rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (0 ticks this GP) idle=ab4c/1/0x4000000000000000 softirq=36545/36545 fqs=5235 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12190 (detected by 1, t=10502 jiffies, g=54077, q=3191 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 12190 Comm: syz.5.1922 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__lock_release kernel/locking/lockdep.c:5444 [inline] RIP: 0010:lock_release+0x17d/0x920 kernel/locking/lockdep.c:5810 Code: 00 00 00 48 8b 84 24 a0 00 00 00 48 89 44 24 50 43 c6 44 2f 08 f8 fa 48 c7 c7 80 26 8c 8a e8 6a 6a cf 08 65 ff 05 a3 f4 9d 7e 44 24 5c 01 00 00 00 48 c7 c0 e4 06 01 8f 48 c1 e8 03 42 0f b6 RSP: 0018:ffffc900000079e0 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff888020bd0adc RCX: dada7013dd8a4200 RDX: 0000000000000000 RSI: ffffffff8a8c2680 RDI: ffffffff8adf71a0 RBP: ffffc90000007af0 R08: ffffffff8f00d22f R09: 1ffffffff1e01a45 R10: dffffc0000000000 R11: fffffbfff1e01a46 R12: 0000000000120000 R13: dffffc0000000000 R14: ffff888020bd0000 R15: 1ffff92000000f48 FS: 00007ff50372f6c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fed36e26080 CR3: 000000005fc71000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release include/linux/rcupdate.h:355 [inline] rcu_read_unlock include/linux/rcupdate.h:824 [inline] trace_call_bpf+0x5ca/0x6b0 kernel/trace/bpf_trace.c:137 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10037 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728 RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:319 [inline] RIP: 0010:handle_softirqs+0x1b7/0x910 kernel/softirq.c:584 Code: 89 7c 24 2c 0f b7 db 48 c7 c7 80 0f 8b 8a e8 90 ae e4 08 65 66 c7 05 46 61 b4 7e 00 00 e8 71 6e 39 00 fb 49 c7 c5 c0 a0 60 8d <89> 5c 24 34 b8 ff ff ff ff 0f bc 44 24 34 41 89 c6 41 ff c6 0f 84 RSP: 0018:ffffc90000007e20 EFLAGS: 00000282 RAX: dada7013dd8a4200 RBX: 0000000000000200 RCX: dada7013dd8a4200 RDX: dffffc0000000000 RSI: ffffffff8a8c19a0 RDI: ffffffff8adf71a0 RBP: ffffc90000007f30 R08: ffffffff919342ef R09: 1ffffffff232685d R10: dffffc0000000000 R11: fffffbfff232685e R12: dffffc0000000000 R13: ffffffff8d60a0c0 R14: ffff888020bd0000 R15: 000000000000000a __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 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:__rcu_read_unlock+0x36/0xd0 kernel/rcu/tree_plugin.h:425 Code: 00 00 00 00 fc ff df 65 48 8b 3d f5 69 95 7e 48 8d 9f 3c 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d <4c> 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 RSP: 0018:ffffc9000d527750 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888020bd043c RCX: 0000000000080000 RDX: ffffc9001baf3000 RSI: 00000000000003be RDI: ffff888020bd0000 RBP: ffffc9000d5278a8 R08: ffff88801b24815b R09: 1ffff1100364902b R10: dffffc0000000000 R11: ffffed100364902c R12: 1ffff1100417a087 R13: dffffc0000000000 R14: 000000000000000a R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:823 [inline] __rhashtable_insert_fast include/linux/rhashtable.h:795 [inline] rhashtable_lookup_insert_key include/linux/rhashtable.h:958 [inline] __netlink_insert net/netlink/af_netlink.c:507 [inline] netlink_insert+0xf18/0x13b0 net/netlink/af_netlink.c:568 netlink_autobind+0x22d/0x300 net/netlink/af_netlink.c:829 netlink_sendmsg+0x51d/0xbd0 net/netlink/af_netlink.c:1840 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5ed/0x9a0 net/socket.c:2519 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2573 __sys_sendmsg net/socket.c:2602 [inline] __do_sys_sendmsg net/socket.c:2611 [inline] __se_sys_sendmsg+0x1c3/0x2b0 net/socket.c:2609 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff50279e1d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff50372f028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff502a26090 RCX: 00007ff50279e1d9 RDX: 0000000000000000 RSI: 0000200000000080 RDI: 000000000000000d RBP: 00007ff502835888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff502a26128 R14: 00007ff502a26090 R15: 00007ffe7e45ba68 task:syz.5.1922 state:R running task stack:24432 pid:12190 ppid:5018 flags:0x0000400c Call Trace: