rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=c634/1/0x4000000000000000 softirq=58697/58697 fqs=1
rcu: 	(detected by 1, t=10502 jiffies, g=56709, q=212 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17168 Comm: syz-executor Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:taprio_set_budgets+0x234/0x370 net/sched/sch_taprio.c:664
Code: 00 4c 89 f7 be 04 00 00 00 e8 d8 7c 31 f8 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 31 41 89 2e <4c> 39 64 24 20 0f 84 e8 00 00 00 e8 fc bc c9 f7 49 83 c5 08 48 83
RSP: 0018:ffffc90000007c10 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888025214800 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888025214884
RBP: 000000007fffffff R08: ffff888025214887 R09: 1ffff11004a42910
R10: dffffc0000000000 R11: ffffed1004a42911 R12: 0000000000000004
R13: ffff888025214808 R14: ffff888025214884 R15: 0000000000000001
FS:  0000555561f31500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3793ad CR3: 000000006cfd8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 advance_sched+0x98d/0xca0 net/sched/sch_taprio.c:977
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:unwind_next_frame+0x111/0x22d0 arch/x86/kernel/unwind_orc.c:494
Code: 0f b6 04 20 84 c0 0f 85 c7 19 00 00 f6 03 03 0f 85 35 18 00 00 48 89 6c 24 50 49 8d 6d 35 48 89 e8 48 c1 e8 03 48 89 44 24 28 <42> 0f b6 04 20 84 c0 0f 85 b8 19 00 00 4c 0f be 7d 00 48 8b 44 24
RSP: 0018:ffffc90004c5f2d0 EFLAGS: 00000a03
RAX: 1ffff9200098be7a RBX: 0000000000000000 RCX: ffffffff8bd37600
RDX: dffffc0000000000 RSI: ffffffff898fc8ff RDI: ffffffff81421930
RBP: ffffc90004c5f3d5 R08: 000000000000000a R09: ffffc90004c5f490
R10: ffffc90004c5f3f0 R11: ffffffff81819f40 R12: dffffc0000000000
R13: ffffc90004c5f3a0 R14: ffffffff898fc8ff R15: 0000000000000000
 arch_stack_walk+0x11c/0x150 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
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4283 [inline]
 __kmalloc_node_track_caller_noprof+0x28b/0x4c0 mm/slub.c:4302
 kvasprintf+0xdf/0x190 lib/kasprintf.c:25
 kasprintf+0xd5/0x120 lib/kasprintf.c:59
 wq_init_lockdep kernel/workqueue.c:4789 [inline]
 alloc_workqueue+0x121/0x210 kernel/workqueue.c:5777
 tipc_crypto_start+0xd2/0x620 net/tipc/crypto.c:1472
 tipc_init_net+0x211/0x330 net/tipc/core.c:72
 ops_init+0x31e/0x590 net/core/net_namespace.c:138
 setup_net+0x287/0x9e0 net/core/net_namespace.c:362
 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:500
 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
 ksys_unshare+0x57d/0xa70 kernel/fork.c:3314
 __do_sys_unshare kernel/fork.c:3385 [inline]
 __se_sys_unshare kernel/fork.c:3383 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3383
 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: 0033:0x7ff927180017
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffd25853078 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ff927335f40 RCX: 00007ff927180017
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007ff927336738 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g56709 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:26072 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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: 1 UID: 0 PID: 17187 Comm: syz.0.3035 Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f3/0x2ca0 kernel/smp.c:884
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 36 ea 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 e1 e5 0b 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 c5 e5
RSP: 0018:ffffc9000b6df600 EFLAGS: 00000246
RAX: ffffffff8189f70b RBX: 1ffff110170c8c65 RCX: 0000000000080000
RDX: ffffc9000d21a000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000b6df800 R08: ffffffff8189f6da R09: 1ffffffff285d310
R10: dffffc0000000000 R11: fffffbfff285d311 R12: dffffc0000000000
R13: ffff8880b8646328 R14: ffff8880b873f940 R15: 0000000000000000
FS:  00007f8fed93f6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c26a197 CR3: 00000000653f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 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+0x352/0xb30 arch/x86/kernel/alternative.c:2324
 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2522
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_slow_inc_cpuslocked+0x80/0xf0 kernel/jump_label.c:168
 static_key_slow_inc+0x1a/0x30 kernel/jump_label.c:191
 tcp_md5_do_add+0x228/0x3c0 net/ipv4/tcp_ipv4.c:1420
 tcp_v6_parse_md5_keys+0x629/0x8b0
 do_tcp_setsockopt+0x1194/0x2540 net/ipv4/tcp.c:3950
 do_sock_setsockopt+0x3af/0x720 net/socket.c:2313
 __sys_setsockopt net/socket.c:2338 [inline]
 __do_sys_setsockopt net/socket.c:2344 [inline]
 __se_sys_setsockopt net/socket.c:2341 [inline]
 __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2341
 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: 0033:0x7f8fecb7e819
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:00007f8fed93f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f8fecd35fa0 RCX: 00007f8fecb7e819
RDX: 000000000000000e RSI: 0000000000000006 RDI: 0000000000000007
RBP: 00007f8fecbf175e R08: 00000000000000d8 R09: 0000000000000000
R10: 0000000020000240 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8fecd35fa0 R15: 00007ffdb02fc9b8
 </TASK>