[clang] [clang][Sema] Stop format size estimator upon %p to adapt to linux kernel's extension (PR #65969)

[Nick Desaulniers via cfe-commits]

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@@ -163,6 +163,10 @@ Improvements to Clang's diagnostics
 - Clang's ``-Wfortify-source`` now diagnoses ``snprintf`` call that is known to
   result in string truncation.
   (`#64871: <https://github.com/llvm/llvm-project/issues/64871>`_).
+  Clang stops calculating the minimum length of the output format string upon %p
+  if the succeeding character can be a part of the format specifier in linux's
+  format extension in order to avoid false positive warnings against the linux
+  code base.
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nickdesaulniers wrote:

perhaps worth referring to "the Linux kernel's ..." rather than just "linux".

https://github.com/llvm/llvm-project/pull/65969