{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: lock overflowing for IOPOLL\n\nsyzbot reports an issue with overflow filling for IOPOLL:\n\nWARNING: CPU: 0 PID: 28 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\nCPU: 0 PID: 28 Comm: kworker/u4:1 Not tainted 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0\nWorkqueue: events_unbound io_ring_exit_work\nCall trace:\n io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\n io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773\n io_fill_cqe_req io_uring/io_uring.h:168 [inline]\n io_do_iopoll+0x474/0x62c io_uring/rw.c:1065\n io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513\n io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056\n io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869\n process_one_work+0x2d8/0x504 kernel/workqueue.c:2289\n worker_thread+0x340/0x610 kernel/workqueue.c:2436\n kthread+0x12c/0x158 kernel/kthread.c:376\n ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863\n\nThere is no real problem for normal IOPOLL as flush is also called with\nuring_lock taken, but it's getting more complicated for IOPOLL|SQPOLL,\nfor which __io_cqring_overflow_flush() happens from the CQ waiting path."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "io_uring/rw.c"
               ],
               "versions": [
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "de77faee2801",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "ed4629d1e968",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "7fc3990dad04",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "544d163d659d",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "io_uring/rw.c"
               ],
               "versions": [
                  {
                     "version": "5.10.165",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.89",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.7",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.2",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/de77faee280163ff03b7ab64af6c9d779a43d4c4"
            },
            {
               "url": "https://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845"
            },
            {
               "url": "https://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41b"
            },
            {
               "url": "https://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7"
            }
         ],
         "title": "io_uring: lock overflowing for IOPOLL",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52903",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}