Warning: Permanently added '10.128.0.252' (ECDSA) to the list of known hosts. [ 53.683173][ T3505] chnl_net:caif_netlink_parms(): no params data found [ 53.730643][ T3505] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.738232][ T3505] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.746477][ T3505] device bridge_slave_0 entered promiscuous mode [ 53.755569][ T3505] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.762803][ T3505] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.770744][ T3505] device bridge_slave_1 entered promiscuous mode [ 53.793734][ T3505] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 53.805133][ T3505] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 53.829552][ T3505] team0: Port device team_slave_0 added [ 53.837134][ T3505] team0: Port device team_slave_1 added [ 53.856949][ T3505] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 53.863941][ T3505] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 53.889847][ T3505] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 53.903435][ T3505] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 53.910377][ T3505] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 53.936520][ T3505] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 53.968267][ T3505] device hsr_slave_0 entered promiscuous mode [ 53.975533][ T3505] device hsr_slave_1 entered promiscuous mode [ 54.070689][ T3505] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 54.082010][ T3505] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 54.091372][ T3505] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 54.100830][ T3505] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 54.125359][ T3505] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.132556][ T3505] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.140306][ T3505] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.147414][ T3505] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.197489][ T3505] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.210119][ T1067] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.221150][ T1067] bridge0: port 1(bridge_slave_0) entered disabled state [ 54.230283][ T1067] bridge0: port 2(bridge_slave_1) entered disabled state [ 54.239200][ T1067] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 54.253084][ T3505] 8021q: adding VLAN 0 to HW filter on device team0 [ 54.265007][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 54.273766][ T21] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.280823][ T21] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.294119][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 54.302833][ T21] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.309869][ T21] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.337686][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 54.346609][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 54.355372][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 54.363937][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 54.373228][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 54.383741][ T3505] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 54.402097][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 54.409671][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 54.423122][ T3505] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 54.443296][ T1070] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 54.462973][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 54.471487][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 54.480008][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 54.489612][ T3505] device veth0_vlan entered promiscuous mode [ 54.502567][ T3505] device veth1_vlan entered promiscuous mode [ 54.522728][ T1067] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 54.530752][ T1067] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 54.540633][ T1067] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 54.552945][ T3505] device veth0_macvtap entered promiscuous mode [ 54.562762][ T3505] device veth1_macvtap entered promiscuous mode [ 54.579746][ T3505] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 54.587279][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 54.597477][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 54.609400][ T3505] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 54.617833][ T3514] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 54.629062][ T3505] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.638434][ T3505] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.647264][ T3505] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.657291][ T3505] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.694555][ T3505] ------------[ cut here ]------------ [ 54.700078][ T3505] WARNING: CPU: 1 PID: 3505 at net/core/dev.c:3249 skb_checksum_help+0x3c3/0x560 [ 54.709264][ T3505] Modules linked in: [ 54.713193][ T3505] CPU: 1 PID: 3505 Comm: syz-executor593 Not tainted 5.15.119-syzkaller #0 [ 54.721832][ T3505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 54.732044][ T3505] RIP: 0010:skb_checksum_help+0x3c3/0x560 [ 54.737791][ T3505] Code: ff eb e3 e8 bf f3 4c f9 4c 89 ff e8 b7 01 00 00 bb ea ff ff ff eb cf e8 ab f3 4c f9 0f 0b bb ea ff ff ff eb c1 e8 9d f3 4c f9 <0f> 0b bb ea ff ff ff eb b3 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 5f [ 54.757447][ T3505] RSP: 0018:ffffc900011deec8 EFLAGS: 00010293 [ 54.763559][ T3505] RAX: ffffffff88330d03 RBX: 00000000000006aa RCX: ffff888018cc1dc0 [ 54.771533][ T3505] RDX: 0000000000000000 RSI: 0000000000000688 RDI: 00000000000006aa [ 54.779548][ T3505] RBP: 0000000000000688 R08: ffffffff88330bf2 R09: fffff5200023bdca [ 54.787563][ T3505] R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 [ 54.795583][ T3505] R13: ffff88807e49fa70 R14: 1ffff1100fc93f50 R15: ffff88807e49fa00 [ 54.803685][ T3505] FS: 0000555555684300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 54.812672][ T3505] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.819278][ T3505] CR2: 0000000020001000 CR3: 000000001a960000 CR4: 00000000003506e0 [ 54.827307][ T3505] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.835323][ T3505] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.843331][ T3505] Call Trace: [ 54.846623][ T3505] [ 54.849547][ T3505] ? __warn+0x15b/0x300 [ 54.853742][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 54.858865][ T3505] ? report_bug+0x1b7/0x2e0 [ 54.863421][ T3505] ? handle_bug+0x3d/0x70 [ 54.867763][ T3505] ? exc_invalid_op+0x16/0x40 [ 54.872496][ T3505] ? asm_exc_invalid_op+0x16/0x20 [ 54.877575][ T3505] ? skb_checksum_help+0x2b2/0x560 [ 54.882724][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 54.887849][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 54.893007][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 54.898136][ T3505] ip_do_fragment+0x1cf/0x1f10 [ 54.902938][ T3505] ? print_irqtrace_events+0x210/0x210 [ 54.908435][ T3505] ? kasan_quarantine_put+0xd4/0x220 [ 54.913776][ T3505] ? lockdep_hardirqs_on+0x94/0x130 [ 54.918985][ T3505] ? ip_fragment+0x210/0x210 [ 54.923615][ T3505] ? ip_frag_next+0xad0/0xad0 [ 54.928306][ T3505] ? slab_free_freelist_hook+0xdd/0x160 [ 54.933891][ T3505] ? __ip_finish_output+0x276/0x4a0 [ 54.939111][ T3505] ? kmem_cache_free+0x146/0x1f0 [ 54.944117][ T3505] ? ip_fragment+0x9a/0x210 [ 54.948646][ T3505] __ip_finish_output+0x2bd/0x4a0 [ 54.953727][ T3505] iptunnel_xmit+0x50c/0x960 [ 54.958355][ T3505] ip_tunnel_xmit+0x1931/0x2770 [ 54.963254][ T3505] ? ip_tunnel_xmit+0xe1/0x2770 [ 54.968129][ T3505] ? validate_xmit_xfrm+0xb4/0x1020 [ 54.973391][ T3505] ? tnl_update_pmtu+0x10b0/0x10b0 [ 54.978519][ T3505] ? skb_network_protocol+0x6df/0x770 [ 54.983939][ T3505] ? gre_build_header+0x25b/0x8a0 [ 54.988983][ T3505] ipgre_xmit+0x756/0xa60 [ 54.993363][ T3505] dev_hard_start_xmit+0x298/0x7a0 [ 54.998495][ T3505] __dev_queue_xmit+0x1cee/0x3230 [ 55.003560][ T3505] ? __might_sleep+0xc0/0xc0 [ 55.008170][ T3505] ? dev_queue_xmit+0x20/0x20 [ 55.012901][ T3505] ? virtio_net_hdr_to_skb+0x9c1/0x10c0 [ 55.018471][ T3505] ? packet_cached_dev_get+0x260/0x260 [ 55.023980][ T3505] packet_sendmsg+0x4478/0x5e70 [ 55.028851][ T3505] ? aa_sk_perm+0xa30/0xa30 [ 55.033427][ T3505] ? __might_sleep+0xc0/0xc0 [ 55.038039][ T3505] ? aa_sk_perm+0x8fc/0xa30 [ 55.042582][ T3505] ? packet_getsockopt+0xed0/0xed0 [ 55.047711][ T3505] ? aa_sock_msg_perm+0x91/0x150 [ 55.052706][ T3505] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 55.058004][ T3505] ? security_socket_sendmsg+0x7d/0xa0 [ 55.063502][ T3505] ? packet_getsockopt+0xed0/0xed0 [ 55.068629][ T3505] ____sys_sendmsg+0x59e/0x8f0 [ 55.073432][ T3505] ? iovec_from_user+0x300/0x390 [ 55.078412][ T3505] ? __sys_sendmsg_sock+0x30/0x30 [ 55.083490][ T3505] ___sys_sendmsg+0x252/0x2e0 [ 55.088184][ T3505] ? __sys_sendmsg+0x260/0x260 [ 55.092992][ T3505] ? __lock_acquire+0x1295/0x1ff0 [ 55.098053][ T3505] ? __context_tracking_enter+0x5f/0x90 [ 55.103649][ T3505] ? __context_tracking_exit+0x4c/0x80 [ 55.109137][ T3505] ? __fdget+0x158/0x220 [ 55.113437][ T3505] __se_sys_sendmsg+0x19a/0x260 [ 55.118299][ T3505] ? __x64_sys_sendmsg+0x80/0x80 [ 55.123300][ T3505] ? syscall_enter_from_user_mode+0x2e/0x230 [ 55.129294][ T3505] ? lockdep_hardirqs_on+0x94/0x130 [ 55.134568][ T3505] ? syscall_enter_from_user_mode+0x2e/0x230 [ 55.140580][ T3505] do_syscall_64+0x3d/0xb0 [ 55.145143][ T3505] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 55.151057][ T3505] RIP: 0033:0x7f70c1c83569 [ 55.155517][ T3505] Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 55.175175][ T3505] RSP: 002b:00007ffd5d0419e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.183636][ T3505] RAX: ffffffffffffffda RBX: 00007ffd5d0419f8 RCX: 00007f70c1c83569 [ 55.191667][ T3505] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 55.199655][ T3505] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 55.207777][ T3505] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffd5d041a00 [ 55.215799][ T3505] R13: 00007ffd5d041a20 R14: 0000000000000000 R15: 0000000000000000 [ 55.223827][ T3505] [ 55.226857][ T3505] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 55.234125][ T3505] CPU: 1 PID: 3505 Comm: syz-executor593 Not tainted 5.15.119-syzkaller #0 [ 55.242700][ T3505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 55.252751][ T3505] Call Trace: [ 55.256034][ T3505] [ 55.258958][ T3505] dump_stack_lvl+0x1e3/0x2cb [ 55.263637][ T3505] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 55.269265][ T3505] ? panic+0x84d/0x84d [ 55.273325][ T3505] ? skb_checksum_help+0x3c0/0x560 [ 55.278432][ T3505] ? skb_checksum_help+0x3c0/0x560 [ 55.283536][ T3505] panic+0x318/0x84d [ 55.287425][ T3505] ? __warn+0x16a/0x300 [ 55.291581][ T3505] ? fb_is_primary_device+0xcc/0xcc [ 55.296788][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 55.301897][ T3505] __warn+0x2b2/0x300 [ 55.305872][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 55.310971][ T3505] report_bug+0x1b7/0x2e0 [ 55.315295][ T3505] handle_bug+0x3d/0x70 [ 55.319444][ T3505] exc_invalid_op+0x16/0x40 [ 55.323941][ T3505] asm_exc_invalid_op+0x16/0x20 [ 55.328785][ T3505] RIP: 0010:skb_checksum_help+0x3c3/0x560 [ 55.334504][ T3505] Code: ff eb e3 e8 bf f3 4c f9 4c 89 ff e8 b7 01 00 00 bb ea ff ff ff eb cf e8 ab f3 4c f9 0f 0b bb ea ff ff ff eb c1 e8 9d f3 4c f9 <0f> 0b bb ea ff ff ff eb b3 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 5f [ 55.354104][ T3505] RSP: 0018:ffffc900011deec8 EFLAGS: 00010293 [ 55.360174][ T3505] RAX: ffffffff88330d03 RBX: 00000000000006aa RCX: ffff888018cc1dc0 [ 55.368138][ T3505] RDX: 0000000000000000 RSI: 0000000000000688 RDI: 00000000000006aa [ 55.376190][ T3505] RBP: 0000000000000688 R08: ffffffff88330bf2 R09: fffff5200023bdca [ 55.384161][ T3505] R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 [ 55.392139][ T3505] R13: ffff88807e49fa70 R14: 1ffff1100fc93f50 R15: ffff88807e49fa00 [ 55.400119][ T3505] ? skb_checksum_help+0x2b2/0x560 [ 55.405226][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 55.410335][ T3505] ? skb_checksum_help+0x3c3/0x560 [ 55.415445][ T3505] ip_do_fragment+0x1cf/0x1f10 [ 55.420209][ T3505] ? print_irqtrace_events+0x210/0x210 [ 55.425664][ T3505] ? kasan_quarantine_put+0xd4/0x220 [ 55.430944][ T3505] ? lockdep_hardirqs_on+0x94/0x130 [ 55.436137][ T3505] ? ip_fragment+0x210/0x210 [ 55.440725][ T3505] ? ip_frag_next+0xad0/0xad0 [ 55.445402][ T3505] ? slab_free_freelist_hook+0xdd/0x160 [ 55.450950][ T3505] ? __ip_finish_output+0x276/0x4a0 [ 55.456143][ T3505] ? kmem_cache_free+0x146/0x1f0 [ 55.461070][ T3505] ? ip_fragment+0x9a/0x210 [ 55.465571][ T3505] __ip_finish_output+0x2bd/0x4a0 [ 55.470600][ T3505] iptunnel_xmit+0x50c/0x960 [ 55.475190][ T3505] ip_tunnel_xmit+0x1931/0x2770 [ 55.480061][ T3505] ? ip_tunnel_xmit+0xe1/0x2770 [ 55.484997][ T3505] ? validate_xmit_xfrm+0xb4/0x1020 [ 55.490187][ T3505] ? tnl_update_pmtu+0x10b0/0x10b0 [ 55.495288][ T3505] ? skb_network_protocol+0x6df/0x770 [ 55.500672][ T3505] ? gre_build_header+0x25b/0x8a0 [ 55.505695][ T3505] ipgre_xmit+0x756/0xa60 [ 55.510025][ T3505] dev_hard_start_xmit+0x298/0x7a0 [ 55.515136][ T3505] __dev_queue_xmit+0x1cee/0x3230 [ 55.520182][ T3505] ? __might_sleep+0xc0/0xc0 [ 55.524772][ T3505] ? dev_queue_xmit+0x20/0x20 [ 55.529444][ T3505] ? virtio_net_hdr_to_skb+0x9c1/0x10c0 [ 55.534990][ T3505] ? packet_cached_dev_get+0x260/0x260 [ 55.540463][ T3505] packet_sendmsg+0x4478/0x5e70 [ 55.545308][ T3505] ? aa_sk_perm+0xa30/0xa30 [ 55.549812][ T3505] ? __might_sleep+0xc0/0xc0 [ 55.554402][ T3505] ? aa_sk_perm+0x8fc/0xa30 [ 55.558904][ T3505] ? packet_getsockopt+0xed0/0xed0 [ 55.564013][ T3505] ? aa_sock_msg_perm+0x91/0x150 [ 55.568974][ T3505] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 55.574258][ T3505] ? security_socket_sendmsg+0x7d/0xa0 [ 55.579711][ T3505] ? packet_getsockopt+0xed0/0xed0 [ 55.584827][ T3505] ____sys_sendmsg+0x59e/0x8f0 [ 55.589616][ T3505] ? iovec_from_user+0x300/0x390 [ 55.594552][ T3505] ? __sys_sendmsg_sock+0x30/0x30 [ 55.599586][ T3505] ___sys_sendmsg+0x252/0x2e0 [ 55.604259][ T3505] ? __sys_sendmsg+0x260/0x260 [ 55.609018][ T3505] ? __lock_acquire+0x1295/0x1ff0 [ 55.614053][ T3505] ? __context_tracking_enter+0x5f/0x90 [ 55.619608][ T3505] ? __context_tracking_exit+0x4c/0x80 [ 55.625057][ T3505] ? __fdget+0x158/0x220 [ 55.629298][ T3505] __se_sys_sendmsg+0x19a/0x260 [ 55.634145][ T3505] ? __x64_sys_sendmsg+0x80/0x80 [ 55.639084][ T3505] ? syscall_enter_from_user_mode+0x2e/0x230 [ 55.645056][ T3505] ? lockdep_hardirqs_on+0x94/0x130 [ 55.650246][ T3505] ? syscall_enter_from_user_mode+0x2e/0x230 [ 55.656219][ T3505] do_syscall_64+0x3d/0xb0 [ 55.660634][ T3505] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 55.666521][ T3505] RIP: 0033:0x7f70c1c83569 [ 55.670932][ T3505] Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 55.690536][ T3505] RSP: 002b:00007ffd5d0419e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.698952][ T3505] RAX: ffffffffffffffda RBX: 00007ffd5d0419f8 RCX: 00007f70c1c83569 [ 55.706922][ T3505] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 55.714886][ T3505] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 55.722851][ T3505] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffd5d041a00 [ 55.730811][ T3505] R13: 00007ffd5d041a20 R14: 0000000000000000 R15: 0000000000000000 [ 55.738784][ T3505] [ 55.742103][ T3505] Kernel Offset: disabled [ 55.746489][ T3505] Rebooting in 86400 seconds..