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-rw-r--r--arch/x86/kernel/hw_breakpoint.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 6694c0f8e6c1..012ed82e5bd3 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -269,6 +269,20 @@ static inline bool within_cpu_entry(unsigned long addr, unsigned long end)
CPU_ENTRY_AREA_TOTAL_SIZE))
return true;
+ /*
+ * When FSGSBASE is enabled, paranoid_entry() fetches the per-CPU
+ * GSBASE value via __per_cpu_offset or pcpu_unit_offsets.
+ */
+#ifdef CONFIG_SMP
+ if (within_area(addr, end, (unsigned long)__per_cpu_offset,
+ sizeof(unsigned long) * nr_cpu_ids))
+ return true;
+#else
+ if (within_area(addr, end, (unsigned long)&pcpu_unit_offsets,
+ sizeof(pcpu_unit_offsets)))
+ return true;
+#endif
+
for_each_possible_cpu(cpu) {
/* The original rw GDT is being used after load_direct_gdt() */
if (within_area(addr, end, (unsigned long)get_cpu_gdt_rw(cpu),