RBP: 00007f6ac5e13256 R08: 0000000000000000 R09: 00007ffe86a02977 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 00007ffe86a02b70 R14: 00007f6ac6b14620 R15: 0000000000000003 watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz-executor:25120] Modules linked in: irq event stamp: 28575247 hardirqs last enabled at (28575246): [] ___slab_alloc+0x815/0x1ae0 mm/slub.c:4542 hardirqs last disabled at (28575247): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (28573634): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (28573634): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:650 softirqs last disabled at (28573637): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (28573637): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (28573637): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 25120 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:unwind_next_frame+0xd4f/0x20a0 arch/x86/kernel/unwind_orc.c:590 Code: 03 4c 8b 44 24 28 80 3c 16 00 0f 85 d3 0e 00 00 48 8b 14 24 49 89 45 48 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 c6 12 00 00 4c 89 e2 4d 89 75 38 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc90000a07be0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffffff911c8a2c RDX: 1ffff92000140f91 RSI: 1ffff92000140f93 RDI: ffffc90000a07d78 RBP: ffffc90000a07c98 R08: ffffffff911c8a30 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000000a845 R12: ffffc90000a07ca0 R13: ffffc90000a07c50 R14: ffffc90000a07d80 R15: ffffc90000a07c84 FS: 000055558e7c4500(0000) GS:ffff888124adb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c1dff8 CR3: 0000000076337000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] ref_tracker_alloc+0x18e/0x5b0 lib/ref_tracker.c:271 __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline] netdev_hold include/linux/netdevice.h:4404 [inline] dst_init+0xda/0x580 net/core/dst.c:52 dst_alloc+0xbb/0x1a0 net/core/dst.c:93 rt_dst_alloc+0x35/0x3a0 net/ipv4/route.c:1646 __mkroute_output net/ipv4/route.c:2650 [inline] ip_route_output_key_hash_rcu+0x87a/0x28e0 net/ipv4/route.c:2870 ip_route_output_key_hash+0x10f/0x2b0 net/ipv4/route.c:2700 __ip_route_output_key include/net/route.h:169 [inline] ip_route_output_flow+0x27/0x150 net/ipv4/route.c:2927 ip_route_output_key include/net/route.h:179 [inline] ip_route_me_harder+0x560/0x1370 net/ipv4/netfilter.c:53 synproxy_send_tcp.isra.0+0x352/0x6a0 net/netfilter/nf_synproxy_core.c:431 synproxy_send_client_synack+0x6f6/0x8f0 net/netfilter/nf_synproxy_core.c:484 nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline] nft_synproxy_do_eval+0xa63/0xd80 net/netfilter/nft_synproxy.c:141 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline] nft_do_chain+0x2e9/0x1920 net/netfilter/nf_tables_core.c:285 nft_do_chain_inet+0x18a/0x340 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xbe/0x200 net/netfilter/core.c:623 nf_hook.constprop.0+0x424/0x750 include/linux/netfilter.h:273 NF_HOOK include/linux/netfilter.h:316 [inline] ip_local_deliver+0x169/0x1f0 net/ipv4/ip_input.c:260 dst_input include/net/dst.h:474 [inline] ip_rcv_finish net/ipv4/ip_input.c:453 [inline] NF_HOOK include/linux/netfilter.h:318 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] ip_rcv+0x2e0/0x600 net/ipv4/ip_input.c:573 __netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:6079 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6192 process_backlog+0x439/0x15e0 net/core/dev.c:6544 __napi_poll.constprop.0+0xba/0x550 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x97f/0xef0 net/core/dev.c:7784 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_single+0x1fb/0x6b0 kernel/smp.c:687 Code: 24 ce 00 00 00 48 89 de e8 82 fa ff ff 41 89 c5 0f 1f 44 00 00 e8 65 f8 0b 00 eb 07 e8 5e f8 0b 00 f3 90 8b 9c 24 c8 00 00 00 <31> ff 83 e3 01 89 de e8 89 f3 0b 00 85 db 75 e2 e8 40 f8 0b 00 e8 RSP: 0018:ffffc90003c9f600 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000011 RCX: ffffffff81b15187 RDX: ffff88802b978000 RSI: ffffffff81b15172 RDI: 0000000000000005 RBP: ffffc90003c9f760 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff92000793ec8 R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000 rcu_barrier kernel/rcu/tree.c:3872 [inline] rcu_barrier+0x28d/0x6e0 kernel/rcu/tree.c:3809 netdev_run_todo+0x2e9/0x1320 net/core/dev.c:11565 nsim_destroy+0x212/0x800 drivers/net/netdevsim/netdev.c:1185 __nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1473 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1485 [inline] nsim_dev_reload_destroy+0x10a/0x4d0 drivers/net/netdevsim/dev.c:1707 nsim_drv_remove+0x52/0x1d0 drivers/net/netdevsim/dev.c:1722 device_remove+0xcb/0x170 drivers/base/dd.c:569 __device_release_driver drivers/base/dd.c:1274 [inline] device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1297 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3878 device_unregister+0x1d/0xc0 drivers/base/core.c:3919 nsim_bus_dev_del drivers/net/netdevsim/bus.c:483 [inline] del_device_store+0x355/0x4a0 drivers/net/netdevsim/bus.c:244 bus_attr_store+0x74/0xb0 drivers/base/bus.c:172 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142 kernfs_fop_write_iter+0x3af/0x570 fs/kernfs/file.c:352 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x7d3/0x11d0 fs/read_write.c:686 ksys_write+0x12a/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6ac5d8da7f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48 RSP: 002b:00007ffe86a02b20 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f6ac5d8da7f RDX: 0000000000000001 RSI: 00007ffe86a02b70 RDI: 0000000000000005 RBP: 00007f6ac5e13256 R08: 0000000000000000 R09: 00007ffe86a02977 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 00007ffe86a02b70 R14: 00007f6ac6b14620 R15: 0000000000000003 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 25393 Comm: syz.8.7626 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: e9 ed 27 5c 00 be 03 00 00 00 5b e9 72 35 ed 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 38 06 e7 11 65 8b 05 49 06 e7 11 a9 00 01 ff 00 74 1d RSP: 0018:ffffc90000007e10 EFLAGS: 00000002 RAX: 0000000000010001 RBX: ffff8880b8427e80 RCX: ffffffff81a9ae0f RDX: ffff8880260b9e40 RSI: ffffffff81a9abc6 RDI: 0000000000000001 RBP: ffff888028fca340 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff9adc7c40 R12: 0000000000000001 R13: 0000000000000000 R14: ffff888028fca340 R15: 0000000000000001 FS: 0000555581ec3500(0000) GS:ffff8881249db000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d521ff8 CR3: 0000000031a2a000 CR4: 0000000000350ef0 Call Trace: enqueue_hrtimer+0x96/0x3b0 kernel/time/hrtimer.c:1082 __run_hrtimer kernel/time/hrtimer.c:1794 [inline] __hrtimer_run_queues+0x8ff/0xad0 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:92 [inline] RIP: 0010:syscall_enter_from_user_mode include/linux/entry-common.h:125 [inline] RIP: 0010:do_syscall_64+0x9a/0xfa0 arch/x86/entry/syscall_64.c:90 Code: 00 48 8b 7d 08 e8 d6 71 00 00 0f 1f 44 00 00 0f 1f 44 00 00 90 e8 26 e9 60 f6 90 90 e8 8f ea 60 f6 fb 65 48 8b 05 1e ef 3f 08 <48> 8b 50 08 f6 c2 3f 0f 85 1b 03 00 00 90 90 41 81 fc d5 01 00 00 RSP: 0018:ffffc9000c167f18 EFLAGS: 00000202 RAX: ffff8880260b9e40 RBX: ffffc9000c167f48 RCX: ffffffff81c54a7f RDX: 0000000000000000 RSI: ffffffff8db02224 RDI: ffffffff8bf1e4c0 RBP: ffffc9000c167f38 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90834bd7 R11: 0000000000000000 R12: 00000000000000ca R13: 00000000000000ca R14: 0000000000000000 R15: 0000000000000000 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa0b978efc9 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:00007ffc162c4f28 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000149bdf RCX: 00007fa0b978efc9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa0b99e5fac RBP: 0000000000000032 R08: 00007fa0ba6c0000 R09: 00000003162c521f R10: 00007ffc162c5020 R11: 0000000000000246 R12: 00007fa0b99e5fac R13: 00007ffc162c5020 R14: 0000000000149c11 R15: 00007ffc162c5040