From: Pratyush Yadav <pratyush@kernel.org>
To: Tao Liu <ltao@redhat.com>
Cc: pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu,
alex@ghiti.fr, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org, kexec@lists.infradead.org,
bhe@redhat.com
Subject: Re: [PATCH v2] riscv: Fix a NULL pointer reference in machine_kexec_prepare
Date: Mon, 29 Jun 2026 13:13:24 +0200 [thread overview]
Message-ID: <2vxzcxx9k3aj.fsf@kernel.org> (raw)
In-Reply-To: <20260627222602.23594-2-ltao@redhat.com> (Tao Liu's message of "Sun, 28 Jun 2026 10:26:03 +1200")
On Sun, Jun 28 2026, Tao Liu wrote:
> A NULL pointer reference 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 security/integrity/ima/ima_kexec.c:
> ima_add_kexec_buffer(), where kbuf is added by kexec_add_buffer(),
> but kbuf.buffer is NULL.
>
> Fix this by simply adding a check before copy.
>
> Acked-by: Baoquan He <bhe@redhat.com>
> Signed-off-by: Tao Liu <ltao@redhat.com>
Acked-by: Pratyush Yadav <pratyush@kernel.org>
[...]
--
Regards,
Pratyush Yadav
prev parent reply other threads:[~2026-06-29 11:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-27 22:26 [PATCH v2] riscv: Fix a NULL pointer reference in machine_kexec_prepare Tao Liu
2026-06-29 11:13 ` Pratyush Yadav [this message]
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