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From: BTD Master <btdmaster@disroot.org>
To: bpf@vger.kernel.org
Subject: kernel: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
Date: Tue, 18 Jun 2024 18:43:18 +0100	[thread overview]
Message-ID: <20240618184318.01aaaf4f@disroot.org> (raw)

Hi,

I would like to report the call to memfd_create in `src/libbpf.c` does
not specify MFD_NOEXEC_SEAL on newer kernels that allow
this feature, which is used to prevent code execution on the memory
area. It only specifies MFD_CLOEXEC.

This is reflected in the kernel logs:
[    4.853311] systemd[1]: memfd_create() called without MFD_EXEC or
MFD_NOEXEC_SEAL set

There is a similar patch in wayland for checking and versioning this
flag: https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/343/

Thanks!
btdmaster

                 reply	other threads:[~2024-06-18 17:43 UTC|newest]

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