From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Sat, 25 Apr 2020 05:06:13 -0500
Subject: x86/unwind/orc: Fix error path for bad ORC entry type
Git-commit: a0f81bf26888048100bf017fadf438a5bdffa8d8
Patch-mainline: v5.7-rc5
References: bsc#1058115

If the ORC entry type is unknown, nothing else can be done other than
reporting an error.  Exit the function instead of breaking out of the
switch statement.

Fixes: ee9f8fce9964 ("x86/unwind: Add the ORC unwinder")
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Jones <dsj@fb.com>
Cc: Jann Horn <jannh@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: https://lore.kernel.org/r/a7fa668ca6eabbe81ab18b2424f15adbbfdc810a.1587808742.git.jpoimboe@redhat.com
[ mb: s/goto err/goto done/ on upstream backport ]
Acked-by: Miroslav Benes <mbenes@suse.cz>
---
 arch/x86/kernel/unwind_orc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/unwind_orc.c
+++ b/arch/x86/kernel/unwind_orc.c
@@ -509,7 +509,7 @@ bool unwind_next_frame(struct unwind_sta
 	default:
 		orc_warn("unknown .orc_unwind entry type %d at %pB\n",
 			 orc->type, (void *)orig_ip);
-		break;
+		goto done;
 	}
 
 	/* Find BP: */