rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P21699/1:b..l rcu: (detected by 0, t=10502 jiffies, g=150297, q=796 ncpus=1) task:syz.5.5612 state:R running task stack:27800 pid:21699 tgid:21698 ppid:13688 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x125c/0x6730 kernel/sched/core.c:7234 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7556 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x205/0xa00 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:23 [inline] RIP: 0010:lock_acquire+0x4a/0x370 kernel/locking/lockdep.c:5831 Code: 65 4c 8b 3d a0 4b 7d 12 4c 89 7c 24 30 4d 89 cf 66 90 65 8b 05 bb 4b 7d 12 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 46 11 3c 0f <0f> 82 ac 02 00 00 8b 35 0e 45 3c 0f 85 f6 0f 85 c7 00 00 00 48 8b RSP: 0018:ffffc90004537200 EFLAGS: 00000297 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ebe8200 RBP: ffffffff8ebe8200 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000200 R11: 000000000009aac4 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:300 [inline] rcu_read_lock include/linux/rcupdate.h:840 [inline] class_rcu_constructor include/linux/rcupdate.h:1183 [inline] unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x162/0x1e0 mm/page_owner.c:165 __reset_page_owner+0x84/0x190 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4584 [inline] slab_alloc_node mm/slub.c:4917 [inline] __kmalloc_cache_noprof+0x265/0x6c0 mm/slub.c:5485 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] ref_tracker_alloc+0x190/0x590 lib/ref_tracker.c:270 __netdev_tracker_alloc include/linux/netdevice.h:4499 [inline] netdev_hold include/linux/netdevice.h:4528 [inline] j1939_session_new+0x243/0x650 net/can/j1939/transport.c:1530 j1939_tp_send+0x211/0x880 net/can/j1939/transport.c:2061 j1939_sk_send_loop net/can/j1939/socket.c:1172 [inline] j1939_sk_sendmsg+0xb35/0x1440 net/can/j1939/socket.c:1295 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2684 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2738 __sys_sendmmsg+0x20c/0x440 net/socket.c:2827 __do_sys_sendmmsg net/socket.c:2854 [inline] __se_sys_sendmmsg net/socket.c:2851 [inline] __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2851 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f971459e0d9 RSP: 002b:00007f9715545028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f9714825fa0 RCX: 00007f971459e0d9 RDX: 03fffffffffffe3d RSI: 0000200000003e40 RDI: 0000000000000003 RBP: 00007f9714635024 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000000f5 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9714826038 R14: 00007f9714825fa0 R15: 00007fff37b5e778