x86: fix assertion in ipi_send_cpu to range check the passed id
Prior to the change for sufficiently bad id (and in particular NOCPU which is -1) it would access memory outside of the cpu_apic_ids array.
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=356897
@ -1233,7 +1233,8 @@ ipi_send_cpu(int cpu, u_int ipi)
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u_int bitmap, old, new;
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u_int *cpu_bitmap;
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KASSERT(cpu_apic_ids[cpu] != -1, ("IPI to non-existent CPU %d", cpu));
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KASSERT((u_int)cpu < MAXCPU && cpu_apic_ids[cpu] != -1,
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("IPI to non-existent CPU %d", cpu));
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if (IPI_IS_BITMAPED(ipi)) {
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bitmap = 1 << ipi;
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