New replicast peer: 172.20.20.187 Enabled bearer , priority 10 Enabling of bearer rejected, already enabled kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 18329 Comm: syz-executor.1 Not tainted 5.0.0+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:924 [inline] RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:960 Code: 0f b6 35 67 8d 4a 03 31 ff 44 89 f6 e8 66 58 61 fb 45 84 f6 0f 84 b3 00 00 00 e8 18 57 61 fb 49 8d 7f 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 64 01 00 00 48 89 f8 4d 8b 77 70 48 c1 e8 03 80 RSP: 0018:ffff88809705ee78 EFLAGS: 00010206 RAX: 000000000000004d RBX: dffffc0000000000 RCX: ffffffff860e8e39 RDX: 0000000000000000 RSI: ffffffff860e8d68 RDI: 0000000000000268 RBP: ffff88809705eed0 R08: ffff888030ff2180 R09: ffffed1012d4e456 R10: ffffed1012d4e455 R11: ffff888096a722af R12: 0000000000000000 R13: ffff888096a72280 R14: 0000000000000001 R15: 00000000000001f8 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000013f9fd0 CR3: 00000000a922c000 CR4: 00000000001406e0 Call Trace: fib6_del_route net/ipv6/ip6_fib.c:1813 [inline] fib6_del+0xac2/0x10a0 net/ipv6/ip6_fib.c:1844 fib6_clean_node+0x3a8/0x590 net/ipv6/ip6_fib.c:2006 fib6_walk_continue+0x4b3/0x8e0 net/ipv6/ip6_fib.c:1928 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1976 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2055 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2071 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2082 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4051 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4056 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3705 addrconf_notify+0x5e1/0x2280 net/ipv6/addrconf.c:3630 notifier_call_chain+0xc7/0x240 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1739 call_netdevice_notifiers_extack net/core/dev.c:1751 [inline] call_netdevice_notifiers net/core/dev.c:1765 [inline] dev_close_many+0x33f/0x6f0 net/core/dev.c:1508 rollback_registered_many+0x43b/0xfd0 net/core/dev.c:8161 rollback_registered+0x109/0x1d0 net/core/dev.c:8226 unregister_netdevice_queue net/core/dev.c:9273 [inline] unregister_netdevice_queue+0x1ee/0x2c0 net/core/dev.c:9266 unregister_netdevice include/linux/netdevice.h:2655 [inline] __tun_detach+0xd5b/0x1000 drivers/net/tun.c:727 tun_detach drivers/net/tun.c:744 [inline] tun_chr_close+0xe0/0x180 drivers/net/tun.c:3435 __fput+0x2df/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x92c/0x2fd0 kernel/exit.c:875 do_group_exit+0x135/0x370 kernel/exit.c:979 get_signal+0x399/0x1d50 kernel/signal.c:2575 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_32_irqs_on arch/x86/entry/common.c:341 [inline] do_fast_syscall_32+0xa9d/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fb4869 Code: Bad RIP value. RSP: 002b:00000000f5db012c EFLAGS: 00000292 ORIG_RAX: 00000000000000f0 RAX: fffffffffffffe00 RBX: 000000000814af68 RCX: 0000000000000080 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000814af6c RBP: 00000000f5db0228 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 383218f6c303a364 ]--- RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:924 [inline] RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:960 Code: 0f b6 35 67 8d 4a 03 31 ff 44 89 f6 e8 66 58 61 fb 45 84 f6 0f 84 b3 00 00 00 e8 18 57 61 fb 49 8d 7f 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 64 01 00 00 48 89 f8 4d 8b 77 70 48 c1 e8 03 80 RSP: 0018:ffff88809705ee78 EFLAGS: 00010206 RAX: 000000000000004d RBX: dffffc0000000000 RCX: ffffffff860e8e39 RDX: 0000000000000000 RSI: ffffffff860e8d68 RDI: 0000000000000268 RBP: ffff88809705eed0 R08: ffff888030ff2180 R09: ffffed1012d4e456 R10: ffffed1012d4e455 R11: ffff888096a722af R12: 0000000000000000 R13: ffff888096a72280 R14: 0000000000000001 R15: 00000000000001f8 kobject: 'loop4' (000000001aac6cb9): kobject_uevent_env FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 kobject: 'loop4' (000000001aac6cb9): fill_kobj_path: path = '/devices/virtual/block/loop4' CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7fb483f CR3: 0000000008871000 CR4: 00000000001406e0