rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=605/1/0x4000000000000002 softirq=6622/6623 fqs=5242 
	(detected by 1, t=10502 jiffies, g=7133, q=1465)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4355 Comm: syz.2.18 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x13/0x80 kernel/kcov.c:293
Code: 4a 89 7c 02 10 4a 89 74 02 18 4a 89 44 02 20 48 ff c1 48 89 0a c3 90 48 8b 04 24 65 48 8b 0d 44 a9 8a 7e 65 8b 15 45 a9 8a 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 5b 83 b9 34 16 00 00
RSP: 0018:ffffc90000006ff8 EFLAGS: 00000046
RAX: ffffffff819b1931 RBX: 0000000000000001 RCX: ffff88807c7a3b80
RDX: 0000000000000101 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000007130 R08: dffffc0000000000 R09: fffffbfff1ff7419
R10: fffffbfff1ff7419 R11: 1ffffffff1ff7418 R12: 1ffff92000000e10
R13: 0000000000000068 R14: ffffc90000007180 R15: ffffc90000007340
FS:  00007f65dafe16c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c331ac3 CR3: 00000000260d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __perf_output_begin kernel/events/ring_buffer.c:170 [inline]
 perf_output_begin_forward+0x1b1/0xa30 kernel/events/ring_buffer.c:271
 __perf_event_output kernel/events/core.c:7790 [inline]
 perf_event_output_forward+0x15c/0x280 kernel/events/core.c:7808
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9501
 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10033
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10007
 perf_trace_preemptirq_template+0x2be/0x380 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 8d 26 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900000077a0 EFLAGS: 00000206
RAX: a8035f3b51b50f00 RBX: 1ffff92000000ef8 RCX: a8035f3b51b50f00
RDX: dffffc0000000000 RSI: ffffffff8a0b11c0 RDI: ffffffff8a59ab80
RBP: ffffc90000007880 R08: dffffc0000000000 R09: fffffbfff1ff7439
R10: fffffbfff1ff7439 R11: 1ffffffff1ff7438 R12: ffffffff8c120400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 ndisc_send_skb+0xdc4/0x14a0 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3962
 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:preempt_count mm/memcontrol.c:2915 [inline]
RIP: 0010:active_memcg mm/memcontrol.c:941 [inline]
RIP: 0010:memcg_kmem_bypass mm/memcontrol.c:1000 [inline]
RIP: 0010:get_obj_cgroup_from_current+0x0/0x2f0 mm/memcontrol.c:2919
Code: 07 80 c1 03 38 c1 0f 8c 55 ff ff ff 4c 89 e7 e8 a6 87 fb ff e9 48 ff ff ff 48 89 df 48 c7 c6 20 f3 15 8a e8 32 8f e9 ff 0f 0b <41> 57 41 56 53 65 8b 05 4c bb 40 7e a9 00 01 ff 00 74 12 65 48 8b
RSP: 0018:ffffc9000115fc20 EFLAGS: 00000202
RAX: ffff8880169e98c0 RBX: ffffc9000115fc58 RCX: 0000000000000000
RDX: ffff88807c7a3b80 RSI: 00000000000001d0 RDI: ffffffff8c1f1e20
RBP: 0000000000000dc0 R08: dffffc0000000000 R09: fffffbfff1ad2f76
R10: fffffbfff1ad2f76 R11: 1ffffffff1ad2f75 R12: ffff888029c25780
R13: ffff888076796758 R14: ffff8880169e98c0 R15: 0000000000000001
 memcg_slab_pre_alloc_hook mm/slab.h:283 [inline]
 slab_pre_alloc_hook+0x7e/0xc0 mm/slab.h:497
 slab_alloc_node mm/slub.c:3134 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x3d/0x290 mm/slub.c:3233
 kmem_cache_zalloc include/linux/slab.h:725 [inline]
 __alloc_file+0x25/0x240 fs/file_table.c:132
 alloc_empty_file+0x90/0x180 fs/file_table.c:181
 alloc_file+0x5b/0x4f0 fs/file_table.c:223
 alloc_file_pseudo+0x17a/0x1f0 fs/file_table.c:263
 sock_alloc_file+0xb3/0x240 net/socket.c:462
 __sys_socketpair+0x2cc/0x540 net/socket.c:1666
 __do_sys_socketpair net/socket.c:1695 [inline]
 __se_sys_socketpair net/socket.c:1692 [inline]
 __x64_sys_socketpair+0x97/0xb0 net/socket.c:1692
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f65dd179929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f65dafe1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f65dd3a0fa0 RCX: 00007f65dd179929
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001
RBP: 00007f65dd1fbb39 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f65dd3a0fa0 R15: 00007ffd8b81d738
 </TASK>