From: Paul Menzel <pmenzel@molgen.mpg.de>
To: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
Sandipan Das <sandipan@linux.ibm.com>
Cc: it+linux-bpf@molgen.mpg.de, netdev@vger.kernel.org,
bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: sysctl: setting key "net.core.bpf_jit_enable": Invalid argument
Date: Sun, 11 Apr 2021 13:09:07 +0200 [thread overview]
Message-ID: <412d88b2-fa9a-149e-6f6e-3cfbce9edef0@molgen.mpg.de> (raw)
Dear Linux folks,
Related to * [CVE-2021-29154] Linux kernel incorrect computation of
branch displacements in BPF JIT compiler can be abused to execute
arbitrary code in Kernel mode* [1], on the POWER8 system IBM S822LC with
self-built Linux 5.12.0-rc5+, I am unable to disable `bpf_jit_enable`.
$ /sbin/sysctl net.core.bpf_jit_enable
net.core.bpf_jit_enable = 1
$ sudo /sbin/sysctl -w net.core.bpf_jit_enable=0
sysctl: setting key "net.core.bpf_jit_enable": Invalid argument
It works on an x86 with Debian sid/unstable and Linux 5.10.26-1.
Kind regards,
Paul
[1]: https://seclists.org/oss-sec/2021/q2/12
next reply other threads:[~2021-04-11 11:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-11 11:09 Paul Menzel [this message]
2021-04-11 16:23 ` sysctl: setting key "net.core.bpf_jit_enable": Invalid argument Christophe Leroy
2021-04-11 18:39 ` Paul Menzel
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