[reactos] 03/12: [WINESYNC] msvcrt: Handle overflow in calloc().

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=1d6ec8555d98976f6492ad...

commit 1d6ec8555d98976f6492ad07a4ca304f1b404372
Author:     Timo Kreuzer [e-mail]
AuthorDate: Wed Apr 27 11:11:49 2016 +0300
Commit:     Timo Kreuzer [e-mail]
CommitDate: Thu Feb 2 14:58:08 2023 +0100

[WINESYNC] msvcrt: Handle overflow in calloc().

Signed-off-by: Nikolay Sivov [e-mail]
    Signed-off-by: Piotr Caban [e-mail]
    Signed-off-by: Alexandre Julliard [e-mail]

wine commit id 50dd4b892825c75db35cd1f378291b51fa782f3e by Nikolay Sivov [e-mail]
---
 sdk/lib/crt/wine/heap.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/sdk/lib/crt/wine/heap.c b/sdk/lib/crt/wine/heap.c
index 5cf7d6bd4ee..1b7eb529f31 100644
--- a/sdk/lib/crt/wine/heap.c
+++ b/sdk/lib/crt/wine/heap.c
@@ -418,7 +418,15 @@ size_t CDECL _aligned_msize(void *p, MSVCRT_size_t alignment, MSVCRT_size_t offs
  */
 void* CDECL MSVCRT_calloc(MSVCRT_size_t count, MSVCRT_size_t size)
 {
-  return msvcrt_heap_alloc(HEAP_ZERO_MEMORY, count*size);
+  MSVCRT_size_t bytes = count*size;
+
+  if (size && bytes / size != count)
+  {
+    *MSVCRT__errno() = MSVCRT_ENOMEM;
+    return NULL;
+  }
+
+  return msvcrt_heap_alloc(HEAP_ZERO_MEMORY, bytes);
 }

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