From 46f2fa17be9768ec2647988b0446dd848b833a5b Mon Sep 17 00:00:00 2001
From: PavlNekrasov <95914807+PavlNekrasov@users.noreply.github.com>
Date: Thu, 19 Sep 2024 22:53:45 +0300
Subject: [PATCH 1/2] fix dereference before checking for NULL  in the
 `ImagingTransformAffine` function

The `imIn` pointer is checked for `NULL`, but it seems to be dereferenced before this check. You must first make sure that the pointer is not `NULL` before using it.
---
 src/libImaging/Geometry.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/libImaging/Geometry.c b/src/libImaging/Geometry.c
index 2bfeed7b6..264c7d169 100644
--- a/src/libImaging/Geometry.c
+++ b/src/libImaging/Geometry.c
@@ -1035,6 +1035,10 @@ ImagingTransformAffine(
     double xx, yy;
     double xo, yo;
 
+    if (!imOut || !imIn || strcmp(imIn->mode, imOut->mode) != 0) {
+        return (Imaging)ImagingError_ModeError();
+    }    
+
     if (filterid || imIn->type == IMAGING_TYPE_SPECIAL) {
         return ImagingGenericTransform(
             imOut, imIn, x0, y0, x1, y1, affine_transform, a, filterid, fill
@@ -1046,10 +1050,6 @@ ImagingTransformAffine(
         return ImagingScaleAffine(imOut, imIn, x0, y0, x1, y1, a, fill);
     }
 
-    if (!imOut || !imIn || strcmp(imIn->mode, imOut->mode) != 0) {
-        return (Imaging)ImagingError_ModeError();
-    }
-
     if (x0 < 0) {
         x0 = 0;
     }

From 9424b1a8920201b52086c0b06b5148db33255668 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Thu, 19 Sep 2024 19:59:08 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 src/libImaging/Geometry.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libImaging/Geometry.c b/src/libImaging/Geometry.c
index 264c7d169..84aa442f0 100644
--- a/src/libImaging/Geometry.c
+++ b/src/libImaging/Geometry.c
@@ -1037,7 +1037,7 @@ ImagingTransformAffine(
 
     if (!imOut || !imIn || strcmp(imIn->mode, imOut->mode) != 0) {
         return (Imaging)ImagingError_ModeError();
-    }    
+    }
 
     if (filterid || imIn->type == IMAGING_TYPE_SPECIAL) {
         return ImagingGenericTransform(