Re: [PATCH v4] riscv: Prevent NULL pointer dereference in machine_kexec_prepare

[email protected] Tue, 07 Jul 2026 02:41:03 +0000

Newsgroups	org.kernel.vger.linux-integrity,org.infradead.lists.kexec,org.infradead.lists.linux-riscv,org.kernel.vger.kernel-janitors,org.kernel.vger.linux-kernel,org.kernel.vger.stable
Message-ID	<178339206389.1302215.10769604011679543705.git-patchwork-notify@kernel.org>

Hello:

This patch was applied to riscv/linux.git (fixes)
by Paul Walmsley <[email protected]>:

On Fri,  3 Jul 2026 23:15:31 +1200 you wrote:
> A NULL pointer dereference issue is noticed in riscv's machine_kexec_prepare(),
> where image->segment[i].buf might be NULL and copied unchecked.
> 
> The NULL buf comes from ima_add_kexec_buffer(), where kbuf is added by
> kexec_add_buffer(), but kbuf.buffer is NULL, then it is copied without
> a check in machine_kexec_prepare().
> 
> [...]

Here is the summary with links:
  - [v4] riscv: Prevent NULL pointer dereference in machine_kexec_prepare
    https://git.kernel.org/riscv/c/60d607dc599a

You are awesome, thank you!
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