[PATCH] fuzz: Disable QEMU's signal handlers

[Alexander Bulekov]

With the fuzzer, we never call main_loop_should_exit, since we manually
call main_loop_wait. This means that the only way to terminate the
fuzzer is with SIGKILL. Disable the signal handlers, so there are
reasonable ways to terminate the fuzzer and use atexit() to clean-up
after the fuzzer.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
---
 tests/qtest/fuzz/fuzz.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c
index d926c490c5..eb0070437f 100644
--- a/tests/qtest/fuzz/fuzz.c
+++ b/tests/qtest/fuzz/fuzz.c
@@ -217,5 +217,13 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char 
***envp)
     /* re-enable the rcu atfork, which was previously disabled in qemu_init */
     rcu_enable_atfork();
 
+    /*
+     * Disable QEMU's signal handlers, since we manually control the main_loop,
+     * and don't check for main_loop_should_exit
+     */
+    signal(SIGINT, SIG_DFL);
+    signal(SIGHUP, SIG_DFL);
+    signal(SIGTERM, SIG_DFL);
+
     return 0;
 }
-- 
2.28.0