[compiler-rt] 957af73 - [sanitizer] Add CHECKs to validate calculated TLS range (#107941)

[via llvm-commits]

Author: Vitaly Buka
Date: 2024-09-10T15:07:13-07:00
New Revision: 957af7373881e62eec34ca87106fa2a2c2391d8e

URL: https://github.com/llvm/llvm-project/commit/957af7373881e62eec34ca87106fa2a2c2391d8e
DIFF: https://github.com/llvm/llvm-project/commit/957af7373881e62eec34ca87106fa2a2c2391d8e.diff

LOG: [sanitizer] Add CHECKs to validate calculated TLS range (#107941)

Added: 
    

Modified: 
    compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp

Removed: 
    


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diff  --git a/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp
index 666e6f3b351067..a1107ff7d24737 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp
@@ -151,6 +151,10 @@ DTLS::DTV *DTLS_on_tls_get_addr(void *arg_void, void *res,
     // This may happen inside the DTOR of main thread, so just ignore it.
     tls_size = 0;
   }
+  if (tls_size) {
+    CHECK_LE(tls_beg, reinterpret_cast<uptr>(res));
+    CHECK_LT(reinterpret_cast<uptr>(res), tls_beg + tls_size);
+  }
   dtv->beg = tls_beg;
   dtv->size = tls_size;
   return dtv;