Avoid segfault for processes that use hundreds of GBs of memory (#2497)

giampaolo · Jan 12, 2025 · d4b37d9 · d4b37d9
1 parent ed1d425
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diff --git a/CREDITS b/CREDITS
@@ -840,3 +840,7 @@ N: Aleksey Lobanov
 C: Russia
 E: [email protected]
 W: https://github.com/AlekseyLobanov
+
+N: Will Hawes
+W: https://github.com/wdh
+I: 2496
diff --git a/HISTORY.rst b/HISTORY.rst
@@ -13,6 +13,11 @@ XXXX-XX-XX
   deprecated in psutil 4.0.0, released 8 years ago. Substitute is
   ``Process.memory_full_info()``.
 
+**Bug fixes**
+
+- 2496_, [Linux]: Avoid segfault (a cPython bug) on ``Process.memory_maps()`` 
+  for processes that use hundreds of GBs of memory.
+
 **Compatibility notes**
 
 - 2480_: Python 2.7 is no longer supported.

diff --git a/psutil/__init__.py b/psutil/__init__.py
@@ -1193,7 +1193,7 @@ def memory_maps(self, grouped=True):
                     path = tupl[2]
                     nums = tupl[3:]
                     try:
-                        d[path] = map(lambda x, y: x + y, d[path], nums)
+                        d[path] = list(map(lambda x, y: x + y, d[path], nums))
                     except KeyError:
                         d[path] = nums
                 nt = _psplatform.pmmap_grouped