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(parent: 89eba42) | patch
x86/bugs: Enable STIBP for JMP2RET
authorKim Phillips <kim.phillips@amd.com>
Tue, 14 Jun 2022 21:15:51 +0000 (23:15 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 23 Jul 2022 10:54:02 +0000 (12:54 +0200)
commitb4e05ea71edaf52f2ecef675407a82160176ac54
tree4bdc8369fa1fb03b83ac0e41a2de7ab30be6dab7tree | snapshot
parent89eba42632fcfff30e84f66a5a7ca63882ac64eacommit | diff
x86/bugs: Enable STIBP for JMP2RET

commit e8ec1b6e08a2102d8755ccb06fa26d540f26a2fa upstream.

For untrained return thunks to be fully effective, STIBP must be enabled
or SMT disabled.

Co-developed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Documentation/admin-guide/kernel-parameters.txt diff | blob | history
arch/x86/kernel/cpu/bugs.c diff | blob | history
Domain: System / Kernel;