rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2685 jiffies s: 593 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5074 Comm: kworker/1:3 Not tainted 6.7.0-rc4-syzkaller-00818-g2483e7f04ce0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Workqueue: events linkwatch_event RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline] RIP: 0010:kasan_check_range+0x10d/0x190 mm/kasan/generic.c:187 Code: 00 00 7c 0b 44 89 c2 e8 71 ed ff ff 83 f0 01 5b 5d 41 5c c3 48 85 d2 74 4f 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 41 80 38 00 <74> f2 eb b6 41 bc 08 00 00 00 45 29 dc 49 8d 14 2c eb 0c 48 83 c0 RSP: 0018:ffffc9000482fc30 EFLAGS: 00000046 RAX: ffffed100dbe3029 RBX: ffffed100dbe302a RCX: ffffffff8876eb50 RDX: ffffed100dbe302a RSI: 0000000000000008 RDI: ffff88806df18148 RBP: ffffed100dbe3029 R08: 0000000000000000 R09: ffffed100dbe3029 R10: ffff88806df1814f R11: 0000000000000003 R12: 00000000000000bd R13: ffff88806df18148 R14: ffff88806df18000 R15: ffff88806df186b0 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff0f98c35c0 CR3: 000000006bd50000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] netif_device_present include/linux/netdevice.h:4362 [inline] __linkwatch_run_queue+0x230/0x460 net/core/link_watch.c:223 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:273 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242