rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2680 jiffies s: 59393 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: 31135 Comm: syz.2.12222 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:irqentry_enter+0x36/0x50 kernel/entry/common.c:386 Code: ff ff ff eb 22 65 48 8b 05 d7 23 eb 75 0f b6 58 2c 48 8b 7c 24 08 e8 19 f9 ff ff f6 c3 02 75 0b 66 90 e8 6d e2 6f f7 31 c0 5b e8 64 09 00 00 e8 5f e2 6f f7 b0 01 5b c3 66 2e 0f 1f 84 00 00 RSP: 0018:ffffc900000078f8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffc90000007918 RCX: 939532a5b9070700 RDX: 0000000000000000 RSI: ffffffff8adefa80 RDI: ffffffff8adefa40 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c3ee4e R10: fffffbfff1c3ee4e R11: 1ffffffff1c3ee4d R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fa6d75fe6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002e507000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sysvec_irq_work+0xa/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728 RIP: 0010:rcu_read_unlock_special+0x84/0x500 kernel/rcu/tree_plugin.h:685 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 2d 97 96 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc900000079c0 EFLAGS: 00000206 RAX: 939532a5b9070700 RBX: 1ffff92000000f40 RCX: 939532a5b9070700 RDX: dffffc0000000000 RSI: ffffffff8a8c0300 RDI: ffffffff8adefaa0 RBP: ffffc90000007ac0 R08: dffffc0000000000 R09: ffffed10171c6afa R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] process_backlog+0x3ff/0x6e0 net/core/dev.c:6024 __napi_poll+0xc0/0x460 net/core/dev.c:6590 napi_poll net/core/dev.c:6657 [inline] net_rx_action+0x5b1/0xad0 net/core/dev.c:6771 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194 Code: 74 05 e8 be d1 65 f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 66 5b 36 f7 65 8b 05 67 14 e1 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc90003bb7b20 EFLAGS: 00000206 RAX: 939532a5b9070700 RBX: 0000000000000a02 RCX: 939532a5b9070700 RDX: dffffc0000000000 RSI: ffffffff8a8c0300 RDI: 0000000000000001 RBP: ffffc90003bb7ba0 R08: dffffc0000000000 R09: ffffed10171c6afa R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: dffffc0000000000 R13: ffff8880590c0000 R14: ffffffff96ec9f30 R15: 1ffff92000776f64 __debug_check_no_obj_freed lib/debugobjects.c:988 [inline] debug_check_no_obj_freed+0x515/0x530 lib/debugobjects.c:1009 free_pages_prepare mm/page_alloc.c:1465 [inline] __free_pages_ok+0x358/0xc40 mm/page_alloc.c:1715 free_large_kmalloc+0xfd/0x190 mm/slab_common.c:913 sk_prot_free net/core/sock.c:2086 [inline] __sk_destruct+0x49c/0x630 net/core/sock.c:2172 sock_put include/net/sock.h:2036 [inline] isotp_release+0x788/0x930 net/can/isotp.c:1201 __sock_release net/socket.c:654 [inline] sock_release+0x7b/0x140 net/socket.c:682 __sys_socketpair+0x4fb/0x540 net/socket.c:-1 __do_sys_socketpair net/socket.c:1786 [inline] __se_sys_socketpair net/socket.c:1783 [inline] __x64_sys_socketpair+0x97/0xb0 net/socket.c:1783 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fa6d7f8eba9 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:00007fa6d75fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007fa6d81d5fa0 RCX: 00007fa6d7f8eba9 RDX: 0000000000000006 RSI: 0000000000000002 RDI: 000000000000001d RBP: 00007fa6d8011e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000300 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa6d81d6038 R14: 00007fa6d81d5fa0 R15: 00007ffed6b3fd98