Date: Tue, 01 Jun 2021 13:06:40 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-arm@FreeBSD.org Subject: [Bug 256334] [genet] Race condition in Pi4's gen_attach() can cause SIGSEGV. Message-ID: <bug-256334-7@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256334 Bug ID: 256334 Summary: [genet] Race condition in Pi4's gen_attach() can cause SIGSEGV. Product: Base System Version: CURRENT Hardware: arm64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: arm Assignee: freebsd-arm@FreeBSD.org Reporter: ghuckriede@blackberry.com 'genet' driver starts interrupt handlers before ifp is allocated. Version: git main @ d3f7975fcb346ea28dde079a9c04cff5ef20a8d7 gen_intr() uses sc->ifp here: https://cgit.freebsd.org/src/blame/sys/arm64/broadcom/genet/if_genet.c#n1260 gen_attach() calls bus_setup_intr() here: https://cgit.freebsd.org/src/blame/sys/arm64/broadcom/genet/if_genet.c#n283 https://cgit.freebsd.org/src/blame/sys/arm64/broadcom/genet/if_genet.c#n290 gen_attach() calls if_alloc() here: https://cgit.freebsd.org/src/blame/sys/arm64/broadcom/genet/if_genet.c#n298 Possible fixes: gen_attach() could either hold GEN_LOCK() or complete the init before the bus_setup_intr() calls. --=20 You are receiving this mail because: You are the assignee for the bug.=
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