diff --git a/.github/workflows/release-binaries.yml b/.github/workflows/release-binaries.yml
index ebf6fa41898dc4..e487b0f1d4b5d6 100644
--- a/.github/workflows/release-binaries.yml
+++ b/.github/workflows/release-binaries.yml
@@ -35,6 +35,7 @@ jobs:
   prepare:
     name: Prepare to build binaries
     runs-on: ubuntu-22.04
+    if: github.repository == 'llvm/llvm-project'
     outputs:
       release-version: ${{ steps.vars.outputs.release-version }}
       flags: ${{ steps.vars.outputs.flags }}
@@ -85,6 +86,7 @@ jobs:
     name: "Fill Cache ${{ matrix.os }}"
     needs: prepare
     runs-on: ${{ matrix.os }}
+    if: github.repository == 'llvm/llvm-project'
     strategy:
       matrix:
         os:
@@ -119,6 +121,7 @@ jobs:
       - prepare
       - fill-cache
     runs-on: ${{ matrix.target.runs-on }}
+    if: github.repository == 'llvm/llvm-project'
     strategy:
       fail-fast: false
       matrix:
diff --git a/clang/lib/StaticAnalyzer/Checkers/StreamChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
index 2ec47bf55df76b..10972158f39862 100644
--- a/clang/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
@@ -307,64 +307,64 @@ class StreamChecker : public Checker<check::PreCall, eval::Call,
       {{{"fclose"}, 1},
        {&StreamChecker::preDefault, &StreamChecker::evalFclose, 0}},
       {{{"fread"}, 4},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalFreadFwrite, _1, _2, _3, _4, true), 3}},
       {{{"fwrite"}, 4},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, false),
+       {&StreamChecker::preWrite,
         std::bind(&StreamChecker::evalFreadFwrite, _1, _2, _3, _4, false), 3}},
       {{{"fgetc"}, 1},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalFgetx, _1, _2, _3, _4, true), 0}},
       {{{"fgets"}, 3},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalFgetx, _1, _2, _3, _4, false), 2}},
       {{{"getc"}, 1},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalFgetx, _1, _2, _3, _4, true), 0}},
       {{{"fputc"}, 2},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, false),
+       {&StreamChecker::preWrite,
         std::bind(&StreamChecker::evalFputx, _1, _2, _3, _4, true), 1}},
       {{{"fputs"}, 2},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, false),
+       {&StreamChecker::preWrite,
         std::bind(&StreamChecker::evalFputx, _1, _2, _3, _4, false), 1}},
       {{{"putc"}, 2},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, false),
+       {&StreamChecker::preWrite,
         std::bind(&StreamChecker::evalFputx, _1, _2, _3, _4, true), 1}},
       {{{"fprintf"}},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, false),
+       {&StreamChecker::preWrite,
         std::bind(&StreamChecker::evalFprintf, _1, _2, _3, _4), 0}},
       {{{"vfprintf"}, 3},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, false),
+       {&StreamChecker::preWrite,
         std::bind(&StreamChecker::evalFprintf, _1, _2, _3, _4), 0}},
       {{{"fscanf"}},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalFscanf, _1, _2, _3, _4), 0}},
       {{{"vfscanf"}, 3},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalFscanf, _1, _2, _3, _4), 0}},
       {{{"ungetc"}, 2},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, false),
+       {&StreamChecker::preWrite,
         std::bind(&StreamChecker::evalUngetc, _1, _2, _3, _4), 1}},
       {{{"getdelim"}, 4},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalGetdelim, _1, _2, _3, _4), 3}},
       {{{"getline"}, 3},
-       {std::bind(&StreamChecker::preReadWrite, _1, _2, _3, _4, true),
+       {&StreamChecker::preRead,
         std::bind(&StreamChecker::evalGetdelim, _1, _2, _3, _4), 2}},
       {{{"fseek"}, 3},
        {&StreamChecker::preFseek, &StreamChecker::evalFseek, 0}},
       {{{"fseeko"}, 3},
        {&StreamChecker::preFseek, &StreamChecker::evalFseek, 0}},
       {{{"ftell"}, 1},
-       {&StreamChecker::preDefault, &StreamChecker::evalFtell, 0}},
+       {&StreamChecker::preWrite, &StreamChecker::evalFtell, 0}},
       {{{"ftello"}, 1},
-       {&StreamChecker::preDefault, &StreamChecker::evalFtell, 0}},
+       {&StreamChecker::preWrite, &StreamChecker::evalFtell, 0}},
       {{{"fflush"}, 1},
        {&StreamChecker::preFflush, &StreamChecker::evalFflush, 0}},
       {{{"rewind"}, 1},
        {&StreamChecker::preDefault, &StreamChecker::evalRewind, 0}},
       {{{"fgetpos"}, 2},
-       {&StreamChecker::preDefault, &StreamChecker::evalFgetpos, 0}},
+       {&StreamChecker::preWrite, &StreamChecker::evalFgetpos, 0}},
       {{{"fsetpos"}, 2},
        {&StreamChecker::preDefault, &StreamChecker::evalFsetpos, 0}},
       {{{"clearerr"}, 1},
@@ -384,12 +384,18 @@ class StreamChecker : public Checker<check::PreCall, eval::Call,
   CallDescriptionMap<FnDescription> FnTestDescriptions = {
       {{{"StreamTesterChecker_make_feof_stream"}, 1},
        {nullptr,
-        std::bind(&StreamChecker::evalSetFeofFerror, _1, _2, _3, _4, ErrorFEof),
+        std::bind(&StreamChecker::evalSetFeofFerror, _1, _2, _3, _4, ErrorFEof,
+                  false),
         0}},
       {{{"StreamTesterChecker_make_ferror_stream"}, 1},
        {nullptr,
         std::bind(&StreamChecker::evalSetFeofFerror, _1, _2, _3, _4,
-                  ErrorFError),
+                  ErrorFError, false),
+        0}},
+      {{{"StreamTesterChecker_make_ferror_indeterminate_stream"}, 1},
+       {nullptr,
+        std::bind(&StreamChecker::evalSetFeofFerror, _1, _2, _3, _4,
+                  ErrorFError, true),
         0}},
   };
 
@@ -415,8 +421,11 @@ class StreamChecker : public Checker<check::PreCall, eval::Call,
   void evalFclose(const FnDescription *Desc, const CallEvent &Call,
                   CheckerContext &C) const;
 
-  void preReadWrite(const FnDescription *Desc, const CallEvent &Call,
-                    CheckerContext &C, bool IsRead) const;
+  void preRead(const FnDescription *Desc, const CallEvent &Call,
+               CheckerContext &C) const;
+
+  void preWrite(const FnDescription *Desc, const CallEvent &Call,
+                CheckerContext &C) const;
 
   void evalFreadFwrite(const FnDescription *Desc, const CallEvent &Call,
                        CheckerContext &C, bool IsFread) const;
@@ -467,8 +476,8 @@ class StreamChecker : public Checker<check::PreCall, eval::Call,
                       const StreamErrorState &ErrorKind) const;
 
   void evalSetFeofFerror(const FnDescription *Desc, const CallEvent &Call,
-                         CheckerContext &C,
-                         const StreamErrorState &ErrorKind) const;
+                         CheckerContext &C, const StreamErrorState &ErrorKind,
+                         bool Indeterminate) const;
 
   void preFflush(const FnDescription *Desc, const CallEvent &Call,
                  CheckerContext &C) const;
@@ -849,9 +858,8 @@ void StreamChecker::evalFclose(const FnDescription *Desc, const CallEvent &Call,
   C.addTransition(E.bindReturnValue(State, C, *EofVal));
 }
 
-void StreamChecker::preReadWrite(const FnDescription *Desc,
-                                 const CallEvent &Call, CheckerContext &C,
-                                 bool IsRead) const {
+void StreamChecker::preRead(const FnDescription *Desc, const CallEvent &Call,
+                            CheckerContext &C) const {
   ProgramStateRef State = C.getState();
   SVal StreamVal = getStreamArg(Desc, Call);
   State = ensureStreamNonNull(StreamVal, Call.getArgExpr(Desc->StreamArgNo), C,
@@ -865,11 +873,6 @@ void StreamChecker::preReadWrite(const FnDescription *Desc,
   if (!State)
     return;
 
-  if (!IsRead) {
-    C.addTransition(State);
-    return;
-  }
-
   SymbolRef Sym = StreamVal.getAsSymbol();
   if (Sym && State->get<StreamMap>(Sym)) {
     const StreamState *SS = State->get<StreamMap>(Sym);
@@ -880,6 +883,24 @@ void StreamChecker::preReadWrite(const FnDescription *Desc,
   }
 }
 
+void StreamChecker::preWrite(const FnDescription *Desc, const CallEvent &Call,
+                             CheckerContext &C) const {
+  ProgramStateRef State = C.getState();
+  SVal StreamVal = getStreamArg(Desc, Call);
+  State = ensureStreamNonNull(StreamVal, Call.getArgExpr(Desc->StreamArgNo), C,
+                              State);
+  if (!State)
+    return;
+  State = ensureStreamOpened(StreamVal, C, State);
+  if (!State)
+    return;
+  State = ensureNoFilePositionIndeterminate(StreamVal, C, State);
+  if (!State)
+    return;
+
+  C.addTransition(State);
+}
+
 void StreamChecker::evalFreadFwrite(const FnDescription *Desc,
                                     const CallEvent &Call, CheckerContext &C,
                                     bool IsFread) const {
@@ -1496,14 +1517,16 @@ void StreamChecker::preDefault(const FnDescription *Desc, const CallEvent &Call,
 
 void StreamChecker::evalSetFeofFerror(const FnDescription *Desc,
                                       const CallEvent &Call, CheckerContext &C,
-                                      const StreamErrorState &ErrorKind) const {
+                                      const StreamErrorState &ErrorKind,
+                                      bool Indeterminate) const {
   ProgramStateRef State = C.getState();
   SymbolRef StreamSym = getStreamArg(Desc, Call).getAsSymbol();
   assert(StreamSym && "Operation not permitted on non-symbolic stream value.");
   const StreamState *SS = State->get<StreamMap>(StreamSym);
   assert(SS && "Stream should be tracked by the checker.");
   State = State->set<StreamMap>(
-      StreamSym, StreamState::getOpened(SS->LastOperation, ErrorKind));
+      StreamSym,
+      StreamState::getOpened(SS->LastOperation, ErrorKind, Indeterminate));
   C.addTransition(State);
 }
 
diff --git a/clang/test/Analysis/stream-error.c b/clang/test/Analysis/stream-error.c
index ac31083bfc691f..88f7de4234ffb4 100644
--- a/clang/test/Analysis/stream-error.c
+++ b/clang/test/Analysis/stream-error.c
@@ -11,6 +11,7 @@ void clang_analyzer_dump(int);
 void clang_analyzer_warnIfReached(void);
 void StreamTesterChecker_make_feof_stream(FILE *);
 void StreamTesterChecker_make_ferror_stream(FILE *);
+void StreamTesterChecker_make_ferror_indeterminate_stream(FILE *);
 
 void error_fopen(void) {
   FILE *F = fopen("file", "r");
@@ -52,6 +53,8 @@ void stream_error_feof(void) {
   clearerr(F);
   clang_analyzer_eval(feof(F));   // expected-warning {{FALSE}}
   clang_analyzer_eval(ferror(F)); // expected-warning {{FALSE}}
+  StreamTesterChecker_make_ferror_indeterminate_stream(F);
+  clang_analyzer_eval(feof(F));   // expected-warning {{FALSE}}
   fclose(F);
 }
 
@@ -65,6 +68,8 @@ void stream_error_ferror(void) {
   clearerr(F);
   clang_analyzer_eval(feof(F));   // expected-warning {{FALSE}}
   clang_analyzer_eval(ferror(F)); // expected-warning {{FALSE}}
+  StreamTesterChecker_make_ferror_indeterminate_stream(F);
+  clang_analyzer_eval(ferror(F)); // expected-warning {{TRUE}}
   fclose(F);
 }
 
@@ -233,7 +238,7 @@ void error_fscanf(int *A) {
   fscanf(F, "ccc"); // expected-warning {{Stream might be already closed}}
 }
 
-void error_ungetc() {
+void error_ungetc(int TestIndeterminate) {
   FILE *F = tmpfile();
   if (!F)
     return;
@@ -245,8 +250,12 @@ void error_ungetc() {
     clang_analyzer_eval(Ret == 'X');         // expected-warning {{TRUE}}
   }
   fputc('Y', F);                             // no-warning
+  if (TestIndeterminate) {
+    StreamTesterChecker_make_ferror_indeterminate_stream(F);
+    ungetc('X', F);                          // expected-warning {{might be 'indeterminate'}}
+  }
   fclose(F);
-  ungetc('A', F); // expected-warning {{Stream might be already closed}}
+  ungetc('A', F);                            // expected-warning {{Stream might be already closed}}
 }
 
 void error_getdelim(char *P, size_t Sz) {
@@ -449,7 +458,7 @@ void error_fseeko_0(void) {
   fclose(F);
 }
 
-void error_ftell(void) {
+void error_ftell(int TestIndeterminate) {
   FILE *F = fopen("file", "r");
   if (!F)
     return;
@@ -467,10 +476,14 @@ void error_ftell(void) {
   rc = ftell(F);
   clang_analyzer_eval(feof(F));              // expected-warning {{FALSE}}
   clang_analyzer_eval(ferror(F));            // expected-warning {{TRUE}}
+  if (TestIndeterminate) {
+    StreamTesterChecker_make_ferror_indeterminate_stream(F);
+    ftell(F);                                // expected-warning {{might be 'indeterminate'}}
+  }
   fclose(F);
 }
 
-void error_ftello(void) {
+void error_ftello(int TestIndeterminate) {
   FILE *F = fopen("file", "r");
   if (!F)
     return;
@@ -488,6 +501,10 @@ void error_ftello(void) {
   rc = ftello(F);
   clang_analyzer_eval(feof(F));              // expected-warning {{FALSE}}
   clang_analyzer_eval(ferror(F));            // expected-warning {{TRUE}}
+  if (TestIndeterminate) {
+    StreamTesterChecker_make_ferror_indeterminate_stream(F);
+    ftell(F);                                // expected-warning {{might be 'indeterminate'}}
+  }
   fclose(F);
 }
 
@@ -506,6 +523,8 @@ void error_fileno(void) {
   N = fileno(F);
   clang_analyzer_eval(feof(F));              // expected-warning {{FALSE}}
   clang_analyzer_eval(ferror(F));            // expected-warning {{TRUE}}
+  StreamTesterChecker_make_ferror_indeterminate_stream(F);
+  fileno(F);                                 // no warning
   fclose(F);
 }