Not allocated shadow for addr ffff8801b5500000 (page ffffea000a3fe000) IPVS: Unknown mcast interface: syz_tun Attempted to access 126 bytes ------------[ cut here ]------------ IPVS: Unknown mcast interface: syz_tun kernel BUG at mm/kmsan/kmsan.c:1344! invalid opcode: 0000 [#1] SMP PTI Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 4501 Comm: sshd Not tainted 4.17.0-rc5+ #102 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 mm/kmsan/kmsan.c:1343 IPVS: Unknown mcast interface: syz_tun RSP: 0018:ffff8801ce13e6f0 EFLAGS: 00010082 RAX: 000000000000001d RBX: 00000000000006c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8b57a178 RBP: ffff8801ce13e708 R08: 000000a4eddd4736 R09: ffffffff8b5640dd R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b5500000 IPVS: Unknown mcast interface: syz_tun R13: 000000000000007e R14: 0000000000000001 R15: 000000000000007e FS: 00007eff711657c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6797553000 CR3: 00000001cab54000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 IPVS: Unknown mcast interface: syz_tun DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kmsan_internal_memset_shadow mm/kmsan/kmsan.c:172 [inline] kmsan_internal_unpoison_shadow+0x5c/0xe0 mm/kmsan/kmsan.c:209 kmsan_unpoison_shadow+0x66/0xb0 mm/kmsan/kmsan.c:223 IPVS: Unknown mcast interface: syz_tun virtqueue_get_buf_ctx+0x73f/0xa20 drivers/virtio/virtio_ring.c:759 virtqueue_get_buf+0x72/0x90 drivers/virtio/virtio_ring.c:766 free_old_xmit_skbs drivers/net/virtio_net.c:1234 [inline] start_xmit+0x293/0x29b0 drivers/net/virtio_net.c:1399 IPVS: Unknown mcast interface: syz_tun IPVS: Unknown mcast interface: syz_tun __netdev_start_xmit include/linux/netdevice.h:4087 [inline] netdev_start_xmit include/linux/netdevice.h:4096 [inline] xmit_one net/core/dev.c:3053 [inline] dev_hard_start_xmit+0x5f1/0xc70 net/core/dev.c:3069 sch_direct_xmit+0x578/0x8f0 net/sched/sch_generic.c:327 IPVS: Unknown mcast interface: syz_tun qdisc_restart net/sched/sch_generic.c:399 [inline] __qdisc_run+0x1785/0x3730 net/sched/sch_generic.c:410 __dev_xmit_skb net/core/dev.c:3244 [inline] __dev_queue_xmit+0x1d50/0x3510 net/core/dev.c:3552 IPVS: Unknown mcast interface: syz_tun dev_queue_xmit+0x4b/0x60 net/core/dev.c:3617 neigh_hh_output include/net/neighbour.h:472 [inline] neigh_output include/net/neighbour.h:480 [inline] ip_finish_output2+0x12bf/0x1490 net/ipv4/ip_output.c:229 ip_finish_output+0xcaf/0xff0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip_output+0x505/0x5d0 net/ipv4/ip_output.c:405 IPVS: Unknown mcast interface: syz_tun dst_output include/net/dst.h:444 [inline] ip_local_out net/ipv4/ip_output.c:124 [inline] ip_queue_xmit+0x1a1d/0x1d10 net/ipv4/ip_output.c:504 IPVS: Unknown mcast interface: syz_tun IPVS: Unknown mcast interface: syz_tun IPVS: Unknown mcast interface: syz_tun tcp_transmit_skb+0x3d6d/0x53b0 net/ipv4/tcp_output.c:1176 tcp_write_xmit+0x2d71/0xb1f0 net/ipv4/tcp_output.c:2373 __tcp_push_pending_frames+0x124/0x400 net/ipv4/tcp_output.c:2546 IPVS: Unknown mcast interface: syz_tun tcp_push+0x803/0x8f0 net/ipv4/tcp.c:735 tcp_sendmsg_locked+0x4eb1/0x6610 net/ipv4/tcp.c:1410 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1447 IPVS: Unknown mcast interface: syz_tun inet_sendmsg+0x3f7/0x750 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg net/socket.c:639 [inline] sock_write_iter+0x3b7/0x470 net/socket.c:908 IPVS: Unknown mcast interface: syz_tun call_write_iter include/linux/fs.h:1784 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x7fb/0x9f0 fs/read_write.c:487 vfs_write+0x467/0x8c0 fs/read_write.c:549 ksys_write fs/read_write.c:598 [inline] __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x1bf/0x3e0 fs/read_write.c:607 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287 IPVS: Unknown mcast interface: syz_tun entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7eff6f500370 RSP: 002b:00007ffee86bfc98 EFLAGS: 00000246 IPVS: Unknown mcast interface: syz_tun ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007eff6f500370 RDX: 0000000000000038 RSI: 000055747a737210 RDI: 0000000000000003 RBP: 000055747a737210 R08: 0000000000000001 R09: 0101010101010101 R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffee86bfcfc R13: 0000557478a58fb4 R14: 0000000000000028 R15: 0000557478a5aca0 Code: 75 29 IPVS: Unknown mcast interface: syz_tun 48 c7 c7 83 00 a0 8a 31 c0 e8 7d 14 83 ff 80 3c 25 f8 73 53 8b 00 75 11 48 c7 c7 b3 00 a0 8a 31 c0 4c 89 fe e8 62 14 83 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 RIP: kmsan_get_shadow_address+0x1ce/0x1f0 mm/kmsan/kmsan.c:1343 RSP: ffff8801ce13e6f0 ---[ end trace e40f70bdd54b5971 ]---