From: Simon Horman <horms@kernel.org>
To: Pingfan Liu <piliu@redhat.com>
Cc: kexec@lists.infradead.org, Philipp Rudo <prudo@redhat.com>
Subject: Re: [PATCH] UKI: Fix the size of real payload
Date: Fri, 12 Dec 2025 10:13:19 +0000 [thread overview]
Message-ID: <aTvqv6xXfGRS6WC6@horms.kernel.org> (raw)
In-Reply-To: <20251205020536.8358-1-piliu@redhat.com>
On Fri, Dec 05, 2025 at 10:05:36AM +0800, Pingfan Liu wrote:
> According to the PE file specification, each section's SizeOfRawData
> must be a multiple of FileAlignment (usually 512). So when ukify builds
> a UKI image, it pads the kernel image, initrd, etc. with zeros aligned
> to 512 bytes. The actual payload size is recorded in VirtualSize.
>
> Since the checksum includes the trailing zeros, this causes issues when
> loading a signed x86 bzImage, which is stored in the UKI's .linux
> section.
>
> Credit goes to Philipp, who analysed and pointed out this issue to me.
>
> Signed-off-by: Pingfan Liu <piliu@redhat.com>
> Cc: Philipp Rudo <prudo@redhat.com>
> To: Simon Horman <horms@kernel.org>
> To: kexec@lists.infradead.org
Thanks, applied.
- UKI: Fix the size of real payload
https://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git/commit/?id=e18a71faae08
prev parent reply other threads:[~2025-12-12 10:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-05 2:05 [PATCH] UKI: Fix the size of real payload Pingfan Liu
2025-12-12 10:13 ` Simon Horman [this message]
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