fkie_cve-2022-50092
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-06-18 13:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: dm thin: fix use-after-free crash in dm_sm_register_threshold_callback Fault inject on pool metadata device reports: BUG: KASAN: use-after-free in dm_pool_register_metadata_threshold+0x40/0x80 Read of size 8 at addr ffff8881b9d50068 by task dmsetup/950 CPU: 7 PID: 950 Comm: dmsetup Tainted: G W 5.19.0-rc6 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x34/0x44 print_address_description.constprop.0.cold+0xeb/0x3f4 kasan_report.cold+0xe6/0x147 dm_pool_register_metadata_threshold+0x40/0x80 pool_ctr+0xa0a/0x1150 dm_table_add_target+0x2c8/0x640 table_load+0x1fd/0x430 ctl_ioctl+0x2c4/0x5a0 dm_ctl_ioctl+0xa/0x10 __x64_sys_ioctl+0xb3/0xd0 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 This can be easily reproduced using: echo offline > /sys/block/sda/device/state dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10 dmsetup load pool --table "0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0" If a metadata commit fails, the transaction will be aborted and the metadata space maps will be destroyed. If a DM table reload then happens for this failed thin-pool, a use-after-free will occur in dm_sm_register_threshold_callback (called from dm_pool_register_metadata_threshold). Fix this by in dm_pool_register_metadata_threshold() by returning the -EINVAL error if the thin-pool is in fail mode. Also fail pool_ctr() with a new error message: "Error registering metadata threshold".
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm thin: fix use-after-free crash in dm_sm_register_threshold_callback\n\nFault inject on pool metadata device reports:\n  BUG: KASAN: use-after-free in dm_pool_register_metadata_threshold+0x40/0x80\n  Read of size 8 at addr ffff8881b9d50068 by task dmsetup/950\n\n  CPU: 7 PID: 950 Comm: dmsetup Tainted: G        W         5.19.0-rc6 #1\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x34/0x44\n   print_address_description.constprop.0.cold+0xeb/0x3f4\n   kasan_report.cold+0xe6/0x147\n   dm_pool_register_metadata_threshold+0x40/0x80\n   pool_ctr+0xa0a/0x1150\n   dm_table_add_target+0x2c8/0x640\n   table_load+0x1fd/0x430\n   ctl_ioctl+0x2c4/0x5a0\n   dm_ctl_ioctl+0xa/0x10\n   __x64_sys_ioctl+0xb3/0xd0\n   do_syscall_64+0x35/0x80\n   entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThis can be easily reproduced using:\n  echo offline \u003e /sys/block/sda/device/state\n  dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10\n  dmsetup load pool --table \"0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0\"\n\nIf a metadata commit fails, the transaction will be aborted and the\nmetadata space maps will be destroyed. If a DM table reload then\nhappens for this failed thin-pool, a use-after-free will occur in\ndm_sm_register_threshold_callback (called from\ndm_pool_register_metadata_threshold).\n\nFix this by in dm_pool_register_metadata_threshold() by returning the\n-EINVAL error if the thin-pool is in fail mode. Also fail pool_ctr()\nwith a new error message: \"Error registering metadata threshold\"."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dm thin: correcci\u00f3n del fallo de uso tras liberaci\u00f3n en dm_sm_register_threshold_callback Se informa de un fallo por inyecci\u00f3n en el dispositivo de metadatos del grupo: ERROR: KASAN: uso tras liberaci\u00f3n en dm_pool_register_metadata_threshold+0x40/0x80 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8881b9d50068 por la tarea dmsetup/950 CPU: 7 PID: 950 Comm: dmsetup Contaminado: GW 5.19.0-rc6 #1 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 01/04/2014 Rastreo de llamadas:  dump_stack_lvl+0x34/0x44 print_address_description.constprop.0.cold+0xeb/0x3f4 kasan_report.cold+0xe6/0x147 dm_pool_register_metadata_threshold+0x40/0x80 pool_ctr+0xa0a/0x1150 dm_table_add_target+0x2c8/0x640 table_load+0x1fd/0x430 ctl_ioctl+0x2c4/0x5a0 dm_ctl_ioctl+0xa/0x10 __x64_sys_ioctl+0xb3/0xd0 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Esto se puede reproducir f\u00e1cilmente usando: echo offline \u0026gt; /sys/block/sda/device/state dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10 dmsetup load pool --table \"0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0\" Si falla una confirmaci\u00f3n de metadatos, la transacci\u00f3n se cancelar\u00e1 y los mapas de espacio de metadatos se destruir\u00e1n. Si se recarga la tabla DM para este thin-pool fallido, se ejecutar\u00e1 un \"use after-free\" en dm_sm_register_threshold_callback (llamado desde dm_pool_register_metadata_threshold). Solucione esto en dm_pool_register_metadata_threshold() devolviendo el error -EINVAL si el thin-pool est\u00e1 en modo de fallo. Tambi\u00e9n se produce un error en pool_ctr() con un nuevo mensaje de error: \"Error al registrar el umbral de metadatos\"."
    }
  ],
  "id": "CVE-2022-50092",
  "lastModified": "2025-06-18T13:47:40.833",
  "metrics": {},
  "published": "2025-06-18T11:15:38.383",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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