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https://github.com/paulmckrcu/linux dev.2024.12.23a in testcase: rcutorture version: with following parameters: runtime: 300s test: cpuhotplug torture_type: srcud config: x86_64-randconfig-074-20241226 compiler: gcc-12 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) 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/oe-lkp/202412271623.8ceb422e-lkp@intel.com [ 434.917288][ T2320] ------------[ cut here ]------------ [ 434.938323][ T2320] UBSAN: array-index-out-of-bounds in kernel/rcu/srcutree.c:1918:9 [ 434.941267][ T2320] index -23500 is out of range for type 'srcu_ctr [2]' [ 434.942019][ T2320] CPU: 1 UID: 0 PID: 2320 Comm: rmmod Tainted: G T 6.13.0-rc1-00070-gc634c0678e8b #1 [ 434.943103][ T2320] Tainted: [T]=RANDSTRUCT [ 434.943530][ T2320] Call Trace: [ 434.943893][ T2320] [ 434.944224][ T2320] dump_stack_lvl (lib/dump_stack.c:123) [ 434.944766][ T2320] ubsan_epilogue (lib/ubsan.c:232) [ 434.945286][ T2320] __ubsan_handle_out_of_bounds (lib/ubsan.c:429) [ 434.945896][ T2320] srcu_torture_stats_print (kernel/rcu/srcutree.c:1918) [ 434.946535][ T2320] rcu_torture_stats_print (kernel/rcu/rcutorture.c:2445) rcutorture [ 434.947574][ T2320] ? rcu_torture_preempt (kernel/rcu/rcutorture.c:2362) rcutorture [ 434.948560][ T2320] ? kfree (mm/slub.c:4598 mm/slub.c:4746) [ 434.948994][ T2320] ? vfree (mm/vmalloc.c:3388) [ 434.949526][ T2320] ? rcu_torture_mem_dump_obj (kernel/rcu/rcutorture.c:2489) rcutorture [ 434.950627][ T2320] ? __sanitizer_cov_trace_pc (kernel/kcov.c:217) [ 434.951294][ T2320] ? cleanup_srcu_struct (kernel/rcu/srcutree.c:711) [ 434.951899][ T2320] rcu_torture_cleanup (kernel/rcu/rcutorture.c:3664) rcutorture [ 434.952906][ T2320] ? ftrace_likely_update (arch/x86/include/asm/smap.h:56 kernel/trace/trace_branch.c:225) [ 434.953470][ T2320] ? rcu_torture_print_module_parms+0x104/0x104 rcutorture [ 434.954601][ T2320] ? __mutex_unlock_slowpath (kernel/locking/mutex.c:914) [ 434.955225][ T2320] ? build_sched_groups (kernel/sched/wait.c:383) [ 434.955799][ T2320] ? write_comp_data (kernel/kcov.c:246) [ 434.956334][ T2320] ? ftrace_likely_update (arch/x86/include/asm/smap.h:56 kernel/trace/trace_branch.c:225) [ 434.956905][ T2320] ? __sanitizer_cov_trace_pc (kernel/kcov.c:217) [ 434.961646][ T2320] __do_sys_delete_module+0x36a/0x4ed [ 434.962321][ T2320] ? module_flags (kernel/module/main.c:732) [ 434.962828][ T2320] ? ftrace_likely_update (kernel/trace/trace_branch.c:220) [ 434.963408][ T2320] ? write_comp_data (kernel/kcov.c:246) [ 434.963949][ T2320] ? ftrace_likely_update (kernel/trace/trace_branch.c:220) [ 434.964556][ T2320] ? ftrace_likely_update (kernel/trace/trace_branch.c:220) [ 434.965115][ T2320] ? write_comp_data (kernel/kcov.c:246) [ 434.965639][ T2320] ? ftrace_likely_update (arch/x86/include/asm/smap.h:56 kernel/trace/trace_branch.c:225) [ 434.966188][ T2320] ? __sanitizer_cov_trace_pc (kernel/kcov.c:217) [ 434.966797][ T2320] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 434.967296][ T2320] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 434.967978][ T2320] [ 434.968715][ T2320] ---[ end trace ]--- The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241227/202412271623.8ceb422e-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki