{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: Don't register sync_thread for reshape directly\n\nCurrently, if reshape is interrupted, then reassemble the array will\nregister sync_thread directly from pers->run(), in this case\n'MD_RECOVERY_RUNNING' is set directly, however, there is no guarantee\nthat md_do_sync() will be executed, hence stop_sync_thread() will hang\nbecause 'MD_RECOVERY_RUNNING' can't be cleared.\n\nLast patch make sure that md_do_sync() will set MD_RECOVERY_DONE,\nhowever, following hang can still be triggered by dm-raid test\nshell/lvconvert-raid-reshape.sh occasionally:\n\n[root@fedora ~]# cat /proc/1982/stack\n[<0>] stop_sync_thread+0x1ab/0x270 [md_mod]\n[<0>] md_frozen_sync_thread+0x5c/0xa0 [md_mod]\n[<0>] raid_presuspend+0x1e/0x70 [dm_raid]\n[<0>] dm_table_presuspend_targets+0x40/0xb0 [dm_mod]\n[<0>] __dm_destroy+0x2a5/0x310 [dm_mod]\n[<0>] dm_destroy+0x16/0x30 [dm_mod]\n[<0>] dev_remove+0x165/0x290 [dm_mod]\n[<0>] ctl_ioctl+0x4bb/0x7b0 [dm_mod]\n[<0>] dm_ctl_ioctl+0x11/0x20 [dm_mod]\n[<0>] vfs_ioctl+0x21/0x60\n[<0>] __x64_sys_ioctl+0xb9/0xe0\n[<0>] do_syscall_64+0xc6/0x230\n[<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74\n\nMeanwhile mddev->recovery is:\nMD_RECOVERY_RUNNING |\nMD_RECOVERY_INTR |\nMD_RECOVERY_RESHAPE |\nMD_RECOVERY_FROZEN\n\nFix this problem by remove the code to register sync_thread directly\nfrom raid10 and raid5. And let md_check_recovery() to register\nsync_thread."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/md/md.c",
                  "drivers/md/raid10.c",
                  "drivers/md/raid5.c"
               ],
               "versions": [
                  {
                     "version": "f67055780caa",
                     "lessThan": "13b520fb62b7",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "f67055780caa",
                     "lessThan": "ad39c08186f8",
                     "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/md/md.c",
                  "drivers/md/raid10.c",
                  "drivers/md/raid5.c"
               ],
               "versions": [
                  {
                     "version": "2.6.17",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.17",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.7",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/13b520fb62b772e408f9b79c5fe18ad414e90417"
            },
            {
               "url": "https://git.kernel.org/stable/c/ad39c08186f8a0f221337985036ba86731d6aafe"
            }
         ],
         "title": "md: Don't register sync_thread for reshape directly",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-26756",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}