Merge tag 'perf-tools-fixes-for-v6.2-3-2023-01-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Prevent reading into undefined memory in the expression lexer,
   accounting for a trailer backslash followed by the null byte.

 - Fix file mode when copying files to the build id cache, the problem
   happens when the cache directory is in a different file system than
   the file being cached, otherwise the mode was preserved as only a
   hard link would be done to save space.

 - Fix a related build-id 'perf test' entry that checked that permission
   when caching PE (Portable Executable) files, used when profiling
   Windows executables under wine.

 - Sync the tools/ copies of kvm headers, build_bug.h, socket.h and
   arm64's cputype.h with the kernel sources.

* tag 'perf-tools-fixes-for-v6.2-3-2023-01-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf test build-id: Fix test check for PE file
  perf buildid-cache: Fix the file mode with copyfile() while adding file to build-id cache
  perf expr: Prevent normalize() from reading into undefined memory in the expression lexer
  tools headers: Syncronize linux/build_bug.h with the kernel sources
  perf beauty: Update copy of linux/socket.h with the kernel sources
  tools headers arm64: Sync arm64's cputype.h with the kernel sources
  tools kvm headers arm64: Update KVM header from the kernel sources
  tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources
  tools headers UAPI: Sync linux/kvm.h with the kernel sources

1 files changed, 7 insertions, 3 deletions

diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index a839b30c981b..ea9c083ab1e3 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -715,9 +715,13 @@ build_id_cache__add(const char *sbuild_id, const char *name, const char *realnam
 		} else if (nsi && nsinfo__need_setns(nsi)) {
 			if (copyfile_ns(name, filename, nsi))
 				goto out_free;
-		} else if (link(realname, filename) && errno != EEXIST &&
-				copyfile(name, filename))
-			goto out_free;
+		} else if (link(realname, filename) && errno != EEXIST) {
+			struct stat f_stat;
+
+			if (!(stat(name, &f_stat) < 0) &&
+					copyfile_mode(name, filename, f_stat.st_mode))
+				goto out_free;
+		}
 	}
 
 	/* Some binaries are stripped, but have .debug files with their symbol