6.8-stable patches

added patches:
	x86-retpoline-add-noendbr-annotation-to-the-srso-dummy-return-thunk.patch

diff --git a/queue-6.8/series b/queue-6.8/series
index c91ecc722c05b00a0fabdda4ac4a45b3a7720e79..198176b46341b5f0cf91ad5cecdb8b8d02471a13 100644 (file)
--- a/queue-6.8/series
+++ b/queue-6.8/series
@@ -195,3 +195,4 @@ riscv-disable-preemption-when-using-patch_map.patch
 nfsd-hold-a-lighter-weight-client-reference-over-cb_.patch
 lib-stackdepot-move-stack_record-struct-definition-i.patch
 stackdepot-rename-pool_index-to-pool_index_plus_1.patch
+x86-retpoline-add-noendbr-annotation-to-the-srso-dummy-return-thunk.patch

diff --git a/queue-6.8/x86-retpoline-add-noendbr-annotation-to-the-srso-dummy-return-thunk.patch b/queue-6.8/x86-retpoline-add-noendbr-annotation-to-the-srso-dummy-return-thunk.patch
new file mode 100644 (file)
index 0000000..141e62c
--- /dev/null
+++ b/queue-6.8/x86-retpoline-add-noendbr-annotation-to-the-srso-dummy-return-thunk.patch
@@ -0,0 +1,35 @@
+From b377c66ae3509ccea596512d6afb4777711c4870 Mon Sep 17 00:00:00 2001
+From: "Borislav Petkov (AMD)" <bp@alien8.de>
+Date: Fri, 5 Apr 2024 16:46:37 +0200
+Subject: x86/retpoline: Add NOENDBR annotation to the SRSO dummy return thunk
+
+From: Borislav Petkov (AMD) <bp@alien8.de>
+
+commit b377c66ae3509ccea596512d6afb4777711c4870 upstream.
+
+srso_alias_untrain_ret() is special code, even if it is a dummy
+which is called in the !SRSO case, so annotate it like its real
+counterpart, to address the following objtool splat:
+
+  vmlinux.o: warning: objtool: .export_symbol+0x2b290: data relocation to !ENDBR: srso_alias_untrain_ret+0x0
+
+Fixes: 4535e1a4174c ("x86/bugs: Fix the SRSO mitigation on Zen3/4")
+Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
+Signed-off-by: Ingo Molnar <mingo@kernel.org>
+Cc: Linus Torvalds <torvalds@linux-foundation.org>
+Link: https://lore.kernel.org/r/20240405144637.17908-1-bp@kernel.org
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/x86/lib/retpoline.S |    1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/x86/lib/retpoline.S
++++ b/arch/x86/lib/retpoline.S
+@@ -230,6 +230,7 @@ SYM_CODE_END(srso_return_thunk)
+ /* Dummy for the alternative in CALL_UNTRAIN_RET. */
+ SYM_CODE_START(srso_alias_untrain_ret)
+       ANNOTATE_UNRET_SAFE
++      ANNOTATE_NOENDBR
+       ret
+       int3
+ SYM_FUNC_END(srso_alias_untrain_ret)