From: Alex Tutubalin <lexa@lexa.ru>
Date: Sun, 2 Mar 2025 11:35:43 +0300
Subject: additional checks in PhaseOne correction tag 0x412 processing

(cherry picked from commit a50dc3f1127d2e37a9b39f57ad9bb2ebb60f18c0)
---
 src/decoders/load_mfbacks.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/decoders/load_mfbacks.cpp b/src/decoders/load_mfbacks.cpp
index 61eedeb..db0dc74 100644
--- a/src/decoders/load_mfbacks.cpp
+++ b/src/decoders/load_mfbacks.cpp
@@ -336,6 +336,8 @@ int LibRaw::phase_one_correct()
 	  unsigned w0 = head[1] * head[3], w1 = head[2] * head[4];
 	  if (w0 > 10240000 || w1 > 10240000)
 		  throw LIBRAW_EXCEPTION_ALLOC;
+	  if (w0 < 1 || w1 < 1)
+		  throw LIBRAW_EXCEPTION_IO_CORRUPT;
       yval[0] = (float *)calloc(head[1] * head[3] + head[2] * head[4], 6);
       merror(yval[0], "phase_one_correct()");
       yval[1] = (float *)(yval[0] + head[1] * head[3]);