===================================================== BUG: KMSAN: uninit-value in run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698 CPU: 1 PID: 11427 Comm: kworker/1:2 Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 __hlist_del include/linux/list.h:763 [inline] detach_timer kernel/time/timer.c:811 [inline] expire_timers kernel/time/timer.c:1356 [inline] __run_timers+0xb99/0x11a0 kernel/time/timer.c:1685 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698 __do_softirq+0x4a1/0x83a kernel/softirq.c:293 invoke_softirq kernel/softirq.c:375 [inline] irq_exit+0x230/0x280 kernel/softirq.c:416 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:537 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837 RIP: 0010:console_unlock+0x191b/0x1cb0 kernel/printk/printk.c:2486 Code: 24 18 48 8b 9c 24 a8 00 00 00 e8 70 b0 00 00 48 83 bc 24 d0 00 00 00 00 75 34 48 89 9c 24 18 01 00 00 ff b4 24 18 01 00 00 9d <44> 89 f0 34 01 22 44 24 31 44 89 f3 0a 5c 24 0f 3c 01 74 1e f6 c3 RSP: 0018:ffff88809999f260 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 5ea5101b61ef5a00 RBX: 0000000000000282 RCX: ffff8881075b8000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000035420 RBP: ffff88809999f3d8 R08: 0000000000000000 R09: ffff888217c9e878 R10: 0000000000000000 R11: ffffffff8667efa0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: ffff8881075b89a0 vprintk_emit+0x45b/0x8f0 kernel/printk/printk.c:2003 dev_vprintk_emit+0x940/0xb28 drivers/base/core.c:3283 dev_printk_emit+0x1ce/0x210 drivers/base/core.c:3294 __dev_printk+0x3af/0x460 drivers/base/core.c:3306 _dev_info+0x1e5/0x22a drivers/base/core.c:3352 usb_disconnect+0x1ad/0xd60 drivers/usb/core/hub.c:2181 hub_port_connect drivers/usb/core/hub.c:4949 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x3fd0/0x72f0 drivers/usb/core/hub.c:5441 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x189c/0x2460 kernel/workqueue.c:2417 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Uninit was created at: kmsan_save_stack_with_flags+0x3a/0x80 mm/kmsan/kmsan.c:150 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:364 [inline] kmsan_alloc_page+0x151/0x360 mm/kmsan/kmsan_shadow.c:400 __alloc_pages_nodemask+0x142d/0x5fa0 mm/page_alloc.c:4757 alloc_pages_current+0x68d/0x9a0 mm/mempolicy.c:2153 alloc_pages include/linux/gfp.h:511 [inline] alloc_slab_page+0x10e/0x12c0 mm/slub.c:1535 allocate_slab mm/slub.c:1680 [inline] new_slab+0x2ca/0x1a00 mm/slub.c:1747 new_slab_objects mm/slub.c:2496 [inline] ___slab_alloc+0x1423/0x1fb0 mm/slub.c:2647 __slab_alloc mm/slub.c:2687 [inline] slab_alloc_node mm/slub.c:2750 [inline] slab_alloc mm/slub.c:2799 [inline] kmem_cache_alloc_trace+0xae5/0xd20 mm/slub.c:2816 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:748 [inline] uevent_show+0x358/0x720 drivers/base/core.c:1222 dev_attr_show+0xd8/0x1e0 drivers/base/core.c:931 sysfs_kf_seq_show+0x434/0x7b0 fs/sysfs/file.c:60 kernfs_seq_show+0x164/0x1e0 fs/kernfs/file.c:167 seq_read+0xac6/0x1d90 fs/seq_file.c:229 kernfs_fop_read+0x2c3/0x9a0 fs/kernfs/file.c:251 __vfs_read+0x1a9/0xc90 fs/read_write.c:425 vfs_read+0x359/0x6f0 fs/read_write.c:461 ksys_read+0x265/0x430 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read+0x92/0xb0 fs/read_write.c:595 __x64_sys_read+0x4a/0x70 fs/read_write.c:595 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 =====================================================