{
  "id": "CVE-2022-48884",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-08-21T07:15:04.987",
  "lastModified": "2024-08-21T12:30:33.697",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix command stats access after free\n\nCommand may fail while driver is reloading and can't accept FW commands\ntill command interface is reinitialized. Such command failure is being\nlogged to command stats. This results in NULL pointer access as command\nstats structure is being freed and reallocated during mlx5 devlink\nreload (see kernel log below).\n\nFix it by making command stats statically allocated on driver probe.\n\nKernel log:\n[ 2394.808802] BUG: unable to handle kernel paging request at 000000000002a9c0\n[ 2394.810610] PGD 0 P4D 0\n[ 2394.811811] Oops: 0002 [#1] SMP NOPTI\n...\n[ 2394.815482] RIP: 0010:native_queued_spin_lock_slowpath+0x183/0x1d0\n...\n[ 2394.829505] Call Trace:\n[ 2394.830667]  _raw_spin_lock_irq+0x23/0x26\n[ 2394.831858]  cmd_status_err+0x55/0x110 [mlx5_core]\n[ 2394.833020]  mlx5_access_reg+0xe7/0x150 [mlx5_core]\n[ 2394.834175]  mlx5_query_port_ptys+0x78/0xa0 [mlx5_core]\n[ 2394.835337]  mlx5e_ethtool_get_link_ksettings+0x74/0x590 [mlx5_core]\n[ 2394.836454]  ? kmem_cache_alloc_trace+0x140/0x1c0\n[ 2394.837562]  __rh_call_get_link_ksettings+0x33/0x100\n[ 2394.838663]  ? __rtnl_unlock+0x25/0x50\n[ 2394.839755]  __ethtool_get_link_ksettings+0x72/0x150\n[ 2394.840862]  duplex_show+0x6e/0xc0\n[ 2394.841963]  dev_attr_show+0x1c/0x40\n[ 2394.843048]  sysfs_kf_seq_show+0x9b/0x100\n[ 2394.844123]  seq_read+0x153/0x410\n[ 2394.845187]  vfs_read+0x91/0x140\n[ 2394.846226]  ksys_read+0x4f/0xb0\n[ 2394.847234]  do_syscall_64+0x5b/0x1a0\n[ 2394.848228]  entry_SYSCALL_64_after_hwframe+0x65/0xca"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/mlx5: corrige el acceso a las estad\u00edsticas de los comandos despu\u00e9s de liberarlos. El comando puede fallar mientras se recarga el controlador y no puede aceptar comandos de firmware hasta que se reinicialice la interfaz de comandos. Dicho error de comando se registra en las estad\u00edsticas de comando. Esto da como resultado un acceso al puntero NULL a medida que la estructura de estad\u00edsticas de comando se libera y reasigna durante la recarga de mlx5 devlink (consulte el registro del kernel a continuaci\u00f3n). Solucionelo haciendo que las estad\u00edsticas de comando se asignen est\u00e1ticamente en la sonda del controlador. Registro del kernel: [2394.808802] ERROR: no se puede manejar la solicitud de paginaci\u00f3n del kernel en 000000000002a9c0 [2394.810610] PGD 0 P4D 0 [2394.811811] Vaya: 0002 [#1] SMP NOPTI... [2394.815482] RIP: 10:native_queued_spin_lock_slowpath+0x183/0x1d0 ... [2394.829505] Seguimiento de llamadas: [2394.830667] _raw_spin_lock_irq+0x23/0x26 [2394.831858] cmd_status_err+0x55/0x110 [mlx5_core] [2394.833020] mlx5_access_reg+0xe7/0x1 50 [mlx5_core] [2394.834175] mlx5_query_port_ptys+0x78/0xa0 [mlx5_core] [2394.835337] mlx5e_ethtool_get_link_ksettings+0x74/0x590 [mlx5_core] [2394.836454]? kmem_cache_alloc_trace+0x140/0x1c0 [ 2394.837562] __rh_call_get_link_ksettings+0x33/0x100 [ 2394.838663] ? __rtnl_unlock+0x25/0x50 [ 2394.839755] __ethtool_get_link_ksettings+0x72/0x150 [ 2394.840862] duplex_show+0x6e/0xc0 [ 2394.841963] dev_attr_show+0x1c/0x40 [ 2394.8 43048] sysfs_kf_seq_show+0x9b/0x100 [ 2394.844123] seq_read+0x153/0x410 [ 2394.845187] vfs_read+ 0x91/0x140 [ 2394.846226] ksys_read+0x4f/0xb0 [ 2394.847234] do_syscall_64+0x5b/0x1a0 [ 2394.848228] entrada_SYSCALL_64_after_hwframe+0x65/0xca"
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/da2e552b469a0cd130ff70a88ccc4139da428a65",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ddf458641a511e7dff19f3bf0cbbc5dd9fe08ce5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}