Merge tag 'x86_bugs_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 hw mitigation updates from Borislav Petkov:

 - A bunch of improvements, cleanups and fixlets to the SRSO mitigation
   machinery and other, general cleanups to the hw mitigations code, by
   Josh Poimboeuf

 - Improve the return thunk detection by objtool as it is absolutely
   important that the default return thunk is not used after returns
   have been patched. Future work to detect and report this better is
   pending

 - Other misc cleanups and fixes

* tag 'x86_bugs_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
  x86/retpoline: Document some thunk handling aspects
  x86/retpoline: Make sure there are no unconverted return thunks due to KCSAN
  x86/callthunks: Delete unused "struct thunk_desc"
  x86/vdso: Run objtool on vdso32-setup.o
  objtool: Fix return thunk patching in retpolines
  x86/srso: Remove unnecessary semicolon
  x86/pti: Fix kernel warnings for pti= and nopti cmdline options
  x86/calldepth: Rename __x86_return_skl() to call_depth_return_thunk()
  x86/nospec: Refactor UNTRAIN_RET[_*]
  x86/rethunk: Use SYM_CODE_START[_LOCAL]_NOALIGN macros
  x86/srso: Disentangle rethunk-dependent options
  x86/srso: Move retbleed IBPB check into existing 'has_microcode' code block
  x86/bugs: Remove default case for fully switched enums
  x86/srso: Remove 'pred_cmd' label
  x86/srso: Unexport untraining functions
  x86/srso: Improve i-cache locality for alias mitigation
  x86/srso: Fix unret validation dependencies
  x86/srso: Fix vulnerability reporting for missing microcode
  x86/srso: Print mitigation for retbleed IBPB case
  x86/srso: Print actual mitigation if requested mitigation isn't possible
  ...

1 files changed, 16 insertions, 0 deletions

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index e308d1ba664e..e94756e09ca9 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1611,6 +1611,22 @@ static int add_jump_destinations(struct objtool_file *file)
 		}
 
 		/*
+		 * An intra-TU jump in retpoline.o might not have a relocation
+		 * for its jump dest, in which case the above
+		 * add_{retpoline,return}_call() didn't happen.
+		 */
+		if (jump_dest->sym && jump_dest->offset == jump_dest->sym->offset) {
+			if (jump_dest->sym->retpoline_thunk) {
+				add_retpoline_call(file, insn);
+				continue;
+			}
+			if (jump_dest->sym->return_thunk) {
+				add_return_call(file, insn, true);
+				continue;
+			}
+		}
+
+		/*
 		 * Cross-function jump.
 		 */
 		if (insn_func(insn) && insn_func(jump_dest) &&