Messages in this thread |  | | Date | Sat, 12 Mar 2022 14:32:26 +0800 | From | kernel test robot <> | Subject | arch/arm64/kernel/proton-pack.c:953 this_cpu_set_vectors() warn: unsigned 'slot' is never less than zero. |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 68453767131a5deec1e8f9ac92a9042f929e585d commit: 558c303c9734af5a813739cd284879227f7297d2 arm64: Mitigate spectre style branch history side channels date: 2 weeks ago config: arm64-randconfig-m031-20220310 (https://download.01.org/0day-ci/archive/20220312/202203121458.ZX5wQMAu-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 11.2.0
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
smatch warnings: arch/arm64/kernel/proton-pack.c:953 this_cpu_set_vectors() warn: unsigned 'slot' is never less than zero.
vim +/slot +953 arch/arm64/kernel/proton-pack.c
948 949 static void this_cpu_set_vectors(enum arm64_bp_harden_el1_vectors slot) 950 { 951 const char *v = arm64_get_bp_hardening_vector(slot); 952 > 953 if (slot < 0) 954 return; 955 956 __this_cpu_write(this_cpu_vector, v); 957 958 /* 959 * When KPTI is in use, the vectors are switched when exiting to 960 * user-space. 961 */ 962 if (arm64_kernel_unmapped_at_el0()) 963 return; 964 965 write_sysreg(v, vbar_el1); 966 isb(); 967 } 968
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