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x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting
authorJosh Poimboeuf <jpoimboe@redhat.com>
Fri, 18 Feb 2022 19:49:08 +0000 (11:49 -0800)
committerBorislav Petkov <bp@suse.de>
Mon, 21 Feb 2022 09:21:47 +0000 (10:21 +0100)
commit57e4ff4f9c43a4653cf7a8be983d1692fd1278b7
tree1dacbf59f0672a0cfeea601cf1b338d9ed74bc80tree | snapshot
parent2cb747819e3ef22f2cde35c37ee67e54c678280bcommit | diff
x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting

With unprivileged eBPF enabled, eIBRS (without retpoline) is vulnerable
to Spectre v2 BHB-based attacks.

When both are enabled, print a warning message and report it in the
'spectre_v2' sysfs vulnerabilities file.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
arch/x86/kernel/cpu/bugs.c diff | blob | history
include/linux/bpf.h diff | blob | history
kernel/sysctl.c diff | blob | history
Linux Kernel Source Tree.