bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state WARNING: can't dereference registers at 1ffff11017480f90 for ip apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 FAT-fs (loop4): Unrecognized mount option "" or missing value Dev loop0: unable to read RDB block 1 loop0: unable to read partition table loop0: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop0 () failed (rc=-5) ================================================================== BUG: KASAN: stack-out-of-bounds in deref_stack_regs arch/x86/kernel/unwind_orc.c:304 [inline] BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:437 Read of size 8 at addr ffff8880ba407ce8 by task syz-executor.3/9908 CPU: 0 PID: 9908 Comm: syz-executor.3 Not tainted 4.14.289-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430 deref_stack_regs arch/x86/kernel/unwind_orc.c:304 [inline] unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:437 perf_callchain_kernel+0x38c/0x520 arch/x86/events/core.c:2344 get_perf_callchain+0x2de/0x740 kernel/events/callchain.c:217 perf_callchain+0x147/0x190 kernel/events/callchain.c:190 perf_prepare_sample+0xc9a/0x1370 kernel/events/core.c:6166 __perf_event_output kernel/events/core.c:6282 [inline] perf_event_output_forward+0xc9/0x1f0 kernel/events/core.c:6300 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7549 perf_swevent_overflow kernel/events/core.c:7625 [inline] perf_swevent_event+0x3c8/0x460 kernel/events/core.c:7663 perf_tp_event+0x540/0x6e0 kernel/events/core.c:8087 perf_trace_run_bpf_submit+0x119/0x200 kernel/events/core.c:8057 perf_trace_lock+0x2d6/0x490 include/trace/events/lock.h:39 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x4df/0x870 kernel/locking/lockdep.c:4016 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x1b/0xe0 kernel/locking/spinlock.c:192 __debug_check_no_obj_freed lib/debugobjects.c:760 [inline] debug_check_no_obj_freed+0x2c0/0x680 lib/debugobjects.c:776 kmem_cache_free+0x156/0x2b0 mm/slab.c:3757 __rcu_reclaim kernel/rcu/rcu.h:195 [inline] rcu_do_batch kernel/rcu/tree.c:2699 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:kfree+0x15d/0x250 mm/slab.c:3816 RSP: 0018:ffff888056707728 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: 0000000000000286 RCX: 1ffff110144d3537 RDX: 0000000000000000 RSI: ffff8880a269a998 RDI: 0000000000000286 RBP: ffff8880ab68b540 R08: ffff8880ba430c00 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88813fe74940 R13: ffffffff85bf03d6 R14: ffff8880ab68b630 R15: ffff8880ae996880 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x5f6/0x820 net/core/skbuff.c:583 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] consume_skb+0xe0/0x380 net/core/skbuff.c:714 netlink_broadcast_filtered+0x2ae/0x9e0 net/netlink/af_netlink.c:1498 kobject_uevent_env+0x9c8/0xf30 lib/kobject_uevent.c:496 rx_queue_add_kobject net/core/net-sysfs.c:931 [inline] net_rx_queue_update_kobjects+0xcc/0x3f0 net/core/net-sysfs.c:953 register_queue_kobjects net/core/net-sysfs.c:1420 [inline] netdev_register_kobject+0x26f/0x410 net/core/net-sysfs.c:1631 register_netdevice+0x955/0xe50 net/core/dev.c:7668 register_netdev+0x17/0x30 net/core/dev.c:7813 sit_init_net+0x2cf/0x820 net/ipv6/sit.c:1846 ops_init+0xaa/0x3e0 net/core/net_namespace.c:118 setup_net+0x22f/0x530 net/core/net_namespace.c:298 copy_net_ns+0x19b/0x440 net/core/net_namespace.c:422 create_new_namespaces+0x375/0x720 kernel/nsproxy.c:107 copy_namespaces+0x27b/0x310 kernel/nsproxy.c:165 copy_process.part.0+0x25f8/0x71c0 kernel/fork.c:1794 copy_process kernel/fork.c:1606 [inline] _do_fork+0x184/0xc80 kernel/fork.c:2092 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f66cadfc209 RSP: 002b:00007f66c9771118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f66caf0ef60 RCX: 00007f66cadfc209 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000004008c600 RBP: 00007f66cae56161 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffc0805184f R14: 00007f66c9771300 R15: 0000000000022000 The buggy address belongs to the page: page:ffffea0002e901c0 count:1 mapcount:0 mapping: (null) index:0x0 flags: 0xfff00000000800(reserved) raw: 00fff00000000800 0000000000000000 0000000000000000 00000001ffffffff raw: ffffea0002e901e0 ffffea0002e901e0 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880ba407b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880ba407c00: 00 f1 f1 f1 f1 f1 f1 04 f2 00 f3 f3 f3 00 00 00 >ffff8880ba407c80: 00 00 00 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 ^ ffff8880ba407d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880ba407d80: 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 ==================================================================