device sit0 left promiscuous mode 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: 7069 Comm: syz-executor.2 Not tainted 5.2.0-rc2+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:194 [inline] RIP: 0010:__fib6_drop_pcpu_from net/ipv6/ip6_fib.c:904 [inline] RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:925 [inline] RIP: 0010:fib6_purge_rt+0x1a0/0x800 net/ipv6/ip6_fib.c:933 Code: c1 ea 03 42 80 3c 32 00 0f 85 43 05 00 00 4c 8b 38 4d 85 ff 0f 84 5c ff ff ff e8 fb c0 4c fb 49 8d 7f 70 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 79 05 00 00 49 8b 57 70 49 39 d5 0f 85 34 ff RSP: 0018:ffff888086d87020 EFLAGS: 00010202 RAX: 0000000000040000 RBX: ffff88808f042300 RCX: ffffc9000a1fb000 RDX: 000000000000000e RSI: ffffffff8623e4c5 RDI: 0000000000000071 RBP: ffff888086d87088 R08: ffff88808c77e000 R09: ffffed1010db0deb R10: ffffed1010db0dea R11: 0000000000000003 R12: 0000000000000001 R13: ffff888090dbe580 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007f0140951700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 000000008df34000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fib6_del_route net/ipv6/ip6_fib.c:1821 [inline] fib6_del+0x9bd/0xeb0 net/ipv6/ip6_fib.c:1852 fib6_clean_node+0x3a5/0x590 net/ipv6/ip6_fib.c:2014 fib6_walk_continue+0x4a9/0x8e0 net/ipv6/ip6_fib.c:1936 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1984 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2063 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2079 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2090 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4347 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4352 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3711 addrconf_notify+0x5db/0x2370 net/ipv6/addrconf.c:3636 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95 __raw_notifier_call_chain kernel/notifier.c:396 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1753 call_netdevice_notifiers_extack net/core/dev.c:1765 [inline] call_netdevice_notifiers net/core/dev.c:1779 [inline] __dev_notify_flags+0x1e9/0x2c0 net/core/dev.c:7594 dev_change_flags+0x10d/0x170 net/core/dev.c:7630 devinet_ioctl+0x1434/0x1cd0 net/ipv4/devinet.c:1133 inet_ioctl+0x1f4/0x340 net/ipv4/af_inet.c:952 sock_do_ioctl+0xd8/0x2f0 net/socket.c:1049 sock_ioctl+0x3ed/0x780 net/socket.c:1200 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd5f/0x1380 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+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0140950c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459279 RDX: 0000000020000640 RSI: 0000000000008914 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01409516d4 R13: 00000000004c4c76 R14: 00000000004d89f8 R15: 00000000ffffffff Modules linked in: ---[ end trace 47e3555e6d9f4b35 ]--- RIP: 0010:__read_once_size include/linux/compiler.h:194 [inline] RIP: 0010:__fib6_drop_pcpu_from net/ipv6/ip6_fib.c:904 [inline] RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:925 [inline] RIP: 0010:fib6_purge_rt+0x1a0/0x800 net/ipv6/ip6_fib.c:933 Code: c1 ea 03 42 80 3c 32 00 0f 85 43 05 00 00 4c 8b 38 4d 85 ff 0f 84 5c ff ff ff e8 fb c0 4c fb 49 8d 7f 70 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 79 05 00 00 49 8b 57 70 49 39 d5 0f 85 34 ff RSP: 0018:ffff888086d87020 EFLAGS: 00010202 RAX: 0000000000040000 RBX: ffff88808f042300 RCX: ffffc9000a1fb000 RDX: 000000000000000e RSI: ffffffff8623e4c5 RDI: 0000000000000071 RBP: ffff888086d87088 R08: ffff88808c77e000 R09: ffffed1010db0deb R10: ffffed1010db0dea R11: 0000000000000003 R12: 0000000000000001 R13: ffff888090dbe580 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007f0140951700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 000000008df34000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400