mgr/devicehealth: skip null pages when extracting wear level

Some devices have null pages in their ata_device_statistics struct; skip
those pages in order to avoid an AttributeError when extracting device's
wear level.

Fixes: https://tracker.ceph.com/issues/51554
Signed-off-by: Yaarit Hatuka <yaarit@redhat.com>
(cherry picked from commit 2864ac30d4170ba7b5f60ae01ecfdeee707e026a)

diff --git a/src/pybind/mgr/devicehealth/module.py b/src/pybind/mgr/devicehealth/module.py
index 44ca3bab8819ed451a6b3addfe8048621e42fbe3..110e00bf7efc844725a5ecbf7964dc3859c16a47 100644 (file)
--- a/src/pybind/mgr/devicehealth/module.py
+++ b/src/pybind/mgr/devicehealth/module.py
@@ -30,7 +30,7 @@ def get_ata_wear_level(data: Dict[Any,Any]) -> Optional[float]:
     Extract wear level (as float) from smartctl -x --json output for SATA SSD
     """
     for page in data.get("ata_device_statistics", {}).get("pages", []):
-        if page.get("number") != 7:
+        if page is None or page.get("number") != 7:
             continue
         for item in page.get("table", []):
             if item["offset"] == 8: