{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx5: Fix init stage error handling to avoid double free of same QP and UAF\n\nIn the unlikely event that workqueue allocation fails and returns NULL in\nmlx5_mkey_cache_init(), delete the call to\nmlx5r_umr_resource_cleanup() (which frees the QP) in\nmlx5_ib_stage_post_ib_reg_umr_init().  This will avoid attempted double\nfree of the same QP when __mlx5_ib_add() does its cleanup.\n\nResolves a splat:\n\n   Syzkaller reported a UAF in ib_destroy_qp_user\n\n   workqueue: Failed to create a rescuer kthread for wq \"mkey_cache\": -EINTR\n   infiniband mlx5_0: mlx5_mkey_cache_init:981:(pid 1642):\n   failed to create work queue\n   infiniband mlx5_0: mlx5_ib_stage_post_ib_reg_umr_init:4075:(pid 1642):\n   mr cache init failed -12\n   ==================================================================\n   BUG: KASAN: slab-use-after-free in ib_destroy_qp_user (drivers/infiniband/core/verbs.c:2073)\n   Read of size 8 at addr ffff88810da310a8 by task repro_upstream/1642\n\n   Call Trace:\n   <TASK>\n   kasan_report (mm/kasan/report.c:590)\n   ib_destroy_qp_user (drivers/infiniband/core/verbs.c:2073)\n   mlx5r_umr_resource_cleanup (drivers/infiniband/hw/mlx5/umr.c:198)\n   __mlx5_ib_add (drivers/infiniband/hw/mlx5/main.c:4178)\n   mlx5r_probe (drivers/infiniband/hw/mlx5/main.c:4402)\n   ...\n   </TASK>\n\n   Allocated by task 1642:\n   __kmalloc (./include/linux/kasan.h:198 mm/slab_common.c:1026\n   mm/slab_common.c:1039)\n   create_qp (./include/linux/slab.h:603 ./include/linux/slab.h:720\n   ./include/rdma/ib_verbs.h:2795 drivers/infiniband/core/verbs.c:1209)\n   ib_create_qp_kernel (drivers/infiniband/core/verbs.c:1347)\n   mlx5r_umr_resource_init (drivers/infiniband/hw/mlx5/umr.c:164)\n   mlx5_ib_stage_post_ib_reg_umr_init (drivers/infiniband/hw/mlx5/main.c:4070)\n   __mlx5_ib_add (drivers/infiniband/hw/mlx5/main.c:4168)\n   mlx5r_probe (drivers/infiniband/hw/mlx5/main.c:4402)\n   ...\n\n   Freed by task 1642:\n   __kmem_cache_free (mm/slub.c:1826 mm/slub.c:3809 mm/slub.c:3822)\n   ib_destroy_qp_user (drivers/infiniband/core/verbs.c:2112)\n   mlx5r_umr_resource_cleanup (drivers/infiniband/hw/mlx5/umr.c:198)\n   mlx5_ib_stage_post_ib_reg_umr_init (drivers/infiniband/hw/mlx5/main.c:4076\n   drivers/infiniband/hw/mlx5/main.c:4065)\n   __mlx5_ib_add (drivers/infiniband/hw/mlx5/main.c:4168)\n   mlx5r_probe (drivers/infiniband/hw/mlx5/main.c:4402)\n   ..."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/infiniband/hw/mlx5/main.c"
               ],
               "versions": [
                  {
                     "version": "04876c12c19e",
                     "lessThan": "437f033e30c8",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "04876c12c19e",
                     "lessThan": "4f4a7a7d1404",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "04876c12c19e",
                     "lessThan": "6387f269d84e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "04876c12c19e",
                     "lessThan": "2ef422f063b7",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/infiniband/hw/mlx5/main.c"
               ],
               "versions": [
                  {
                     "version": "5.19",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.19",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.63",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.5.12",
                     "lessThanOrEqual": "6.5.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.2",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/437f033e30c897bb3723eac9e9003cd9f88d00a3"
            },
            {
               "url": "https://git.kernel.org/stable/c/4f4a7a7d1404297f2a92df0046f7e64dc5c52dd9"
            },
            {
               "url": "https://git.kernel.org/stable/c/6387f269d84e6e149499408c4d1fc805017729b2"
            },
            {
               "url": "https://git.kernel.org/stable/c/2ef422f063b74adcc4a4a9004b0a87bb55e0a836"
            }
         ],
         "title": "IB/mlx5: Fix init stage error handling to avoid double free of same QP and UAF",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52851",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}