watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.4564:20463] Modules linked in: irq event stamp: 10790169 hardirqs last enabled at (10790168): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (10790169): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (10296580): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10296580): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10296580): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10296583): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10296583): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10296583): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 20463 Comm: syz.2.4564 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__cant_migrate+0x4/0x2e0 kernel/sched/core.c:8835 Code: 41 89 d5 e8 0e aa 8f 00 44 89 ea 44 89 f6 eb a2 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 RSP: 0018:ffffc90000006358 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc9000ef59000 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 00000000000002bf RDI: ffffffff8d9e7e73 RBP: ffffc90000006458 R08: ffffc900000063ef R09: 0000000000000000 R10: ffffc900000063e0 R11: fffff52000000c7e R12: 0000000000000001 R13: ffff88802d65ba18 R14: ffff88802d65ba28 R15: 0000000000000001 FS: 00007fb3317f66c0(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efcdfb83ef8 CR3: 0000000029b9e000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __bpf_prog_run include/linux/filter.h:703 [inline] bpf_prog_run include/linux/filter.h:725 [inline] bpf_prog_run_array include/linux/bpf.h:2235 [inline] trace_call_bpf+0x2e6/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4745 tcp_rcv_established+0x13c9/0x1de0 net/ipv4/tcp_input.c:6289 tcp_v4_do_rcv+0xa23/0xce0 net/ipv4/tcp_ipv4.c:1925 tcp_v4_rcv+0x2676/0x2f00 net/ipv4/tcp_ipv4.c:2363 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2fb/0x580 net/ipv4/ip_input.c:233 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:317 dst_input include/net/dst.h:469 [inline] ip_sublist_rcv_finish+0x21d/0x2a0 net/ipv4/ip_input.c:579 ip_list_rcv_finish net/ipv4/ip_input.c:628 [inline] ip_sublist_rcv+0x6e7/0x9b0 net/ipv4/ip_input.c:636 ip_list_rcv+0x3e2/0x430 net/ipv4/ip_input.c:670 __netif_receive_skb_list_ptype net/core/dev.c:6020 [inline] __netif_receive_skb_list_core+0x571/0x800 net/core/dev.c:6057 __netif_receive_skb_list net/core/dev.c:6119 [inline] netif_receive_skb_list_internal+0x975/0xcc0 net/core/dev.c:6210 gro_normal_list include/net/gro.h:532 [inline] gro_normal_one include/net/gro.h:546 [inline] gro_skb_finish net/core/gro.c:601 [inline] gro_receive_skb+0x642/0xce0 net/core/gro.c:631 napi_gro_receive include/linux/netdevice.h:4159 [inline] virtnet_receive_done+0xd1f/0x1af0 drivers/net/virtio_net.c:2557 receive_buf+0xa0e/0x15e0 drivers/net/virtio_net.c:2601 virtnet_receive_packets drivers/net/virtio_net.c:2949 [inline] virtnet_receive drivers/net/virtio_net.c:2973 [inline] virtnet_poll+0x1fde/0x2da0 drivers/net/virtio_net.c:3068 __napi_poll+0xc7/0x480 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_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 9b 93 01 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc9000bdbef98 EFLAGS: 00000206 RAX: e2794ff68a037400 RBX: 0000000000000000 RCX: e2794ff68a037400 RDX: 0000000000000000 RSI: ffffffff8db83c98 RDI: ffffffff8be28c00 RBP: ffffffff8172aae5 R08: 0000000000000000 R09: ffffffff8172aae5 R10: ffffc9000bdbeda0 R11: ffffffffa0204c4c R12: 0000000000000002 R13: ffffffff8e13f0e0 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3094 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3214 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x16fd/0x4d00 kernel/sched/core.c:6786 preempt_schedule_notrace+0xd1/0x110 kernel/sched/core.c:7059 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:482 [inline] __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x347/0x360 kernel/locking/lockdep.c:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline] percpu_ref_put+0x35/0x180 include/linux/percpu-refcount.h:351 css_put include/linux/cgroup_refcnt.h:79 [inline] obj_cgroup_charge_pages+0x6e/0xa0 mm/memcontrol.c:2808 obj_cgroup_charge_account+0xcf/0x660 mm/memcontrol.c:3104 __memcg_slab_post_alloc_hook+0x3e6/0x7f0 mm/memcontrol.c:3190 memcg_slab_post_alloc_hook mm/slub.c:2180 [inline] slab_post_alloc_hook mm/slub.c:4158 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_lru_noprof+0x2c7/0x3d0 mm/slub.c:4216 __d_alloc+0x31/0x6f0 fs/dcache.c:1690 d_alloc_pseudo+0x1f/0xb0 fs/dcache.c:1821 alloc_path_pseudo fs/file_table.c:360 [inline] alloc_file_pseudo+0xcc/0x210 fs/file_table.c:376 __anon_inode_getfile fs/anon_inodes.c:166 [inline] anon_inode_getfile+0xc5/0x1a0 fs/anon_inodes.c:204 __do_sys_perf_event_open kernel/events/core.c:13631 [inline] __se_sys_perf_event_open+0xf20/0x1d70 kernel/events/core.c:13333 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: 0033:0x7fb33398e9a9 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:00007fb3317f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fb333bb6080 RCX: 00007fb33398e9a9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100 RBP: 00007fb333a10d69 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb333bb6080 R15: 00007ffcd6aff9e8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 20454 Comm: syz.5.4562 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x9f/0x2c0 mm/kasan/generic.c:189 Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 de 01 00 00 49 ff c3 48 ff c3 75 ee e9 21 01 00 00 44 89 dd RSP: 0018:ffffc90000a080c0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: fffffffffffffffe RCX: ffffffff819d8c57 RDX: 0000000000000001 RSI: 0000000000000012 RDI: ffffe8ffffda20d8 RBP: ffffc90000a08220 R08: ffffe8ffffda20e9 R09: 1ffffd1ffffb441d R10: dffffc0000000000 R11: fffff91ffffb441c R12: 0000000000000003 R13: 0000000000000013 R14: fffff91ffffb441e R15: 1ffffd1ffffb441b FS: 00007fc2e5db36c0(0000) GS:ffff888125d23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efce06e56c0 CR3: 000000006cb16000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x2c7/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5834 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 hrtimer_interrupt+0xfa/0xaa0 kernel/time/hrtimer.c:1868 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_trace_run_bpf_submit+0x12f/0x170 kernel/events/core.c:10898 Code: 08 d0 9f 92 0f b6 cb 48 8d 1c 08 48 81 c3 2c 14 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 75 30 fe 0b 48 83 c4 10 5b 41 5c <41> 5d 41 5e 41 5f 5d e9 d5 a3 81 09 cc 44 89 e9 80 e1 07 80 c1 03 RSP: 0018:ffffc90000a085a8 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffffe8ffffda0010 RCX: 0000000000000001 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff81cb5957 R10: dffffc0000000000 R11: fffff91ffffb4005 R12: ffffe8ffffda0025 R13: ffffffff8e00e120 R14: ffff8880b8732a08 R15: 0000000000000000 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 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 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4359 kmalloc_noprof include/linux/slab.h:905 [inline] slab_free_hook mm/slub.c:2333 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x166/0x400 mm/slub.c:4745 blk_update_request+0x5eb/0xe70 block/blk-mq.c:987 scsi_end_request+0x7c/0x830 drivers/scsi/scsi_lib.c:637 scsi_io_completion+0x131/0x390 drivers/scsi/scsi_lib.c:1078 blk_complete_reqs block/blk-mq.c:1224 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1229 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_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:246 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x11/0x90 kernel/kcov.c:314 Code: 09 cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 14 25 08 d0 9f 92 <65> 8b 0d e8 a2 df 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 RSP: 0018:ffffc9000bd07098 EFLAGS: 00000246 RAX: ffffffff81cb5d69 RBX: 0000000000000001 RCX: ffff88807d050000 RDX: ffff88807d050000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000bd07198 R08: ffffc9000bd0712f R09: 0000000000000000 R10: ffffc9000bd07120 R11: ffffffffa0204c4c R12: 00000000000002e5 R13: 1ffff920017a0e20 R14: ffffffff81cb5957 R15: 0000000000000001 rcu_read_unlock include/linux/rcupdate.h:869 [inline] trace_call_bpf+0x4c9/0x850 kernel/trace/bpf_trace.c:148 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5834 _raw_spin_lock_nested+0x32/0x50 kernel/locking/spinlock.c:378 copy_pte_range mm/memory.c:1131 [inline] copy_pmd_range+0x6bf/0x7000 mm/memory.c:1267 copy_pud_range mm/memory.c:1304 [inline] copy_p4d_range mm/memory.c:1328 [inline] copy_page_range+0xc46/0x1270 mm/memory.c:1416 dup_mmap+0xf57/0x1ac0 mm/mmap.c:1838 dup_mm kernel/fork.c:1477 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1529 copy_process+0x16d3/0x3b80 kernel/fork.c:2169 kernel_clone+0x21e/0x870 kernel/fork.c:2599 __do_sys_clone kernel/fork.c:2742 [inline] __se_sys_clone kernel/fork.c:2726 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726 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: 0033:0x7fc2e4f8e9a9 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:00007fc2e5db2fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fc2e51b5fa0 RCX: 00007fc2e4f8e9a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020800000 RBP: 00007fc2e5010d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc2e51b5fa0 R15: 00007ffc34e52d68