linux: Make PTRACE_GETREGSET return proper buffer size

This fixes Chrome warning: [1022/152319.328632:ERROR:ptracer.cc(476)] Unexpected registers size 0 != 216, 68 Reviewed By: emaste Sponsored By: EPSRC Differential Revision: https://reviews.freebsd.org/D32616
Snoopy354 · Oct 29, 2021 · f939dcc · f939dcc
1 parent c8c93b1
commit f939dcc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sys/amd64/linux/linux_ptrace.c b/sys/amd64/linux/linux_ptrace.c
@@ -540,7 +540,7 @@ linux_ptrace_getregset_prstatus(struct thread *td, pid_t pid, l_ulong data)
 		return (error);
 	}
 
-	iov.iov_len -= len;
+	iov.iov_len = len;
 	error = copyout(&iov, (void *)data, sizeof(iov));
 	if (error != 0) {
 		linux_msg(td, "iov copyout error %d", error);