rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P15151/1:b..l rcu: (detected by 0, t=10504 jiffies, g=113641, q=419623 ncpus=2) task:syz-executor state:R running task stack:22536 pid:15151 tgid:15151 ppid:15134 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1821/0x5740 kernel/sched/core.c:7189 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x760 kernel/entry/common.c:164 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_release+0x7f/0x3c0 kernel/locking/lockdep.c:5881 Code: 56 19 8f 0e 00 0f 84 1c 02 00 00 65 8b 05 39 cf 97 11 85 c0 0f 85 0d 02 00 00 65 4c 8b 3d 81 89 97 11 41 83 bf 8c 0b 00 00 00 <0f> 85 f7 01 00 00 49 81 3e 80 43 fd 93 0f 84 ea 01 00 00 9c 5b fa RSP: 0018:ffffc90004a1f3f0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff914b0401 RCX: 0000000080000001 RDX: ffffc90004a1f501 RSI: ffffffff8c28b640 RDI: ffffffff8c28b600 RBP: dffffc0000000000 R08: ffffc90004a1fe90 R09: 0000000000000000 R10: ffffc90004a1f578 R11: fffff52000943eb1 R12: ffffc90004a1fea0 R13: ffffffff8176f256 R14: ffffffff8e95cca0 R15: ffff888036b51ec0 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] class_rcu_destructor include/linux/rcupdate.h:1181 [inline] unwind_next_frame+0x1bba/0x2550 arch/x86/kernel/unwind_orc.c:709 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 save_stack+0x122/0x230 mm/page_owner.c:165 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943 __slab_free+0x274/0x2c0 mm/slub.c:5612 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4569 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kvmalloc_node_noprof+0x4d7/0x8a0 mm/slub.c:6832 xt_jumpstack_alloc net/netfilter/x_tables.c:1449 [inline] do_replace_table+0x191/0x620 net/netfilter/x_tables.c:1486 xt_replace_table+0x2c/0x140 net/netfilter/x_tables.c:1545 __do_replace+0x167/0x9a0 net/ipv6/netfilter/ip6_tables.c:1081 do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline] do_ip6t_set_ctl+0xb4e/0xe10 net/ipv6/netfilter/ip6_tables.c:1644 nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101 do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2381 __sys_setsockopt net/socket.c:2406 [inline] __do_sys_setsockopt net/socket.c:2412 [inline] __se_sys_setsockopt net/socket.c:2409 [inline] __x64_sys_setsockopt+0x13d/0x1b0 net/socket.c:2409 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f36a0b9e69a RSP: 002b:00007f36a0f3f6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f36a0f3f740 RCX: 00007f36a0b9e69a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00000000000002e8 R09: 0000000000000000 R10: 00007f36a0dea2a0 R11: 0000000000000206 R12: 00007f36a0dea240 R13: 00007f36a0f3f6dc R14: 0000000000000000 R15: 00007f36a0deafc0