rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2680 jiffies s: 34509 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 15803 Comm: syz-executor.0 Not tainted 6.8.0-rc7-syzkaller-00139-g84e95149bd34 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:134 [inline] RIP: 0010:lock_release+0x613/0x9d0 kernel/locking/lockdep.c:5777 Code: 24 90 00 00 00 00 00 00 00 9c 8f 84 24 90 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 e7 49 84 00 f6 84 24 91 00 00 00 02 75 77 <41> f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 4b c7 04 RSP: 0018:ffffc90000007a20 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 1ffff92000000f56 RCX: ffffc90000007a03 RDX: 0000000000000002 RSI: ffffffff8baac7e0 RDI: ffffffff8bfe6da0 RBP: ffffc90000007b50 R08: ffffffff8f856c2f R09: 1ffffffff1f0ad85 R10: dffffc0000000000 R11: fffffbfff1f0ad86 R12: 1ffff92000000f50 R13: 0000000000000046 R14: ffffc90000007ab0 R15: dffffc0000000000 FS: 00007f8ccfe6f6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555572a18f8 CR3: 000000001fcae000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline] _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194 debug_object_activate+0x3e3/0x510 lib/debugobjects.c:726 debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline] debug_activate kernel/time/hrtimer.c:477 [inline] enqueue_hrtimer+0x30/0x3a0 kernel/time/hrtimer.c:1087 __run_hrtimer kernel/time/hrtimer.c:1706 [inline] __hrtimer_run_queues+0x6b4/0xd00 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x107/0x3a0 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x92/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x504/0x29e0 arch/x86/kernel/unwind_orc.c:494 Code: 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 5c 45 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 34 <48> 63 2b 48 01 dd 48 89 ef 4c 89 f6 e8 fb 1e 53 00 48 8d 43 04 4c RSP: 0018:ffffc90003196aa8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8f9d53fc RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff81f5546e RDI: ffffffff81f554b0 RBP: ffffffff81f554b0 R08: ffffffff81405265 R09: ffffc90003196c70 R10: 0000000000000003 R11: ffffffff818045c0 R12: ffffffff8f9d5400 R13: ffffffff8f9d53fc R14: ffffffff81f5546e R15: ffffffff8f9d53f8 arch_stack_walk+0x150/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x117/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc_node+0x18f/0x380 mm/slub.c:3903 __alloc_skb+0x181/0x420 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1296 [inline] qdisc_notify+0x11b/0x4b0 net/sched/sch_api.c:1043 tc_modify_qdisc+0x1c58/0x1e40 net/sched/sch_api.c:1748 rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6617 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f8ccf07cbe9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8ccfe6f0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8ccf19bf80 RCX: 00007f8ccf07cbe9 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 00007f8ccf0c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8ccf19bf80 R15: 00007ffff1de9e48