bridge0: port 1(bridge_slave_0) entered forwarding state watchdog: BUG: soft lockup - CPU#0 stuck for 164s! [syz.3.27:6006] Modules linked in: irq event stamp: 11930019 hardirqs last enabled at (11930018): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (11930019): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (11913422): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11913422): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11913422): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11913425): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11913425): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11913425): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6006 Comm: syz.3.27 Not tainted 6.15.0-syzkaller-g3713b584dabb #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:lock_release+0xd/0x3e0 kernel/locking/lockdep.c:5879 Code: ff ff 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 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 <53> 48 83 ec 30 49 89 f5 49 89 fe 65 48 8b 05 60 7a fe 10 48 89 44 RSP: 0018:ffffc90000007130 EFLAGS: 00000246 RAX: ffffffff81cb88eb RBX: 0000000000000001 RCX: ffff88802c133c00 RDX: 0000000000000100 RSI: ffffffff81cb84c7 RDI: ffffffff8e13f060 RBP: ffffc90000007258 R08: ffffc900000071ef R09: 0000000000000000 R10: ffffc900000071e0 R11: ffffffffa02019d0 R12: 00000000000002e5 R13: 1ffff92000000e38 R14: ffffffff81cb84c7 R15: 0000000000000001 FS: 00007f93985b96c0(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c1eff8 CR3: 0000000032ab2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] trace_call_bpf+0x5a9/0x850 kernel/trace/bpf_trace.c:148 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10866 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5882 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_mempool_unpoison_object+0xa0/0x170 mm/kasan/common.c:547 kasan_mempool_unpoison_object include/linux/kasan.h:388 [inline] napi_skb_cache_put+0x429/0x730 net/core/skbuff.c:1430 __free_old_xmit+0x2c7/0x650 drivers/net/virtio_net.c:-1 virtnet_free_old_xmit drivers/net/virtio_net.c:610 [inline] free_old_xmit drivers/net/virtio_net.c:1045 [inline] virtnet_poll_tx+0x42b/0x1560 drivers/net/virtio_net.c:3196 __napi_poll+0xc4/0x480 net/core/dev.c:7414 napi_poll net/core/dev.c:7478 [inline] net_rx_action+0x707/0xe30 net/core/dev.c:7605 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7108 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 4b ab 29 f6 e8 26 c3 60 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000ba27900 EFLAGS: 00000286 RAX: 782b1a43a050f000 RBX: 0000000000000000 RCX: 782b1a43a050f000 RDX: 0000000000000006 RSI: ffffffff8d97cf77 RDI: 0000000000000001 RBP: ffffc9000ba279b0 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001744f20 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_trace_init+0x96/0x2d0 kernel/trace/trace_event_perf.c:223 Code: 5a 00 48 8b 1d 8b 7c 50 0c 48 81 fb c0 30 1a 8e 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 30 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 17 01 00 00 4d 63 24 24 4c 89 ff 4c 89 e6 e8 43 af f6 RSP: 0018:ffffc9000ba27a78 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffffff8f3ed2e0 RCX: 0000000000080000 RDX: ffffc90005013000 RSI: 0000000000000a1c RDI: 0000000000000a1d RBP: 0000000000000002 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: ffffffff8f3ed310 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000156 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10807 perf_try_init_event+0x17f/0x870 kernel/events/core.c:12529 perf_init_event kernel/events/core.c:12627 [inline] perf_event_alloc+0x1357/0x2bb0 kernel/events/core.c:12902 __do_sys_perf_event_open kernel/events/core.c:13420 [inline] __se_sys_perf_event_open+0x772/0x1d70 kernel/events/core.c:13301 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f939778e929 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:00007f93985b9038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f93979b5fa0 RCX: 00007f939778e929 RDX: fffffbffffffffff RSI: 0000000000000000 RDI: 0000200000000500 RBP: 00007f9397810b39 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f93979b5fa0 R15: 00007ffe3d944ed8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 18 Comm: rcu_exp_gp_kthr Not tainted 6.15.0-syzkaller-g3713b584dabb #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 89 fb e8 23 00 00 00 48 8b 3d e4 d2 f9 0b 48 89 de 5b e9 03 0c 59 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 c0 9c 92 65 8b 15 c8 5e RSP: 0018:ffffc90000177148 EFLAGS: 00000293 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88801d291e00 RDX: 0000000000000000 RSI: 0000000000000018 RDI: 0000000000000029 RBP: ffffffff8b8b8142 R08: ffff88801d291e00 R09: 0000000000000008 R10: 0000000000000007 R11: 0000000000000000 R12: ffffc90000177240 R13: ffffc90000177320 R14: ffffc90000177240 R15: ffffc90000177208 FS: 0000000000000000(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c1dff8 CR3: 0000000073164000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vsnprintf+0x9ef/0xf00 lib/vsprintf.c:2861 snprintf+0xda/0x120 lib/vsprintf.c:2968 print_caller kernel/printk/printk.c:1390 [inline] info_print_prefix+0x1e1/0x310 kernel/printk/printk.c:1409 record_print_text+0x154/0x430 kernel/printk/printk.c:1456 printk_get_next_message+0x26d/0x7b0 kernel/printk/printk.c:3024 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x4ca/0xc40 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xc4/0x270 kernel/printk/printk.c:3325 vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450 _printk+0xcf/0x120 kernel/printk/printk.c:2475 synchronize_rcu_expedited_stall+0x61/0x1170 kernel/rcu/tree_exp.h:570 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:668 [inline] rcu_exp_wait_wake kernel/rcu/tree_exp.h:687 [inline] rcu_exp_sel_wait_wake+0x7a1/0xd40 kernel/rcu/tree_exp.h:721 kthread_worker_fn+0x504/0xb60 kernel/kthread.c:1010 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245