From 68ca83f2f8260b20ec7d6875ecb610417bf48f50 Mon Sep 17 00:00:00 2001
From: wwqgtxx <wwqgtxx@gmail.com>
Date: Mon, 9 Mar 2026 14:19:23 +0800
Subject: [PATCH] fix: windows crash for golang1.26 on WSARecvFrom syscall

---
 .../{cl747663.patch => issue77731.patch}      |  0
 .github/patch/issue77975.patch                | 55 +++++++++++++++++++
 .github/workflows/build.yml                   | 13 ++++-
 .github/workflows/test.yml                    |  7 +++
 4 files changed, 72 insertions(+), 3 deletions(-)
 rename .github/patch/{cl747663.patch => issue77731.patch} (100%)
 create mode 100644 .github/patch/issue77975.patch

diff --git a/.github/patch/cl747663.patch b/.github/patch/issue77731.patch
similarity index 100%
rename from .github/patch/cl747663.patch
rename to .github/patch/issue77731.patch
diff --git a/.github/patch/issue77975.patch b/.github/patch/issue77975.patch
new file mode 100644
index 00000000..64079e2b
--- /dev/null
+++ b/.github/patch/issue77975.patch
@@ -0,0 +1,55 @@
+Subject: [PATCH] move lpFromlen to heap for WSARecvFrom syscall
+---
+Index: src/internal/poll/fd_windows.go
+IDEA additional info:
+Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
+<+>UTF-8
+===================================================================
+diff --git a/src/internal/poll/fd_windows.go b/src/internal/poll/fd_windows.go
+--- a/src/internal/poll/fd_windows.go	(revision 8149d992682ce76c6af804b507878e19fc966f7b)
++++ b/src/internal/poll/fd_windows.go	(revision 25efab96145f416bbae4024e9c110429770b22d1)
+@@ -76,6 +76,8 @@
+ 	// fields used by runtime.netpoll
+ 	runtimeCtx uintptr
+ 	mode       int32
++
++	rsan int32
+ }
+
+ func (fd *FD) overlapped(o *operation) *syscall.Overlapped {
+@@ -740,9 +742,9 @@
+ 	rsa := wsaRsaPool.Get().(*syscall.RawSockaddrAny)
+ 	defer wsaRsaPool.Put(rsa)
+ 	n, err := fd.execIO('r', func(o *operation) (qty uint32, err error) {
+-		rsan := int32(unsafe.Sizeof(*rsa))
++		o.rsan = int32(unsafe.Sizeof(*rsa))
+ 		var flags uint32
+-		err = syscall.WSARecvFrom(fd.Sysfd, newWsaBuf(buf), 1, &qty, &flags, rsa, &rsan, &o.o, nil)
++		err = syscall.WSARecvFrom(fd.Sysfd, newWsaBuf(buf), 1, &qty, &flags, rsa, &o.rsan, &o.o, nil)
+ 		return qty, err
+ 	})
+ 	err = fd.eofError(n, err)
+@@ -771,9 +773,9 @@
+ 	rsa := wsaRsaPool.Get().(*syscall.RawSockaddrAny)
+ 	defer wsaRsaPool.Put(rsa)
+ 	n, err := fd.execIO('r', func(o *operation) (qty uint32, err error) {
+-		rsan := int32(unsafe.Sizeof(*rsa))
++		o.rsan = int32(unsafe.Sizeof(*rsa))
+ 		var flags uint32
+-		err = syscall.WSARecvFrom(fd.Sysfd, newWsaBuf(buf), 1, &qty, &flags, rsa, &rsan, &o.o, nil)
++		err = syscall.WSARecvFrom(fd.Sysfd, newWsaBuf(buf), 1, &qty, &flags, rsa, &o.rsan, &o.o, nil)
+ 		return qty, err
+ 	})
+ 	err = fd.eofError(n, err)
+@@ -802,9 +804,9 @@
+ 	rsa := wsaRsaPool.Get().(*syscall.RawSockaddrAny)
+ 	defer wsaRsaPool.Put(rsa)
+ 	n, err := fd.execIO('r', func(o *operation) (qty uint32, err error) {
+-		rsan := int32(unsafe.Sizeof(*rsa))
++		o.rsan = int32(unsafe.Sizeof(*rsa))
+ 		var flags uint32
+-		err = syscall.WSARecvFrom(fd.Sysfd, newWsaBuf(buf), 1, &qty, &flags, rsa, &rsan, &o.o, nil)
++		err = syscall.WSARecvFrom(fd.Sysfd, newWsaBuf(buf), 1, &qty, &flags, rsa, &o.rsan, &o.o, nil)
+ 		return qty, err
+ 	})
+ 	err = fd.eofError(n, err)
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d5b55fd6..48ef8d5f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -179,12 +179,19 @@ jobs:
         tar zxf go1.26.0.linux-amd64-abi1.tar.gz -C $HOME/usr/local
         echo "$HOME/usr/local/go/bin" >> $GITHUB_PATH
 
-      # TODO: remove after CL747663 merged, see: https://github.com/golang/go/issues/77731
-    - name: Apply CL747663 for Golang1.26
+      # TODO: remove after issue77731 merged, see: https://github.com/golang/go/issues/77731
+    - name: Apply issue77731 for Golang1.26
       if: ${{ matrix.jobs.goversion == '' }}
       run: |
         cd $(go env GOROOT)
-        patch --verbose -p 1 < $GITHUB_WORKSPACE/.github/patch/cl747663.patch
+        patch --verbose -p 1 < $GITHUB_WORKSPACE/.github/patch/issue77731.patch
+
+      # TODO: remove after issue77975 fixed, see: https://github.com/golang/go/issues/77975
+    - name: Fix issue77975 for Golang1.26
+      if: ${{ matrix.jobs.goversion == '' }}
+      run: |
+        cd $(go env GOROOT)
+        patch --verbose -p 1 < $GITHUB_WORKSPACE/.github/patch/issue77975.patch
 
       # this patch file only works on golang1.26.x
       # that means after golang1.27 release it must be changed
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 064507bc..052ee965 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -50,6 +50,13 @@ jobs:
           go-version: ${{ matrix.go-version }}
           check-latest: true # Always check for the latest patch release
 
+      # TODO: remove after issue77975 fixed, see: https://github.com/golang/go/issues/77975
+      - name: Fix issue77975 for Golang1.26
+        if: ${{ matrix.jobs.goversion == '1.26' }}
+        run: |
+          cd $(go env GOROOT)
+          patch --verbose -p 1 < $GITHUB_WORKSPACE/.github/patch/issue77975.patch
+
       - name: Revert Golang commit for Windows7/8
         if: ${{ runner.os == 'Windows' && matrix.go-version != '1.20' }}
         run: |