On Sat, Feb 15, 2025 at 06:24:50PM +0800, Baoquan He wrote: > On 02/14/25 at 06:44pm, kernel test robot wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > > head: 128c8f96eb8638c060cd3532dc394d046ce64fe1 > > commit: 443cbaf9e2fdbef7d7cae457434a6cb8a679441b crash: split vmcoreinfo exporting code out from crash_core.c > > date: 12 months ago > > config: riscv-randconfig-r073-20250213 (https://download.01.org/0day-ci/archive/20250214/202502141843.5QoKdQ7g-lkp@xxxxxxxxx/config) > > compiler: riscv32-linux-gcc (GCC) 14.2.0 > > > > 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 <lkp@xxxxxxxxx> > > | Closes: https://lore.kernel.org/oe-kbuild-all/202502141843.5QoKdQ7g-lkp@xxxxxxxxx/ > > > > smatch warnings: > > kernel/vmcore_info.c:117 paddr_vmcoreinfo_note() warn: unsigned '_x' is never less than zero. > > Thanks for reporting this. > > I am preparing to reproduce this issue, while I may not know what are > the steps to reproduce. Just run smatch or just build with the provided > riscv-randconfig-r073-20250213? Sorry for late reply, this is from smatch. There're multiple reports similar to this, and one discussion is at [1], not sure whether this is a false positive. [1] https://lore.kernel.org/oe-kbuild-all/Z7PWuSA4jtZnxp5J@rli9-mobl/T/#t > > > > > vim +/_x +117 kernel/vmcore_info.c > > > > 114 > > 115 phys_addr_t __weak paddr_vmcoreinfo_note(void) > > 116 { > > > 117 return __pa(vmcoreinfo_note); > > 118 } > > 119 EXPORT_SYMBOL(paddr_vmcoreinfo_note); > > 120 > > > > -- > > 0-DAY CI Kernel Test Service > > https://github.com/intel/lkp-tests/wiki > > > >
