b/0x30\nunreferenced object 0xffff8881499f4d28 (size 368):\n  comm \"nfsd\", pid 2761, jiffies 4295044005 (age 5541.239s)\n  hex dump (first 32 bytes):\n    01 00 00 00 00 00 00 00 30 4d 9f 49 81 88 ff ff  ........0M.I....\n    30 4d 9f 49 81 88 ff ff 20 00 00 00 01 00 00 00  0M.I.... .......\n  backtrace:\n    kmem_cache_alloc+0x4b9/0x700\n    nfs4_alloc_stid+0x29/0x210\n    alloc_init_deleg+0x92/0x2e0\n    nfs4_set_delegation+0x284/0xc00\n    nfs4_open_delegation+0x216/0x3f0\n    nfsd4_process_open2+0x2b3/0xee0\n    nfsd4_open+0x770/0x9d0\n    nfsd4_proc_compound+0x7a2/0xe30\n    nfsd_dispatch+0x241/0x3e0\n    svc_process_common+0x5d3/0xcc0\n    svc_process+0x2a3/0x320\n    nfsd+0x180/0x2e0\n    kthread+0x199/0x1d0\n    ret_from_fork+0x30/0x50\n    ret_from_fork_asm+0x1b/0x30\nFix it by checking the result of nfsd4_run_cb and call nfs4_put_stid if\nfail to queue dl_recall.",
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