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diff --git a/tests/sys/kern/ktrace_test.c b/tests/sys/kern/ktrace_test.c
--- a/tests/sys/kern/ktrace_test.c
+++ b/tests/sys/kern/ktrace_test.c
@@ -31,6 +31,7 @@
#include <sys/capsicum.h>
#include <sys/cpuset.h>
#include <sys/ktrace.h>
+#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/sysent.h>
#include <sys/time.h>
@@ -474,6 +475,38 @@
"cpuset_setaffinity");
}
+ATF_TC_WITHOUT_HEAD(ktrace__cap_shm_open);
+ATF_TC_BODY(ktrace__cap_shm_open, tc)
+{
+ struct ktr_cap_fail violation;
+ sigset_t set = { };
+ pid_t pid;
+ int error;
+
+ /* Block SIGUSR1 so child does not terminate. */
+ ATF_REQUIRE(sigaddset(&set, SIGUSR1) != -1);
+ ATF_REQUIRE(sigprocmask(SIG_BLOCK, &set, NULL) != -1);
+
+ ATF_REQUIRE((pid = fork()) != -1);
+ if (pid == 0) {
+ /* Wait until ktrace has started. */
+ CHILD_REQUIRE(sigwait(&set, &error) != -1);
+ CHILD_REQUIRE_EQ(error, SIGUSR1);
+
+ CHILD_REQUIRE(shm_open("/ktrace_shm", O_RDWR | O_CREAT,
+ 0600) != -1);
+ CHILD_REQUIRE(shm_unlink("/ktrace_shm") != -1);
+ exit(0);
+ }
+
+ cap_trace_child(pid, &violation, 1);
+ ATF_REQUIRE_EQ(violation.cap_type, CAPFAIL_NAMEI);
+ error = syscallabi(violation.cap_svflags);
+ ATF_REQUIRE_STREQ(sysdecode_syscallname(error, violation.cap_code),
+ "shm_open2");
+ ATF_REQUIRE_STREQ(violation.cap_data.cap_path, "/ktrace_shm");
+}
+
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, ktrace__cap_not_capable);
@@ -484,5 +517,6 @@
ATF_TP_ADD_TC(tp, ktrace__cap_sockaddr);
ATF_TP_ADD_TC(tp, ktrace__cap_namei);
ATF_TP_ADD_TC(tp, ktrace__cap_cpuset);
+ ATF_TP_ADD_TC(tp, ktrace__cap_shm_open);
return (atf_no_error());
}

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