rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=ad3/1/0x4000000000000000 softirq=20308/20308 fqs=0 (detected by 1, t=10502 jiffies, g=27165, q=568) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8003 Comm: syz-executor.4 Not tainted 5.15.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:lock_is_held_type+0x3/0x180 kernel/locking/lockdep.c:5651 Code: 48 c7 c7 20 28 8b 8a 48 c7 c6 60 28 8b 8a e8 24 15 2e f7 0f 0b eb bf e8 ab fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 RSP: 0018:ffffc90000007ca8 EFLAGS: 00000002 RAX: 0000000000010001 RBX: 0000000000000001 RCX: ffff88801d209dc0 RDX: ffff88801d209dc0 RSI: 00000000ffffffff RDI: ffff888077f4a300 RBP: ffff888077f4a2e8 R08: ffffffff886c3f67 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff888077f4a000 R13: ffff888077f4a340 R14: dffffc0000000000 R15: ffff88801d20a898 FS: 00007f8174fd66c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c124000 CR3: 0000000064329000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:287 [inline] advance_sched+0x69/0x940 net/sched/sch_taprio.c:717 __run_hrtimer kernel/time/hrtimer.c:1686 [inline] __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_is_held_type+0x137/0x180 Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90002e67ad8 EFLAGS: 00000206 RAX: 53cd52e708725f00 RBX: ffffffff8daeab18 RCX: ffff88801d209dc0 RDX: 0000000000000000 RSI: ffffffff8a8b3c20 RDI: ffffffff8ad8f6c0 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1bc8cce R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246 R13: ffff88801d209dc0 R14: 00000000ffffffff R15: ffffffff8c91fa60 lock_is_held include/linux/lockdep.h:287 [inline] ___might_sleep+0xf1/0x6a0 kernel/sched/core.c:9592 might_alloc include/linux/sched/mm.h:209 [inline] slab_pre_alloc_hook+0x44/0xc0 mm/slab.h:492 slab_alloc_node mm/slub.c:3134 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x3f/0x280 mm/slub.c:3233 sk_prot_alloc+0x58/0x200 net/core/sock.c:1857 sk_alloc+0x35/0x310 net/core/sock.c:1916 inet6_create+0x617/0xf30 net/ipv6/af_inet6.c:191 __sock_create+0x460/0x8d0 net/socket.c:1486 sock_create net/socket.c:1537 [inline] __sys_socket+0x132/0x370 net/socket.c:1579 __do_sys_socket net/socket.c:1588 [inline] __se_sys_socket net/socket.c:1586 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1586 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f817645cf69 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:00007f8174fd60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f8176593f80 RCX: 00007f817645cf69 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000000000a RBP: 00007f81764ba6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8176593f80 R15: 00007ffc20a499f8 rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g27165 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=0 timer-softirq=13018 rcu: rcu_preempt kthread starved for 10502 jiffies! g27165 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26752 pid: 15 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 schedule+0x11b/0x1f0 kernel/sched/core.c:6459 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8003 Comm: syz-executor.4 Not tainted 5.15.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:do_raw_spin_lock+0x2c/0x370 kernel/locking/spinlock_debug.c:113 Code: 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 49 89 fc 65 48 8b 04 25 28 00 00 00 48 89 84 24 80 00 00 00 <48> ba 00 00 00 00 00 fc ff df 48 c7 44 24 40 b3 8a b5 41 48 c7 44 RSP: 0018:ffffc90000007b40 EFLAGS: 00000082 RAX: 53cd52e708725f00 RBX: 1ffff92000000f88 RCX: ffffffff81636502 RDX: dffffc0000000000 RSI: ffffffff8a8b3c20 RDI: ffffffff915b6530 RBP: ffffc90000007c10 R08: dffffc0000000000 R09: fffffbfff1f7f019 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff915b6530 R13: 1ffff92000000f84 R14: ffffffff915b6530 R15: dffffc0000000000 FS: 00007f8174fd66c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c124000 CR3: 0000000064329000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0xdd/0x120 kernel/locking/spinlock.c:162 debug_object_activate+0x63/0x4e0 lib/debugobjects.c:693 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline] debug_activate kernel/time/hrtimer.c:475 [inline] enqueue_hrtimer+0x30/0x390 kernel/time/hrtimer.c:1084 __run_hrtimer kernel/time/hrtimer.c:1703 [inline] __hrtimer_run_queues+0x6b6/0xcf0 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_is_held_type+0x137/0x180 Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90002e67ad8 EFLAGS: 00000206 RAX: 53cd52e708725f00 RBX: ffffffff8daeab18 RCX: ffff88801d209dc0 RDX: 0000000000000000 RSI: ffffffff8a8b3c20 RDI: ffffffff8ad8f6c0 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1bc8cce R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246 R13: ffff88801d209dc0 R14: 00000000ffffffff R15: ffffffff8c91fa60 lock_is_held include/linux/lockdep.h:287 [inline] ___might_sleep+0xf1/0x6a0 kernel/sched/core.c:9592 might_alloc include/linux/sched/mm.h:209 [inline] slab_pre_alloc_hook+0x44/0xc0 mm/slab.h:492 slab_alloc_node mm/slub.c:3134 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x3f/0x280 mm/slub.c:3233 sk_prot_alloc+0x58/0x200 net/core/sock.c:1857 sk_alloc+0x35/0x310 net/core/sock.c:1916 inet6_create+0x617/0xf30 net/ipv6/af_inet6.c:191 __sock_create+0x460/0x8d0 net/socket.c:1486 sock_create net/socket.c:1537 [inline] __sys_socket+0x132/0x370 net/socket.c:1579 __do_sys_socket net/socket.c:1588 [inline] __se_sys_socket net/socket.c:1586 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1586 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f817645cf69 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:00007f8174fd60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f8176593f80 RCX: 00007f817645cf69 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000000000a RBP: 00007f81764ba6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8176593f80 R15: 00007ffc20a499f8