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: 0 PID: 22296 Comm: syz-executor.2 Not tainted 5.0.0+ #98 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 0c 6e 45 03 31 ff 44 89 f6 e8 d6 7d 5b fb 45 84 f6 0f 84 b3 00 00 00 e8 88 7c 5b 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:ffff88804004efa8 EFLAGS: 00010207 RAX: 0000000000000014 RBX: dffffc0000000000 RCX: ffffc900061b6000 RDX: 0000000000040000 RSI: ffffffff8614e7a8 RDI: 00000000000000a7 RBP: ffff88804004f000 R08: ffff88806192c500 R09: ffffed101509e0de R10: ffffed101509e0dd R11: ffff8880a84f06ef R12: 0000000000000000 R13: ffff8880a84f06c0 R14: 0000000000000001 R15: 0000000000000037 FS: 00007f9d73d66700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30022000 CR3: 00000000912b8000 CR4: 00000000001406f0 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+0x495/0x900 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+0x19a/0x2260 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_notify_flags+0x1e9/0x2c0 net/core/dev.c:7607 dev_change_flags+0x10d/0x170 net/core/dev.c:7643 devinet_ioctl+0xde6/0x1cf0 net/ipv4/devinet.c:1104 inet_ioctl+0x2d4/0x410 net/ipv4/af_inet.c:954 sock_do_ioctl+0xde/0x300 net/socket.c:972 sock_ioctl+0x32b/0x610 net/socket.c:1096 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: 0033:0x458079 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:00007f9d73d65c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458079 RDX: 0000000020000040 RSI: 0000000000008914 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9d73d666d4 R13: 00000000004c3670 R14: 00000000004d64a8 R15: 00000000ffffffff Modules linked in: ---[ end trace 0cc062cf6f023283 ]--- 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 0c 6e 45 03 31 ff 44 89 f6 e8 d6 7d 5b fb 45 84 f6 0f 84 b3 00 00 00 e8 88 7c 5b 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:ffff88804004efa8 EFLAGS: 00010207 RAX: 0000000000000014 RBX: dffffc0000000000 RCX: ffffc900061b6000 RDX: 0000000000040000 RSI: ffffffff8614e7a8 RDI: 00000000000000a7 RBP: ffff88804004f000 R08: ffff88806192c500 R09: ffffed101509e0de R10: ffffed101509e0dd R11: ffff8880a84f06ef R12: 0000000000000000 R13: ffff8880a84f06c0 R14: 0000000000000001 R15: 0000000000000037 FS: 00007f9d73d66700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30022000 CR3: 00000000912b8000 CR4: 00000000001406f0