ltp: Disable sigwaitinfo tests relying on undefined behavior

Musl finds these issues, which were undetected thus far.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 70 insertions, 0 deletions

diff --git a/meta/recipes-extended/ltp/ltp/0001-sigwaitinfo-Do-not-run-invalid-undefined-test-cases.patch b/meta/recipes-extended/ltp/ltp/0001-sigwaitinfo-Do-not-run-invalid-undefined-test-cases.patch
new file mode 100644
index 0000000000..17d5af89e2
--- /dev/null
+++ b/meta/recipes-extended/ltp/ltp/0001-sigwaitinfo-Do-not-run-invalid-undefined-test-cases.patch
@@ -0,0 +1,69 @@
+From e0a63deb1857eb90288e90d6368df70cdd0c0ec9 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Thu, 28 May 2020 13:04:33 -0700
+Subject: [PATCH] sigwaitinfo: Do not run invalid/undefined test cases
+
+These testcases run for eternity on musl
+
+test_bad_address* cases are passing invalid pointers to a function; that's always UB
+empty_set and timeout rely on the implementation-defined "may fail" for EINTR in sigtimedwait [1]
+
+normally "may fail" is an "unspecified" but here the impl
+is supposed to document it so it's "impl-defined"
+
+[1] https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigtimedwait.html
+
+Upstream-Status: Submitted [https://patchwork.ozlabs.org/project/ltp/patch/20200528204556.2444156-1-raj.khem@gmail.com/]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Cc: Rich Felker <dalias@aerifal.cx>
+---
+ .../kernel/syscalls/sigwaitinfo/sigwaitinfo01.c      | 12 ++----------
+ 1 file changed, 2 insertions(+), 10 deletions(-)
+
+--- a/testcases/kernel/syscalls/sigwaitinfo/sigwaitinfo01.c
++++ b/testcases/kernel/syscalls/sigwaitinfo/sigwaitinfo01.c
+@@ -422,15 +422,10 @@ struct test_desc {
+ } tests[] = {
+ #ifdef TEST_RT_SIGTIMEDWAIT
+ 	{
+-	test_empty_set, my_rt_sigtimedwait, SIGUSR1}, {
+ 	test_unmasked_matching, my_rt_sigtimedwait, SIGUSR1}, {
+ 	test_masked_matching, my_rt_sigtimedwait, SIGUSR1}, {
+ 	test_unmasked_matching_noinfo, my_rt_sigtimedwait, SIGUSR1}, {
+-	test_masked_matching_noinfo, my_rt_sigtimedwait, SIGUSR1}, {
+-	test_bad_address, my_rt_sigtimedwait, SIGUSR1}, {
+-	test_bad_address2, my_rt_sigtimedwait, SIGUSR1}, {
+-	test_bad_address3, my_rt_sigtimedwait, SIGUSR1}, {
+-	test_timeout, my_rt_sigtimedwait, 0},
++	test_masked_matching_noinfo, my_rt_sigtimedwait, SIGUSR1}, 
+ 	    /* Special cases */
+ 	    /* 1: sigwaitinfo does respond to ignored signal */
+ 	{
+@@ -452,25 +447,17 @@ struct test_desc {
+ #endif
+ #if defined TEST_SIGWAITINFO
+ 	{
+-	test_empty_set, my_sigwaitinfo, SIGUSR1}, {
+ 	test_unmasked_matching, my_sigwaitinfo, SIGUSR1}, {
+ 	test_masked_matching, my_sigwaitinfo, SIGUSR1}, {
+ 	test_unmasked_matching_noinfo, my_sigwaitinfo, SIGUSR1}, {
+-	test_masked_matching_noinfo, my_sigwaitinfo, SIGUSR1}, {
+-	test_bad_address, my_sigwaitinfo, SIGUSR1}, {
+-	test_bad_address2, my_sigwaitinfo, SIGUSR1},
++	test_masked_matching_noinfo, my_sigwaitinfo, SIGUSR1},
+ #endif
+ #if defined TEST_SIGTIMEDWAIT
+ 	{
+-	test_empty_set, my_sigtimedwait, SIGUSR1}, {
+ 	test_unmasked_matching, my_sigtimedwait, SIGUSR1}, {
+ 	test_masked_matching, my_sigtimedwait, SIGUSR1}, {
+ 	test_unmasked_matching_noinfo, my_sigtimedwait, SIGUSR1}, {
+-	test_masked_matching_noinfo, my_sigtimedwait, SIGUSR1}, {
+-	test_bad_address, my_sigtimedwait, SIGUSR1}, {
+-	test_bad_address2, my_sigtimedwait, SIGUSR1}, {
+-	test_bad_address3, my_sigtimedwait, SIGUSR1}, {
+-	test_timeout, my_sigtimedwait, 0},
++	test_masked_matching_noinfo, my_sigtimedwait, SIGUSR1},
+ #endif
+ };
+ 
diff --git a/meta/recipes-extended/ltp/ltp_20200515.bb b/meta/recipes-extended/ltp/ltp_20200515.bb
index 67c7590320..f2510baa68 100644
--- a/meta/recipes-extended/ltp/ltp_20200515.bb
+++ b/meta/recipes-extended/ltp/ltp_20200515.bb
@@ -35,6 +35,7 @@ SRC_URI = "git://github.com/linux-test-project/ltp.git \
            file://0007-Fix-test_proc_kill-hanging.patch \
            file://0001-Add-more-musl-exclusions.patch \
            file://0001-ptrace01-Fix-missing-format-string.patch \
+           file://0001-sigwaitinfo-Do-not-run-invalid-undefined-test-cases.patch \
            "
 
 S = "${WORKDIR}/git"