watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.2.293:6987] Modules linked in: irq event stamp: 11753261 hardirqs last enabled at (11753260): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11753261): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (10749048): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10749048): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10749048): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10749051): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10749051): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10749051): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6987 Comm: syz.2.293 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:in_irqentry_text kernel/stacktrace.c:379 [inline] RIP: 0010:filter_irq_stacks+0x40/0xa0 kernel/stacktrace.c:397 Code: f4 31 db 49 bd 00 00 00 00 00 fc ff df 49 89 ff 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 84 fd 74 00 49 8b 04 de <48> 3d 30 02 00 81 0f 93 c1 48 3d 70 16 00 81 0f 92 c2 84 d1 75 27 RSP: 0018:ffffc90000007360 EFLAGS: 00000246 RAX: ffffffff8b55ae83 RBX: 000000000000000f RCX: 0000000000000001 RDX: 0000000000002900 RSI: 0000000000000025 RDI: ffffc90000007400 RBP: ffffc90000007630 R08: ffffc90000006fef R09: 0000000000000000 R10: ffffc90000006fe0 R11: ffffffffa0000958 R12: 0000000000000025 R13: dffffc0000000000 R14: ffffc90000007400 R15: ffffc90000007478 FS: 00007fc14361c6c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f108eee56c0 CR3: 000000005f198000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: stack_depot_save_flags+0x40/0x910 lib/stackdepot.c:610 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x4f/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:4372 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] ref_tracker_alloc+0x133/0x460 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4331 [inline] netdev_hold include/linux/netdevice.h:4360 [inline] dst_init+0xd9/0x450 net/core/dst.c:52 dst_alloc+0x12a/0x170 net/core/dst.c:93 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x420 net/ipv6/route.c:3315 ndisc_send_skb+0x41f/0x1400 net/ipv6/ndisc.c:493 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4038 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 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:schedule_debug kernel/sched/core.c:5948 [inline] RIP: 0010:__schedule+0x1a7/0x4cd0 kernel/sched/core.c:6666 Code: 74 08 48 89 df e8 49 0e cb f6 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 30 0e cb f6 48 81 3b 9d 6e ac 57 <0f> 85 10 18 00 00 83 7c 24 68 00 7f 42 49 8d 5e 18 48 89 d8 48 c1 RSP: 0018:ffffc90003307340 EFLAGS: 00000246 RAX: 1ffff92000660000 RBX: ffffc90003300000 RCX: 1c0735f682d66500 RDX: 0000000000000000 RSI: ffffffff8bc1cdc0 RDI: ffffffff8bc1cd80 RBP: ffffc90003307550 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: ffff8880b883a640 R13: dffffc0000000000 R14: ffff88802e2c9e00 R15: ffff8881260cc000 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:put_cpu_partial+0x1b4/0x250 mm/slub.c:3273 Code: 85 b5 00 00 00 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 d8 39 3e 09 f7 c5 00 02 00 00 74 bc fb 4d 85 e4 <75> bb eb c4 90 e8 a2 62 9d 02 85 c0 74 22 83 3d 7b 64 67 0d 00 75 RSP: 0018:ffffc900033076d0 EFLAGS: 00000246 RAX: 1c0735f682d66500 RBX: ffff888141eba8c0 RCX: 1c0735f682d66500 RDX: 0000000000000007 RSI: ffffffff8d749f78 RDI: ffffffff8bc1cde0 RBP: 0000000000000282 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: ffff88802e2c9e00 R15: ffff8880b8841990 __slab_free+0x2f7/0x400 mm/slub.c:4526 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] __kmalloc_cache_node_noprof+0x1c0/0x3d0 mm/slub.c:4380 kmalloc_node_noprof include/linux/slab.h:928 [inline] __get_vm_area_node+0x131/0x2d0 mm/vmalloc.c:3127 __vmalloc_node_range_noprof+0x2f1/0x12c0 mm/vmalloc.c:3804 __vmalloc_node_noprof mm/vmalloc.c:3907 [inline] __vmalloc_noprof+0x7a/0x90 mm/vmalloc.c:3921 bpf_prog_alloc_no_stats+0x4a/0x4e0 kernel/bpf/core.c:104 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:146 bpf_prog_load+0x735/0x1930 kernel/bpf/syscall.c:2881 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc14278e969 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:00007fc14361c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc1429b6080 RCX: 00007fc14278e969 RDX: 0000000000000094 RSI: 0000200000000140 RDI: 0000000000000005 RBP: 00007fc142810ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc1429b6080 R15: 00007ffdd6cd0728 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:perf_trace_lock+0x31b/0x3b0 include/trace/events/lock.h:50 Code: 24 18 e8 88 f8 51 00 48 83 c4 10 4c 8b 64 24 20 48 c7 44 24 40 0e 36 e0 45 4b c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 <65> 48 8b 05 dd db d7 10 48 3b 84 24 a0 00 00 00 75 28 48 8d 65 d8 RSP: 0018:ffffc90000a086e0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffffff8d96dc18 RCX: ffff88801e29bc00 RDX: 0000000000010000 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: ffffc90000a087c8 R08: ffffc90000a088cf R09: 0000000000000000 R10: ffffc90000a088c0 R11: ffffffffa0000958 R12: 1ffff920001410e4 R13: 000000000000000d R14: 000000000000002c R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f35dd31b060 CR3: 000000002e12e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __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:5877 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:10788 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:5877 seqcount_lockdep_reader_access+0xde/0x1c0 include/linux/seqlock.h:73 get_jiffies_update+0x44/0x140 kernel/time/tick-sched.c:873 tmigr_requires_handle_remote+0x127/0x480 kernel/time/timer_migration.c:1166 run_local_timers kernel/time/timer.c:2497 [inline] update_process_times+0x1ae/0x2f0 kernel/time/timer.c:2514 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x39a/0x520 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x58f/0x7a0 kernel/printk/printk.c:2449 Code: 85 32 01 00 00 e8 41 f3 1e 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 30 f3 1e 00 eb 06 e8 29 f3 1e 00 fb 48 c7 c7 80 fa f2 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 f9 3f RSP: 0018:ffffc90000a87b80 EFLAGS: 00000293 RAX: ffffffff81a0cba7 RBX: ffffffff81a0ca64 RCX: ffff88801e29bc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8df2fa80 RBP: ffffc90000a87c90 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: dffffc0000000000 R13: 1ffff92000150f74 R14: 0000000000000200 R15: 000000000000003d _printk+0xcf/0x120 kernel/printk/printk.c:2475 check_hung_task kernel/hung_task.c:181 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:265 [inline] watchdog+0xb4f/0x1030 kernel/hung_task.c:437 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245