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| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2024-04-10 22:40:48 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-04-11 10:30:33 +0200 |
| commit | 5f882f3b0a8bf0788d5a0ee44b1191de5319bb8a (patch) | |
| tree | e81864ff7a59b1a389fd57280ddbcc0ddf2f3c84 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | 1cea8a280dfd1016148a3820676f2f03e3f5b898 (diff) | |
| download | linux-5f882f3b0a8bf0788d5a0ee44b1191de5319bb8a.tar.gz linux-5f882f3b0a8bf0788d5a0ee44b1191de5319bb8a.tar.bz2 linux-5f882f3b0a8bf0788d5a0ee44b1191de5319bb8a.zip | |
x86/bugs: Clarify that syscall hardening isn't a BHI mitigation
While syscall hardening helps prevent some BHI attacks, there's still
other low-hanging fruit remaining. Don't classify it as a mitigation
and make it clear that the system may still be vulnerable if it doesn't
have a HW or SW mitigation enabled.
Fixes: ec9404e40e8f ("x86/bhi: Add BHI mitigation knob")
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/b5951dae3fdee7f1520d5136a27be3bdfe95f88b.1712813475.git.jpoimboe@kernel.org
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index a029ad6c4963..a3874cc97892 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6065,8 +6065,7 @@ See Documentation/admin-guide/laptops/sonypi.rst spectre_bhi= [X86] Control mitigation of Branch History Injection - (BHI) vulnerability. Syscalls are hardened against BHI - reglardless of this setting. This setting affects the + (BHI) vulnerability. This setting affects the deployment of the HW BHI control and the SW BHB clearing sequence. |