After updating crosvm to build with sanitizers (https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/1407826), I found the following issues in crosvm unit test:

1. odr violations reported:

crosvm-0.0.1-r279:  * ASAN error detected:
crosvm-0.0.1-r279:  * =================================================================
crosvm-0.0.1-r279:  * ==31271==ERROR: AddressSanitizer: odr-violation (0x7f926ab11420):
crosvm-0.0.1-r279:  *   [1] size=0 'anon.d59a89eaff93c774f0a2f89c9224e2ce.7' 33c5u6qtoh4rvyby
crosvm-0.0.1-r279:  *   [2] size=0 '' 1dq20niodil9pohi
crosvm-0.0.1-r279:  * These globals were registered at these points:
crosvm-0.0.1-r279:  *   [1]:
crosvm-0.0.1-r279:  *     #0 0x7f92690d932e in __asan_register_globals /var/tmp/portage/dev-lang/rust-1.31.0/work/rustc-1.31.0-src/src/libcompiler_builtins/compiler-rt/lib/asan/asan_globals.cc:359:3
crosvm-0.0.1-r279:  *     #1 0x7f92690da22b in __asan_register_elf_globals /var/tmp/portage/dev-lang/rust-1.31.0/work/rustc-1.31.0-src/src/libcompiler_builtins/compiler-rt/lib/asan/asan_globals.cc:342:3
crosvm-0.0.1-r279:  *     #2 0x7f92688e5a1c in __libc_start_main (/lib64/libc.so.6+0x21a1c)
crosvm-0.0.1-r279:  * 
crosvm-0.0.1-r279:  *   [2]:
crosvm-0.0.1-r279:  *     #0 0x7f92690d932e in __asan_register_globals /var/tmp/portage/dev-lang/rust-1.31.0/work/rustc-1.31.0-src/src/libcompiler_builtins/compiler-rt/lib/asan/asan_globals.cc:359:3
crosvm-0.0.1-r279:  *     #1 0x7f92690da22b in __asan_register_elf_globals /var/tmp/portage/dev-lang/rust-1.31.0/work/rustc-1.31.0-src/src/libcompiler_builtins/compiler-rt/lib/asan/asan_globals.cc:342:3
crosvm-0.0.1-r279:  *     #2 0x7f92688e5a1c in __libc_start_main (/lib64/libc.so.6+0x21a1c)
crosvm-0.0.1-r279:  * 
crosvm-0.0.1-r279:  * ==31271==HINT: if you don't care about these errors you may set ASAN_OPTIONS=detect_odr_violation=0
crosvm-0.0.1-r279:  * SUMMARY: AddressSanitizer: odr-violation: global 'anon.d59a89eaff93c774f0a2f89c9224e2ce.7' at 33c5u6qtoh4rvyby


2. I tried to disable the odr errors by setting it to false

--- a/chromeos-base/crosvm/crosvm-9999.ebuild
+++ b/chromeos-base/crosvm/crosvm-9999.ebuild
@@ -56,6 +56,8 @@ RDEPEND="
 "
 DEPEND="${RDEPEND}"
 
+ASAN_OPTIONS=detect_odr_violation=0
+
 src_unpack() {


But this found another problem.

 * ASAN error detected:
 * ==236317==WARNING: LeakSanitizer is disabled in forked process.