audit: type=1326 audit(1529731527.925:1392): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8780 comm="syz-executor1" exe="/root/syz-executor1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x455a99 code=0x0 audit: type=1326 audit(1529731527.926:1393): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8782 comm="syz-executor3" exe="/root/syz-executor3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x455a99 code=0x0 ================================================================== BUG: KMSAN: uninit-value in __list_add_valid+0x1a2/0x450 lib/list_debug.c:23 audit: type=1326 audit(1529731527.992:1394): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8766 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x455a99 code=0x0 CPU: 1 PID: 4496 Comm: syz-executor7 Not tainted 4.17.0+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620 __list_add_valid+0x1a2/0x450 lib/list_debug.c:23 __list_add include/linux/list.h:60 [inline] list_add include/linux/list.h:79 [inline] account_entity_enqueue kernel/sched/fair.c:2652 [inline] enqueue_entity kernel/sched/fair.c:4176 [inline] enqueue_task_fair+0xe12/0x4490 kernel/sched/fair.c:5359 enqueue_task kernel/sched/core.c:751 [inline] activate_task kernel/sched/core.c:770 [inline] ttwu_activate kernel/sched/core.c:1658 [inline] ttwu_do_activate kernel/sched/core.c:1717 [inline] ttwu_queue kernel/sched/core.c:1862 [inline] try_to_wake_up+0x162f/0x2260 kernel/sched/core.c:2075 audit: type=1326 audit(1529731528.061:1395): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=8804 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x455a99 code=0x0 wake_up_process+0x34/0x40 kernel/sched/core.c:2148 hrtimer_wakeup+0xac/0x100 kernel/time/hrtimer.c:1647 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc54/0x1630 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:866 RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:78 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x5a/0x80 kernel/locking/spinlock.c:184 RSP: 0018:ffff88007025fb80 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 RAX: ffff880193a9a020 RBX: ffff880194a1a020 RCX: ffff880000000000 RDX: ffff880193aa6020 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 RBP: ffff88007025fbb8 R08: 0000000001080020 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff81223ec0 R12: 0000000000000000 R13: ffff880193a9a020 R14: 0000000000000000 R15: 0000000000000296 spin_unlock_irqrestore include/linux/spinlock.h:365 [inline] remove_wait_queue+0x1ed/0x2b0 kernel/sched/wait.c:45 do_wait+0xb26/0xbd0 kernel/exit.c:1548 kernel_wait4+0x337/0x4b0 kernel/exit.c:1667 __do_sys_wait4 kernel/exit.c:1679 [inline] __se_sys_wait4 kernel/exit.c:1675 [inline] __x64_sys_wait4+0x17c/0x320 kernel/exit.c:1675 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x40fd9a RSP: 002b:0000000000a3eab8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 00000000000acd9c RCX: 000000000040fd9a RDX: 0000000040000001 RSI: 0000000000a3ead4 RDI: ffffffffffffffff RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000bb2940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000caf R14: 0000000000a3f160 R15: 00000000000ac960 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline] kmsan_save_stack mm/kmsan/kmsan.c:297 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464 __write_once_size include/linux/compiler.h:224 [inline] __list_add include/linux/list.h:66 [inline] list_add include/linux/list.h:79 [inline] list_move include/linux/list.h:171 [inline] pick_next_task_fair+0x249e/0x2530 kernel/sched/fair.c:6968 pick_next_task+0x1ba/0x420 kernel/sched/core.c:3368 __schedule+0x20f/0x770 kernel/sched/core.c:3498 preempt_schedule_common kernel/sched/core.c:3648 [inline] _cond_resched+0x5e/0xd0 kernel/sched/core.c:4999 zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1471 [inline] zap_p4d_range mm/memory.c:1492 [inline] unmap_page_range+0x35e0/0x3be0 mm/memory.c:1513 unmap_single_vma+0x445/0x5e0 mm/memory.c:1558 unmap_vmas+0x1f4/0x360 mm/memory.c:1588 exit_mmap+0x4d7/0x980 mm/mmap.c:3105 __mmput+0x158/0x600 kernel/fork.c:962 mmput+0xab/0xf0 kernel/fork.c:983 exit_mm+0x6ed/0x7a0 kernel/exit.c:545 do_exit+0xc12/0x3930 kernel/exit.c:854 do_group_exit+0x1a0/0x360 kernel/exit.c:970 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline] kmsan_save_stack mm/kmsan/kmsan.c:297 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464 __rb_insert lib/rbtree.c:104 [inline] rb_insert_color_cached+0xddf/0x1370 lib/rbtree.c:469 __enqueue_entity kernel/sched/fair.c:561 [inline] enqueue_entity kernel/sched/fair.c:4185 [inline] enqueue_task_fair+0x181a/0x4490 kernel/sched/fair.c:5359 enqueue_task kernel/sched/core.c:751 [inline] activate_task kernel/sched/core.c:770 [inline] ttwu_activate kernel/sched/core.c:1658 [inline] ttwu_do_activate kernel/sched/core.c:1717 [inline] ttwu_queue kernel/sched/core.c:1862 [inline] try_to_wake_up+0x162f/0x2260 kernel/sched/core.c:2075 wake_up_process+0x34/0x40 kernel/sched/core.c:2148 hrtimer_wakeup+0xac/0x100 kernel/time/hrtimer.c:1647 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc54/0x1630 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 Local variable description: ----t.i.i@__se_sys_nanosleep Variable was created at: __se_sys_nanosleep+0x5f/0x6a0 kernel/time/hrtimer.c:1762 __x64_sys_nanosleep+0x92/0xc0 kernel/time/hrtimer.c:1762 ==================================================================