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diff --git a/sys/arm64/arm64/undefined.c b/sys/arm64/arm64/undefined.c
--- a/sys/arm64/arm64/undefined.c
+++ b/sys/arm64/arm64/undefined.c
@@ -322,8 +322,9 @@
if (el == 0) {
ret = fueword32((uint32_t *)frame->tf_elr, &insn);
+ /* Raise a SIGILL if we are unable to read the instruction */
if (ret != 0)
- panic("Unable to read userspace faulting instruction");
+ return (0);
} else {
insn = *(uint32_t *)frame->tf_elr;
}

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