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+id = 929
+title = "qemu-user syscall clone fails"
+state = "closed"
+created_at = "2022-03-22T20:08:51.061Z"
+closed_at = "2022-03-23T00:25:03.539Z"
+labels = []
+url = "https://gitlab.com/qemu-project/qemu/-/issues/929"
+host-os = "Linux"
+host-arch = "x86_64"
+qemu-version = "6.2.0` and `6.2.90 (v7.0.0-rc0-52-g330724977b)"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """This seems very similar to the issue reported here (https://bugs.launchpad.net/qemu/+bug/1926996). When attempting to perform the clone syscall, an error of -1 is returned where I would expect it to succeed. Running the same executable outside of qemu works as expected."""
+reproduce = """1. gcc clone.c
+2. qemu-x86_64 a.out"""
+additional = """I've tried building with gcc, zig cc, and clang and the output of each works fine when running natively, but running under qemu fails. I originally discovered it when cross compiling to riscv64 but it doesn't seem to be limited to that architecture.
+
+```
+// clone.c
+
+#include <linux/sched.h>
+#include <sched.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <stdio.h>
+
+int main(void) {
+
+  long pid = syscall( SYS_clone, 0, 0, 0, 0, 0 );
+
+  if (pid < 0) {
+    printf( "error %ld\\n", pid );
+  } else if (pid == 0) {
+    printf( "child %ld\\n", pid );
+  } else {
+    printf( "parent %ld\\n", pid );
+  }
+
+  return 0;
+}
+```"""