um: userspace - be more verbose in ptrace set regs error (22e19c8d) · Commits · 戴 / test

When ptrace fails to set GP/FP regs for the target process, log the error before crashing the UML kernel. Signed-off-by:

arch/um/os-Linux/skas/process.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -323,11 +323,17 @@ void userspace(struct uml_pt_regs *regs)
		* fail. In this case, there is nothing to do but
		* just kill the process.
		*/
		if (ptrace(PTRACE_SETREGS, pid, 0, regs->gp))
		if (ptrace(PTRACE_SETREGS, pid, 0, regs->gp)) {
		printk(UM_KERN_ERR "userspace - ptrace set regs "
		"failed, errno = %d\n", errno);
		fatal_sigsegv();
		}

		if (put_fp_registers(pid, regs->fp))
		if (put_fp_registers(pid, regs->fp)) {
		printk(UM_KERN_ERR "userspace - ptrace set fp regs "
		"failed, errno = %d\n", errno);
		fatal_sigsegv();
		}

		/* Now we set local_using_sysemu to be used for one loop */
		local_using_sysemu = get_using_sysemu();