/openbmc/linux/scripts/ |
H A D | Makefile.vmlinux_o | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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/openbmc/linux/tools/objtool/include/objtool/ |
H A D | builtin.h | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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H A D | check.h | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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/openbmc/linux/arch/x86/include/asm/ |
H A D | unwind_hints.h | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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H A D | nospec-branch.h | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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/openbmc/linux/include/linux/ |
H A D | objtool.h | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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/openbmc/linux/arch/x86/xen/ |
H A D | xen-asm.S | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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/openbmc/linux/tools/objtool/ |
H A D | builtin-check.c | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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H A D | check.c | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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/openbmc/linux/arch/x86/entry/ |
H A D | entry_64_compat.S | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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H A D | entry_64.S | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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/openbmc/linux/arch/x86/kernel/ |
H A D | head_64.S | a09a6e23 Tue Jun 14 16:16:03 CDT 2022 Peter Zijlstra <peterz@infradead.org> objtool: Add entry UNRET validation
Since entry asm is tricky, add a validation pass that ensures the retbleed mitigation has been done before the first actual RET instruction.
Entry points are those that either have UNWIND_HINT_ENTRY, which acts as UNWIND_HINT_EMPTY but marks the instruction as an entry point, or those that have UWIND_HINT_IRET_REGS at +0.
This is basically a variant of validate_branch() that is intra-function and it will simply follow all branches from marked entry points and ensures that all paths lead to ANNOTATE_UNRET_END.
If a path hits RET or an indirection the path is a fail and will be reported.
There are 3 ANNOTATE_UNRET_END instances:
- UNTRAIN_RET itself - exception from-kernel; this path doesn't need UNTRAIN_RET - all early exceptions; these also don't need UNTRAIN_RET
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
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