Date: Thu, 16 Apr 2026 15:04:22 +0000 From: Colin Percival <cperciva@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 62a81003536e - stable/15 - clapic_handle_intr: KASSERT isrc != NULL Message-ID: <69e0fa76.1cb50.16a4b6d0@gitrepo.freebsd.org>
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The branch stable/15 has been updated by cperciva: URL: https://cgit.FreeBSD.org/src/commit/?id=62a81003536ee6f06707b460e79cae348a7a71d2 commit 62a81003536ee6f06707b460e79cae348a7a71d2 Author: Colin Percival <cperciva@FreeBSD.org> AuthorDate: 2026-03-14 01:03:44 +0000 Commit: Colin Percival <cperciva@FreeBSD.org> CommitDate: 2026-04-16 15:03:58 +0000 clapic_handle_intr: KASSERT isrc != NULL If an interrupt arrives at a CPU which isn't expecting that particular vector, intr_lookup_source will return an isrc of NULL and we'll panic when intr_execute_handlers increments *isrc->is_count. Place a KASSERT a few nanoseconds earlier in order to leave some more breadcrumbs for the next person to trip over this behaviour. Tested on: EC2 r8i.96xlarge MFC after: 3 weeks Sponsored by: Amazon Differential Revision: https://reviews.freebsd.org/D55851 (cherry picked from commit f350063a251c9da0c5ce437eb4c44a2d716b673e) --- sys/x86/x86/local_apic.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/x86/x86/local_apic.c b/sys/x86/x86/local_apic.c index 54026f83dc15..ed9f985dafd5 100644 --- a/sys/x86/x86/local_apic.c +++ b/sys/x86/x86/local_apic.c @@ -1426,6 +1426,9 @@ lapic_handle_intr(int vector, struct trapframe *frame) isrc = intr_lookup_source(apic_idt_to_irq(PCPU_GET(apic_id), vector)); + KASSERT(isrc != NULL, + ("lapic_handle_intr: vector %d unrecognized at lapic %u", + vector, PCPU_GET(apic_id))); intr_execute_handlers(isrc, frame); }home | help
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