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X-CSE-ConnectionGUID: PpJz3uHpT2C21wGUZnWBqg== X-CSE-MsgGUID: t8GM8yUcT5aAEnhKewPQCQ== X-IronPort-AV: E=McAfee;i="6800,10657,11922"; a="90832288" X-IronPort-AV: E=Sophos;i="6.27,134,1787036400"; d="scan'208";a="90832288" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Oct 2026 06:42:40 -0700 X-CSE-ConnectionGUID: F28L6gg1QEC6Sjqhy9tlqw== X-CSE-MsgGUID: HaEiwu1qTsGjiER6UrcwEQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,134,1787036400"; d="scan'208";a="303931401" Received: from igk-lkp-server01.igk.intel.com (HELO 3fb566d470b1) ([10.211.93.152]) by fmviesa001.fm.intel.com with ESMTP; 01 Oct 2026 06:42:40 -0700 Received: from kbuild by 3fb566d470b1 with local (Exim 4.98.2) (envelope-from ) id 1xCH3V-0000000006t-0YO5; Thu, 01 Oct 2026 13:42:37 +0000 Date: Thu, 01 Oct 2026 15:42:04 +0200 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com Subject: kernel/bpf/verifier.c:15657:undefined reference to `__umoddi3' Message-ID: <202610011511.kp41YMdn-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: :::::: :::::: Manual check reason: "low confidence bisect report" :::::: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev TO: Eduard Zingerman CC: 0day robot tree: https://github.com/intel-lab-lkp/linux/commits/Eduard-Zingerman/bpf-track-may_write-flags-in-liveness/20260926-071959 head: 588faaac20422c91861700e863668674da9cc06f commit: d4a6f606bf5cbb4d84b533905e932f4a79fe17e3 bpf: representation for intervals with steps date: 5 days ago :::::: branch date: 5 days ago :::::: commit date: 5 days ago config: i386-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20261001/202610011511.kp41YMdn-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261001/202610011511.kp41YMdn-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/r/202610011511.kp41YMdn-lkp@intel.com/ All errors (new ones prefixed by >>): ld: kernel/bpf/verifier.o: in function `scalar_step_lsh': >> kernel/bpf/verifier.c:15657:(.text+0x14102): undefined reference to `__umoddi3' ld: kernel/bpf/verifier.o: in function `scalar_step_mul': kernel/bpf/verifier.c:15646:(.text+0x15376): undefined reference to `__umoddi3' vim +15657 kernel/bpf/verifier.c d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15650 d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15651 static void scalar_step_lsh(struct bpf_reg_state *dst_reg, struct bpf_reg_state *src_reg) d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15652 { d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15653 u64 amount = src_reg->var_off.value; d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15654 d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15655 if (tnum_is_const(src_reg->var_off) && amount < 64 && d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15656 !check_mul_overflow(dst_reg->step, 1ull << amount, &dst_reg->step)) d4a6f606bf5cbb Eduard Zingerman 2026-09-26 @15657 dst_reg->base = (dst_reg->base * (1ull << amount)) % dst_reg->step; d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15658 else d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15659 reg_step_reset(dst_reg); d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15660 } d4a6f606bf5cbb Eduard Zingerman 2026-09-26 15661 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki