rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2685 jiffies s: 681 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: 4759 Comm: dhcpcd Not tainted 6.10.0-rc4-syzkaller-00802-ga6ec08beec9e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0xa2/0x350 kernel/locking/lockdep.c:4656
Code: 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 25 fb 92 be 08 00 00 00 e8 f6 0c 89 00 48 0f a3 1d 6e 4d 88 11 <73> 10 48 69 c3 c8 00 00 00 48 8d 98 80 84 c9 92 eb 68 48 c7 c0 e0
RSP: 0018:ffffc900000078c8 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8172d80a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92fb2580
RBP: 0000000000000008 R08: ffffffff92fb2587 R09: 1ffffffff25f64b0
R10: dffffc0000000000 R11: fffffbfff25f64b1 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000100 R15: ffff888029a9a908
FS:  00007feade8d0740(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feadea7c580 CR3: 000000002d188000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 mark_usage kernel/locking/lockdep.c:4599 [inline]
 __lock_acquire+0xc0a/0x1fd0 kernel/locking/lockdep.c:5091
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x16d/0x510 lib/debugobjects.c:708
 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
 debug_activate kernel/time/hrtimer.c:478 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1085
 __run_hrtimer kernel/time/hrtimer.c:1704 [inline]
 __hrtimer_run_queues+0x6cb/0xd50 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x192d/0x2a00
Code: 24 48 74 08 4c 89 f7 e8 81 da ba 00 49 89 1e 42 0f b6 44 2d 00 84 c0 0f 85 61 0e 00 00 48 8b 44 24 20 c6 00 00 4c 8b 74 24 48 <48> 8b 6c 24 28 48 8b 44 24 38 42 0f b6 04 28 84 c0 0f 85 ea 0b 00
RSP: 0018:ffffc9000409ef28 EFLAGS: 00000246
RAX: ffffc9000409f050 RBX: ffffc9000409f038 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000409f060
RBP: ffffc9000409f048 R08: ffffc9000409f05f R09: 0000000000000000
R10: ffffc9000409f050 R11: fffff52000813e0c R12: ffffc9000409f5b8
R13: dffffc0000000000 R14: ffffc9000409f050 R15: 1ffff92000813e00
 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 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:3941 [inline]
 slab_alloc_node mm/slub.c:4001 [inline]
 kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4044
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:656
 alloc_skb include/linux/skbuff.h:1320 [inline]
 alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6509
 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2815
 unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:1976
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 sock_write_iter+0x2dd/0x400 net/socket.c:1160
 do_iter_readv_writev+0x5a4/0x800
 vfs_writev+0x395/0xbe0 fs/read_write.c:971
 do_writev+0x1b1/0x350 fs/read_write.c:1018
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feade99ee03
Code: 89 c7 48 89 44 24 08 e8 6a f2 f9 ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6d 48 8b 15 f6 5f 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffed42ab1d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007ffed42cb638 RCX: 00007feade99ee03
RDX: 0000000000000005 RSI: 00007ffed42ab1f0 RDI: 0000000000000011
RBP: 00007ffed42cb638 R08: 0000000000000011 R09: 00007ffed42ab230
R10: 00007ffed42ab238 R11: 0000000000000246 R12: 000055e7805ba660
R13: 00007ffed42bb478 R14: 0000000000000148 R15: 0000000000000004
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 3.110 msecs