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Index: head/sys/amd64/amd64/ptrace_machdep.c
===================================================================
--- head/sys/amd64/amd64/ptrace_machdep.c
+++ head/sys/amd64/amd64/ptrace_machdep.c
@@ -88,7 +88,8 @@
break;
case PT_SETXSTATE:
- if (data > cpu_max_ext_state_size) {
+ if (data < sizeof(struct savefpu) ||
+ data > cpu_max_ext_state_size) {
error = EINVAL;
break;
}
Index: head/sys/i386/i386/ptrace_machdep.c
===================================================================
--- head/sys/i386/i386/ptrace_machdep.c
+++ head/sys/i386/i386/ptrace_machdep.c
@@ -92,7 +92,8 @@
break;
case PT_SETXSTATE:
- if (data > cpu_max_ext_state_size) {
+ if (data < sizeof(union savefpu) ||
+ data > cpu_max_ext_state_size) {
error = EINVAL;
break;
}

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