================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: null-ptr-deref in atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] BUG: KASAN: null-ptr-deref in get_mm_counter include/linux/mm.h:1996 [inline] BUG: KASAN: null-ptr-deref in get_mm_rss include/linux/mm.h:2049 [inline] BUG: KASAN: null-ptr-deref in task_nr_scan_windows.isra.0+0x23/0x120 kernel/sched/fair.c:1123 Read of size 8 at addr 00000000000003f0 by task swapper/0/1 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.18.0-rc6-next-20220510-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_report mm/kasan/report.c:432 [inline] kasan_report.cold+0x61/0x1c6 mm/kasan/report.c:491 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] get_mm_counter include/linux/mm.h:1996 [inline] get_mm_rss include/linux/mm.h:2049 [inline] task_nr_scan_windows.isra.0+0x23/0x120 kernel/sched/fair.c:1123 task_scan_min kernel/sched/fair.c:1144 [inline] task_scan_start+0x6c/0x400 kernel/sched/fair.c:1150 task_tick_numa kernel/sched/fair.c:2944 [inline] task_tick_fair+0xaeb/0xef0 kernel/sched/fair.c:11186 scheduler_tick+0x20a/0x5e0 kernel/sched/core.c:5387 update_process_times+0x191/0x200 kernel/time/timer.c:1816 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243 tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1481 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:lock_acquire+0x1ef/0x570 kernel/locking/lockdep.c:5633 Code: 38 a4 7e 83 f8 01 0f 85 e8 02 00 00 9c 58 f6 c4 02 0f 85 fb 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0000:ffffc90000067b70 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff9200000cf70 RCX: ffffffff815dec2e RDX: 1ffff1102802e14b RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff900a18bf R10: fffffbfff2014317 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888016e805b0 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:360 [inline] d_instantiate fs/dcache.c:2035 [inline] d_instantiate+0x62/0x90 fs/dcache.c:2030 tracefs_create_file+0x2b5/0x600 fs/tracefs/inode.c:492 trace_create_file+0x2f/0x50 kernel/trace/trace.c:8824 event_create_dir+0x3f8/0x1320 kernel/trace/trace_events.c:2429 __trace_early_add_event_dirs+0x7e/0xf0 kernel/trace/trace_events.c:3478 early_event_add_tracer kernel/trace/trace_events.c:3645 [inline] event_trace_init+0x9e/0x113 kernel/trace/trace_events.c:3805 tracer_init_tracefs+0xf9/0x457 kernel/trace/trace.c:9722 do_one_initcall+0x103/0x650 init/main.c:1301 do_initcall_level init/main.c:1376 [inline] do_initcalls init/main.c:1392 [inline] do_basic_setup init/main.c:1411 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1618 kernel_init+0x1a/0x1d0 init/main.c:1507 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:297 </TASK> ================================================================== ---------------- Code disassembly (best guess): 0: 38 a4 7e 83 f8 01 0f cmp %ah,0xf01f883(%rsi,%rdi,2) 7: 85 e8 test %ebp,%eax 9: 02 00 add (%rax),%al b: 00 9c 58 f6 c4 02 0f add %bl,0xf02c4f6(%rax,%rbx,2) 12: 85 fb test %edi,%ebx 14: 02 00 add (%rax),%al 16: 00 48 83 add %cl,-0x7d(%rax) 19: 7c 24 jl 0x3f 1b: 08 00 or %al,(%rax) 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction 2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) 3b: 00 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24