[kvmtool PATCH v2 07/10] riscv: Fix no params with nodefault segfault

From: Anup Patel <apatel@ventanamicro.com>
To: Will Deacon <will@kernel.org>,
	julien.thierry.kdev@gmail.com, maz@kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Atish Patra <atishp@atishpatra.org>,
	Andrew Jones <ajones@ventanamicro.com>,
	Anup Patel <anup@brainfault.org>,
	kvm@vger.kernel.org, kvm-riscv@lists.infradead.org,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	Anup Patel <apatel@ventanamicro.com>
Subject: [kvmtool PATCH v2 07/10] riscv: Fix no params with nodefault segfault
Date: Thu, 24 Apr 2025 21:01:56 +0530	[thread overview]
Message-ID: <20250424153159.289441-8-apatel@ventanamicro.com> (raw)
In-Reply-To: <20250424153159.289441-1-apatel@ventanamicro.com>

From: Andrew Jones <ajones@ventanamicro.com>

Fix segfault received when using --nodefault without --params.

Fixes: 7c9aac003925 ("riscv: Generate FDT at runtime for Guest/VM")
Suggested-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20250123151339.185908-2-ajones@ventanamicro.com
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
 riscv/fdt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/riscv/fdt.c b/riscv/fdt.c
index 3ee20a9..251821e 100644
--- a/riscv/fdt.c
+++ b/riscv/fdt.c
@@ -263,9 +263,10 @@ static int setup_fdt(struct kvm *kvm)
 		if (kvm->cfg.kernel_cmdline)
 			_FDT(fdt_property_string(fdt, "bootargs",
 						 kvm->cfg.kernel_cmdline));
-	} else
+	} else if (kvm->cfg.real_cmdline) {
 		_FDT(fdt_property_string(fdt, "bootargs",
 					 kvm->cfg.real_cmdline));
+	}
 
 	_FDT(fdt_property_string(fdt, "stdout-path", "serial0"));
 
-- 
2.43.0


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