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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2022-02-18 11:49:08 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-11 10:15:11 +0100 |
| commit | 995629e1d8e6751936c6e2b738f70b392b0461de (patch) | |
| tree | fb1b077f5b07b3b5051d1d63a1c31a8d3af61006 /include/linux/bpf.h | |
| parent | 7af95ef3ec6248696300fce5c68f6c8c4f50e4a4 (diff) | |
| download | linux-stable-995629e1d8e6751936c6e2b738f70b392b0461de.tar.gz linux-stable-995629e1d8e6751936c6e2b738f70b392b0461de.tar.bz2 linux-stable-995629e1d8e6751936c6e2b738f70b392b0461de.zip | |
x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting
commit 44a3918c8245ab10c6c9719dd12e7a8d291980d8 upstream.
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>
[fllinden@amazon.com: backported to 4.19]
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/bpf.h')
| -rw-r--r-- | include/linux/bpf.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 3b3337333cfd..48e6d68ec5ee 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -533,6 +533,11 @@ static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); int array_map_alloc_check(union bpf_attr *attr); +static inline bool unprivileged_ebpf_enabled(void) +{ + return !sysctl_unprivileged_bpf_disabled; +} + #else /* !CONFIG_BPF_SYSCALL */ static inline struct bpf_prog *bpf_prog_get(u32 ufd) { @@ -644,6 +649,12 @@ static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, { return ERR_PTR(-EOPNOTSUPP); } + +static inline bool unprivileged_ebpf_enabled(void) +{ + return false; +} + #endif /* CONFIG_BPF_SYSCALL */ static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |