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Fri, 20 Jun 2025 10:35:45 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Fri, 20 Jun 2025 16:33:49 +0200 From: "Arnd Bergmann" To: "Josh Poimboeuf" , "Peter Zijlstra" Cc: x86@kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev Message-Id: Subject: linux-next-20250620 objtool errors and warnings with clang-21-20250619105726 Content-Type: text/plain Content-Transfer-Encoding: 7bit Hi Josh and Peter, I came across some new build failures from objtool errors today. I have not run this for long yet, but this is what I got so far: https://pastebin.com/vM26CVnJ lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch+0xe0: call to __msan_memset() with UACCESS enabled lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch_v1+0xfd: call to __msan_memset() with UACCESS enabled kernel/bpf/core.o: warning: objtool: ___bpf_prog_run+0x20f: sibling call from callable instruction with modified stack frame drivers/gpu/drm/vmwgfx/vmwgfx_msg.o: warning: objtool: vmw_host_printf+0xe: unknown CFA base reg 0 https://pastebin.com/5UppA6JZ mm/vmscan.o: warning: objtool: shrink_lruvec+0x198f: sibling call from callable instruction with modified stack frame drivers/usb/host/xhci.o: warning: objtool: xhci_configure_endpoint+0x15bd: undefined stack state drivers/usb/host/xhci.o: warning: objtool: xhci_configure_endpoint+0x15b5: unknown CFA base reg -1 drivers/gpu/drm/vmwgfx/vmwgfx_msg.o: warning: objtool: vmw_host_printf+0x9: unknown CFA base reg 0 Arnd