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(parent: e148b6d) | patch
x86/speculation: Fill RSB on vmexit for IBRS
authorJosh Poimboeuf <jpoimboe@kernel.org>
Tue, 14 Jun 2022 21:16:15 +0000 (23:16 +0200)
committerBorislav Petkov <bp@suse.de>
Mon, 27 Jun 2022 08:34:00 +0000 (10:34 +0200)
commit99bd3f0c2d4f688625f70bba863fcebcf3f65158
tree2de4396bfa550c400fe8380e435fb28169733cd9tree | snapshot
parente148b6d13173ceec343eba2cab7ac81f920f5a1ecommit | diff
x86/speculation: Fill RSB on vmexit for IBRS

Prevent RSB underflow/poisoning attacks with RSB.  While at it, add a
bunch of comments to attempt to document the current state of tribal
knowledge about RSB attacks and what exactly is being mitigated.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
arch/x86/include/asm/cpufeatures.h diff | blob | history
arch/x86/kernel/cpu/bugs.c diff | blob | history
arch/x86/kvm/vmx/vmenter.S diff | blob | history
Linux Kernel Source Tree.