Sabyrzhan Tasbolatov 1db272864f x86/traps: move kmsan check after instrumentation_begin ... During x86_64 kernel build with CONFIG_KMSAN, the objtool warns following: AR built-in.a AR vmlinux.a LD vmlinux.o vmlinux.o: warning: objtool: handle_bug+0x4: call to kmsan_unpoison_entry_regs() leaves .noinstr.text section OBJCOPY modules.builtin.modinfo GEN modules.builtin MODPOST Module.symvers CC .vmlinux.export.o Moving kmsan_unpoison_entry_regs() _after_ instrumentation_begin() fixes the warning. There is decode_bug(regs->ip, &imm) is left before KMSAN unpoisoining, but it has the return condition and if we include it after instrumentation_begin() it results the warning "return with instrumentation enabled", hence, I'm concerned that regs will not be KMSAN unpoisoned if `ud_type == BUG_NONE` is true. Link: https://lkml.kernel.org/r/20241016152407.3149001-1-snovitoll@gmail.com Fixes: ba54d194f8 ("x86/traps: avoid KMSAN bugs originating from handle_bug()") Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com> Reviewed-by: Alexander Potapenko <glider@google.com> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2024-10-28 21:40:39 -07:00
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crypto	move asm/unaligned.h to linux/unaligned.h	2024-10-02 17:23:23 -04:00
entry	- Explicitly disable the TSC deadline timer when going idle to address	2024-10-20 12:04:32 -07:00
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include	x86: fix whitespace in runtime-const assembler output	2024-10-25 09:53:03 -07:00
kernel	x86/traps: move kmsan check after instrumentation_begin	2024-10-28 21:40:39 -07:00
kvm	KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory	2024-10-20 07:31:06 -04:00
lib	x86: fix user address masking non-canonical speculation issue	2024-10-25 09:53:03 -07:00
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virt	x86/sev: Ensure that RMP table fixups are reserved	2024-10-23 12:34:06 +02:00
xen	x86/xen: mark boot CPU of PV guest in MSR_IA32_APICBASE	2024-10-08 16:18:57 +02:00
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Kconfig	x86/lam: Disable ADDRESS_MASKING in most cases	2024-10-21 15:05:43 -07:00
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