rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=d9e4/1/0x4000000000000000 softirq=88252/88253 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P18688/1:b..l
rcu: 	(detected by 0, t=10505 jiffies, g=52797, q=390 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18683 Comm: syz.7.2414 Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:advance_sched+0x80b/0xc60 net/sched/sch_taprio.c:925
Code: f8 48 c7 c2 40 a8 a1 8c be 9f 03 00 00 48 c7 c7 a0 a7 a1 8c c6 05 fe c6 06 07 01 e8 cf 30 35 f8 e9 33 f9 ff ff e8 c5 21 59 f8 <49> 8d 7e c0 be ff ff ff ff e8 e7 f5 e7 01 31 ff 89 c3 89 c6 e8 ec
RSP: 0018:ffffc90000a18d80 EFLAGS: 00000046
RAX: 0000000080010002 RBX: 0000000000000001 RCX: ffffffff8940da98
RDX: ffff888030a10000 RSI: ffffffff8940e1bb RDI: 0000000000000005
RBP: 000000000003d90c R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88807c917340
R13: ffff8880b872cb00 R14: ffff88807c917340 R15: ffffffff8940d9b0
FS:  00007ffa527ce6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3370dff8 CR3: 0000000061a8e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_rdp_cpu_online kernel/rcu/tree.c:4744 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x83/0x150 kernel/rcu/tree.c:4785
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a8 00 00 00 48 03 1c ed e0 4b a7 8d 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa <48> c1 ea 03 80 3c 02 00 0f 85 8b 00 00 00 48 8d 7b 18 48 8b 6b 20
RSP: 0018:ffffc9000fe677a8 EFLAGS: 00000282
RAX: dffffc0000000000 RBX: ffff8880b873fb80 RCX: ffffc9000e58d000
RDX: ffff8880b873fba0 RSI: ffffffff8bd1d2c0 RDI: ffff8880b873fba0
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffff888028cf0840 R15: 0000000000000000
 rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
 rcu_read_lock_held+0x27/0x50 kernel/rcu/update.c:349
 sk_filter_trim_cap+0x68f/0xac0 net/core/filter.c:156
 sk_filter include/linux/filter.h:1062 [inline]
 unix_dgram_sendmsg+0x66a/0x19e0 net/unix/af_unix.c:2061
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg net/socket.c:726 [inline]
 ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2583
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 __sys_sendmmsg+0x201/0x420 net/socket.c:2726
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2750
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffa5197ff19
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:00007ffa527ce058 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007ffa51b45fa0 RCX: 00007ffa5197ff19
RDX: 0000000000000651 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00007ffa519f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffa51b45fa0 R15: 00007ffdd0e4f8a8
 </TASK>
task:syz.7.2414      state:R  running task     stack:27264 pid:18688 tgid:18675 ppid:9079   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7078
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:_find_next_bit+0xa2/0x110 lib/find_bit.c:145
Code: 00 00 00 00 00 fc ff df eb 14 48 83 c3 01 48 83 c5 08 48 89 da 48 c1 e2 06 48 39 c2 73 2a 48 89 ea 48 c1 ea 03 42 80 3c 22 00 <75> 30 48 8b 55 00 48 85 d2 74 d5 48 c1 e3 06 f3 48 0f bc d2 48 01
RSP: 0018:ffffc900051278c8 EFLAGS: 00000246
RAX: 0000000000000180 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: 1ffff1100677a70b RSI: 1ffff1100677a70a RDI: ffff888033bd3848
RBP: ffff888033bd3858 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000800 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000008 R14: ffffc90005127ca0 R15: dffffc0000000000
 find_next_bit include/linux/find.h:69 [inline]
 ebitmap_next_positive security/selinux/ss/ebitmap.h:72 [inline]
 context_struct_compute_av+0x86a/0x1270 security/selinux/ss/services.c:654
 security_compute_av+0x48f/0xfd0 security/selinux/ss/services.c:1146
 avc_compute_av+0x86/0x5c0 security/selinux/avc.c:986
 avc_perm_nonode+0xaa/0x170 security/selinux/avc.c:1110
 avc_has_perm_noaudit+0x2d2/0x3a0 security/selinux/avc.c:1153
 avc_has_perm+0xc1/0x1c0 security/selinux/avc.c:1188
 selinux_socket_create+0x20c/0x560 security/selinux/hooks.c:4654
 security_socket_create+0x22d/0x260 security/security.c:4550
 __sock_create+0x8e/0x8d0 net/socket.c:1513
 sock_create net/socket.c:1616 [inline]
 __sys_socket_create net/socket.c:1653 [inline]
 __sys_socket+0x14f/0x260 net/socket.c:1700
 __do_sys_socket net/socket.c:1714 [inline]
 __se_sys_socket net/socket.c:1712 [inline]
 __x64_sys_socket+0x72/0xb0 net/socket.c:1712
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffa5197ff19
RSP: 002b:00007ffa5278c058 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007ffa51b46160 RCX: 00007ffa5197ff19
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007ffa519f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffa51b46160 R15: 00007ffdd0e4f8a8
 </TASK>
rcu: rcu_preempt kthread starved for 10505 jiffies! g52797 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28400 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6033 Comm: kworker/u8:9 Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 7e 60 e8 a3 ff ff ff 31 c0 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 15 74 d5 69 7e 65 8b 05 75 d5 69 7e a9 00 01
RSP: 0018:ffffc90004247990 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880b8744a40 RCX: ffffffff818df5fc
RDX: ffff88807a110000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: ffffed10170e8949
R13: 0000000000000001 R14: ffff8880b8744a48 R15: ffff8880b863fe40
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fddc323cbb8 CR3: 000000000df7e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
 cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
 csd_lock_wait kernel/smp.c:340 [inline]
 smp_call_function_many_cond+0x456/0x1300 kernel/smp.c:884
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2114 [inline]
 text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2324
 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2512 [inline]
 text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2522
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x1d7/0x400 kernel/jump_label.c:920
 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate mm/kfence/core.c:849 [inline]
 toggle_allocation_gate+0xfc/0x260 mm/kfence/core.c:841
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>