On Mon, 10 Mar 2025 at 22:44, Borislav Petkov bp@alien8.de wrote:
Just to report this, bisection tomorrow unless someone figures it out in the meantime...
This is 64-bit, allmodconfig, clang:
clang --version Ubuntu clang version 15.0.7 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin
This guy:
Ubuntu clang version 18.1.3 (1ubuntu1) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin
on the other box builds fine.
tip/master:
commit bc6bc2e1d7fa7e950c5ffb1ddf19bbaf15ad8863 (HEAD, refs/remotes/tip/master) Merge: f00b8d0b903a 72dafb567760 Author: Ingo Molnar mingo@kernel.org Date: Mon Mar 10 21:57:15 2025 +0100
Merge branch into tip/master: 'x86/sev' # New commits in x86/sev: 72dafb567760 ("x86/sev: Add missing RIP_REL_REF() invocations during sme_enable()") Signed-off-by: Ingo Molnar <mingo@kernel.org>vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x30: relocation to !ENDBR: .text+0x180475 Absolute reference to symbol '__ref_stack_chk_guard' not permitted in .head.text make[3]: *** [arch/x86/Makefile.postlink:28: vmlinux] Error 1 make[2]: *** [scripts/Makefile.vmlinux:77: vmlinux] Error 2 make[2]: *** Deleting file 'vmlinux' make[1]: *** [/home/amd/kernel/linux/Makefile:1234: vmlinux] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:251: __sub-make] Error 2
I tried building allmodconfig from the same commit using
$ clang-15 -v Debian clang version 15.0.7 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin
but it does not reproduce for me.
$ make LLVM=-15 bzImage -j100 -s drivers/spi/spi-amd.o: warning: objtool: amd_set_spi_freq() falls through to next function amd_spi_busy_wait() vmlinux.o: warning: objtool: screen_info_fixup_lfb+0x562: stack state mismatch: reg1[12]=-2-48 reg2[12]=-1+0 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x30: relocation to !ENDBR: .text+0x17f535
and no error.
Could you capture the output of
objdump -dr .tmp_vmlinux2 --section .head.text
and share it somewhere please?