From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- security/ipe/policy.h | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 security/ipe/policy.h (limited to 'security/ipe/policy.h') diff --git a/security/ipe/policy.h b/security/ipe/policy.h new file mode 100644 index 000000000..5bfbdbdde --- /dev/null +++ b/security/ipe/policy.h @@ -0,0 +1,98 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2024 Microsoft Corporation. All rights reserved. + */ +#ifndef _IPE_POLICY_H +#define _IPE_POLICY_H + +#include +#include +#include + +enum ipe_op_type { + IPE_OP_EXEC = 0, + IPE_OP_FIRMWARE, + IPE_OP_KERNEL_MODULE, + IPE_OP_KEXEC_IMAGE, + IPE_OP_KEXEC_INITRAMFS, + IPE_OP_POLICY, + IPE_OP_X509, + __IPE_OP_MAX, +}; + +#define IPE_OP_INVALID __IPE_OP_MAX + +enum ipe_action_type { + IPE_ACTION_ALLOW = 0, + IPE_ACTION_DENY, + __IPE_ACTION_MAX +}; + +#define IPE_ACTION_INVALID __IPE_ACTION_MAX + +enum ipe_prop_type { + IPE_PROP_BOOT_VERIFIED_FALSE, + IPE_PROP_BOOT_VERIFIED_TRUE, + IPE_PROP_DMV_ROOTHASH, + IPE_PROP_DMV_SIG_FALSE, + IPE_PROP_DMV_SIG_TRUE, + IPE_PROP_FSV_DIGEST, + IPE_PROP_FSV_SIG_FALSE, + IPE_PROP_FSV_SIG_TRUE, + __IPE_PROP_MAX +}; + +#define IPE_PROP_INVALID __IPE_PROP_MAX + +struct ipe_prop { + struct list_head next; + enum ipe_prop_type type; + void *value; +}; + +struct ipe_rule { + enum ipe_op_type op; + enum ipe_action_type action; + struct list_head props; + struct list_head next; +}; + +struct ipe_op_table { + struct list_head rules; + enum ipe_action_type default_action; +}; + +struct ipe_parsed_policy { + const char *name; + struct { + u16 major; + u16 minor; + u16 rev; + } version; + + enum ipe_action_type global_default_action; + + struct ipe_op_table rules[__IPE_OP_MAX]; +}; + +struct ipe_policy { + const char *pkcs7; + size_t pkcs7len; + + const char *text; + size_t textlen; + + struct ipe_parsed_policy *parsed; + + struct dentry *policyfs; +}; + +struct ipe_policy *ipe_new_policy(const char *text, size_t textlen, + const char *pkcs7, size_t pkcs7len); +void ipe_free_policy(struct ipe_policy *pol); +int ipe_update_policy(struct inode *root, const char *text, size_t textlen, + const char *pkcs7, size_t pkcs7len); +int ipe_set_active_pol(const struct ipe_policy *p); +extern struct mutex ipe_policy_lock; + +#endif /* _IPE_POLICY_H */ -- cgit v1.3.1