Similarly, the clang 17 ASAN reports the 'test-free' test:
=================================================================
==2069723==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x7f8a90324000 at pc 0x55c1bfe66a3a bp 0x7ffdd392c9d0 sp 0x7ffdd392c190
READ of size 4096 at 0x7f8a90324000 thread T0
#0 0x55c1bfe66a39 in __asan_memcpy
/home/runner/work/llvm-project/llvm-project/final/llvm-project/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp:63:3
#1 0x55c1bfea6e6b in main
/media/develdata/devel/GNULIB/testdir-all/build-64-clang/gltests/../../gltests/test-free.c:141:11
#2 0x7f8a97bfcd8f in __libc_start_call_main
csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#3 0x7f8a97bfce3f in __libc_start_main csu/../csu/libc-start.c:392:3
#4 0x55c1bfdcb304 in _start
(/media/develdata/devel/GNULIB/testdir-all/build-64-clang/gltests/test-free+0x2c304)
0x7f8a90324000 is located 2048 bytes before 16776960-byte region
[0x7f8a90324800,0x7f8a91324700)
allocated by thread T0 here:
#0 0x55c1bfe6897e in malloc
/home/runner/work/llvm-project/llvm-project/final/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:69:3
#1 0x55c1bfea6d62 in main
/media/develdata/devel/GNULIB/testdir-all/build-64-clang/gltests/../../gltests/test-free.c:135:33
#2 0x7f8a97bfcd8f in __libc_start_call_main
csu/../sysdeps/nptl/libc_start_call_main.h:58:16
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/runner/work/llvm-project/llvm-project/final/llvm-project/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp:63:3
in __asan_memcpy
Shadow bytes around the buggy address:
0x7f8a90323d80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90323e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90323e80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90323f00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90323f80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x7f8a90324000:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90324080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90324100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90324180: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90324200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x7f8a90324280: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==2069723==ABORTING
FAIL test-free (exit status: 134)
The cause: this test assumes glibc malloc(), not some ASAN wrappers.
2024-05-09 Bruno Haible <br...@clisp.org>
free tests: Avoid test failure with ASAN.
* tests/test-free.c (main): Skip mmap/munmap based test if ASAN is
enabled.
diff --git a/tests/test-free.c b/tests/test-free.c
index 703c550e0d..9cc0c7016c 100644
--- a/tests/test-free.c
+++ b/tests/test-free.c
@@ -98,6 +98,12 @@ main ()
#undef N
}
+ /* Skip this test when an address sanitizer is in use, because it would
report
+ a "heap buffer overflow". */
+ #ifndef __has_feature
+ #define __has_feature(a) 0
+ #endif
+ #if !(defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer))
/* Test a less common code path.
When malloc() is based on mmap(), free() can sometimes call munmap().
munmap() usually succeeds, but fails in a particular situation: when
@@ -170,6 +176,7 @@ main ()
}
}
#endif
+ #endif
return 0;
}
