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

[patchwork-bot+linux-riscv]

Hello:

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

On Tue, 27 Jan 2026 07:22:19 +0000 you wrote:
> Add a null pointer check for imsic_state before dereferencing it in
> kvm_riscv_aia_imsic_rw_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.
> 
> The crash manifests as:
>   Unable to handle kernel paging request at virtual address
>   dfffffff00000006
>   ...
>   kvm_riscv_aia_imsic_rw_attr+0x2d8/0x854 arch/riscv/kvm/aia_imsic.c:958
>   aia_set_attr+0x2ee/0x1726 arch/riscv/kvm/aia_device.c:354
>   kvm_device_ioctl_attr virt/kvm/kvm_main.c:4744 [inline]
>   kvm_device_ioctl+0x296/0x374 virt/kvm/kvm_main.c:4761
>   vfs_ioctl fs/ioctl.c:51 [inline]
>   ...
> 
> [...]

Here is the summary with links:
  - RISC-V: KVM: Fix null pointer dereference in kvm_riscv_aia_imsic_rw_attr()
    https://git.kernel.org/riscv/c/aeb1d17d1af5

You are awesome, thank you!
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