From 9fd20c306f3027882a03826d89015d9551ea32d5 Mon Sep 17 00:00:00 2001
From: Christian Hergert <chergert@redhat.com>
Date: Thu, 6 Jul 2023 10:18:52 -0700
Subject: [PATCH] libsysprof-analyze: warn on non-aligned or short-frames

And bail doing any further processing on the capture.
---
 src/libsysprof-analyze/sysprof-document.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/libsysprof-analyze/sysprof-document.c b/src/libsysprof-analyze/sysprof-document.c
index 5ec368ae..36844342 100644
--- a/src/libsysprof-analyze/sysprof-document.c
+++ b/src/libsysprof-analyze/sysprof-document.c
@@ -841,7 +841,17 @@ sysprof_document_load_worker (GTask        *task,
         frame_len = GUINT16_SWAP_LE_BE (frame_len);
 
       if (frame_len < sizeof (SysprofCaptureFrame))
-        break;
+        {
+          g_warning ("Capture contained implausibly short frame");
+          break;
+        }
+
+      if (frame_len % SYSPROF_CAPTURE_ALIGN != 0)
+        {
+          g_warning ("Capture contained frame not aligned to %u",
+                     (guint)SYSPROF_CAPTURE_ALIGN);
+          break;
+        }
 
       ptr.offset = pos;
       ptr.length = frame_len;