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(parent: 404a7a2) | patch
ARM: include unprivileged BPF status in Spectre V2 reporting
authorRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Mon, 7 Mar 2022 19:28:32 +0000 (19:28 +0000)
committerRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tue, 8 Mar 2022 14:46:08 +0000 (14:46 +0000)
commitee86635e0d8b966f5db3b3a6b73704d8cf9beb7b
tree85333d5e2e4f143773dc9e455c156a8ad73c3afatree | snapshot
parent404a7a266c1acb6a75b182d904f0d6bfe879f665commit | diff
ARM: include unprivileged BPF status in Spectre V2 reporting

The mitigations for Spectre-BHB are only applied when an exception
is taken, but when unprivileged BPF is enabled, userspace can
load BPF programs that can be used to exploit the problem.

When unprivileged BPF is enabled, report the vulnerable status via
the spectre_v2 sysfs file.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
arch/arm/kernel/spectre.c diff | blob | history
Linux Kernel Source Tree.