Re: [PATCH v4] RISC-V: KVM: Fix null pointer dereference in kvm_riscv_aia_imsic_has_attr()

[patchwork-bot+linux-riscv]

Hello:

This patch was applied to riscv/linux.git (fixes)
by Anup Patel <anup@xxxxxxxxxxxxxx>:

On Sun, 25 Jan 2026 14:33:44 +0000 you wrote:
> Add a null pointer check for imsic_state before dereferencing it in
> kvm_riscv_aia_imsic_has_attr(). While the function checks that the
> vcpu exists, it doesn't verify that the vcpu's imsic_state has been
> initialized, leading to a null pointer dereference when accessed.
> 
> This issue was discovered during fuzzing of RISC-V KVM code. The
> crash occurs when userspace calls KVM_HAS_DEVICE_ATTR ioctl on an
> AIA IMSIC device before the IMSIC state has been fully initialized
> for a vcpu.
> 
> [...]

Here is the summary with links:
  - [v4] RISC-V: KVM: Fix null pointer dereference in kvm_riscv_aia_imsic_has_attr()
    https://git.kernel.org/riscv/c/11366ead4f14

You are awesome, thank you!
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