protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (5628 ticks this GP) idle=012/1/0x4000000000000002 softirq=235643/235643 fqs=4810 rcu: (t=10502 jiffies g=293657 q=2428) NMI backtrace for cpu 0 CPU: 0 PID: 25434 Comm: syz-executor.4 Not tainted 5.0.0+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1223 print_cpu_stall kernel/rcu/tree.c:1360 [inline] check_cpu_stall kernel/rcu/tree.c:1434 [inline] rcu_pending kernel/rcu/tree.c:3103 [inline] rcu_sched_clock_irq.cold+0x500/0xa4a kernel/rcu/tree.c:2544 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:PageMappingFlags include/linux/page-flags.h:425 [inline] RIP: 0010:free_pages_prepare mm/page_alloc.c:1056 [inline] RIP: 0010:free_pcp_prepare mm/page_alloc.c:1086 [inline] RIP: 0010:free_unref_page_prepare mm/page_alloc.c:2831 [inline] RIP: 0010:free_unref_page+0x8c/0x600 mm/page_alloc.c:2880 Code: 89 c0 48 0f a3 05 e4 56 cf 07 0f 82 a9 03 00 00 4d 8d 7c 24 18 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 97 04 00 00 41 f6 44 24 18 03 74 09 49 c7 44 24 18 00 00 00 RSP: 0018:ffff88804e0ef8a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000034264 RCX: ffff888097730f40 RDX: 1ffffd400108886b RSI: ffffffff889a5140 RDI: 0000000000000282 RBP: ffff88804e0ef8c8 R08: ffff8880977306c0 R09: ffffed1015d05bd8 R10: ffffed1015d05bd7 R11: ffff8880ae82debb R12: ffffea0008444340 R13: 000000000021110d R14: 0000000000000000 R15: ffffea0008444358 free_the_page mm/page_alloc.c:4607 [inline] __free_pages mm/page_alloc.c:4615 [inline] __free_pages+0x72/0xb0 mm/page_alloc.c:4612 relay_destroy_buf+0x12d/0x360 kernel/relay.c:215 relay_open_buf.part.0+0x839/0xb60 kernel/relay.c:481 relay_open_buf kernel/relay.c:449 [inline] relay_open kernel/relay.c:599 [inline] relay_open+0x523/0x980 kernel/relay.c:563 do_blk_trace_setup+0x414/0xb90 kernel/trace/blktrace.c:532 __blk_trace_setup+0xe3/0x190 kernel/trace/blktrace.c:577 blk_trace_setup+0x4f/0x70 kernel/trace/blktrace.c:595 sg_ioctl+0x369/0x2a00 drivers/scsi/sg.c:1117 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457f29 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6421c8fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457f29 RDX: 0000000020000000 RSI: 00000000c0481273 RDI: 000000000000000e RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6421c906d4 R13: 00000000004bf3d1 R14: 00000000004d0e10 R15: 00000000ffffffff