===================================================== BUG: KMSAN: uninit-value in report_sock_error net/sched/sch_etf.c:141 [inline] BUG: KMSAN: uninit-value in etf_enqueue_timesortedlist+0xd31/0x1060 net/sched/sch_etf.c:170 CPU: 0 PID: 31819 Comm: syz-executor.2 Not tainted 5.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 report_sock_error net/sched/sch_etf.c:141 [inline] etf_enqueue_timesortedlist+0xd31/0x1060 net/sched/sch_etf.c:170 __dev_xmit_skb net/core/dev.c:3710 [inline] __dev_queue_xmit+0x1c00/0x3b20 net/core/dev.c:4021 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4085 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip_finish_output2+0x20fd/0x2610 net/ipv4/ip_output.c:228 __ip_finish_output+0xaa7/0xd80 net/ipv4/ip_output.c:306 ip_finish_output+0x166/0x410 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x593/0x680 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:436 [inline] ip_local_out net/ipv4/ip_output.c:125 [inline] ip_build_and_send_pkt+0xd46/0xe80 net/ipv4/ip_output.c:181 tcp_v4_send_synack+0x56a/0x700 net/ipv4/tcp_ipv4.c:976 tcp_conn_request+0x48c0/0x4d10 net/ipv4/tcp_input.c:6719 tcp_v4_conn_request+0x19b/0x240 net/ipv4/tcp_ipv4.c:1451 tcp_v6_conn_request+0xb5/0x2d0 net/ipv6/tcp_ipv6.c:1146 tcp_rcv_state_process+0x26b/0x71c0 net/ipv4/tcp_input.c:6190 tcp_v4_do_rcv+0xb0f/0xd70 net/ipv4/tcp_ipv4.c:1641 tcp_v4_rcv+0x3f39/0x4d00 net/ipv4/tcp_ipv4.c:1989 ip_protocol_deliver_rcu+0x4b7/0xbc0 net/ipv4/ip_input.c:204 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x62a/0x7c0 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish net/ipv4/ip_input.c:428 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0x6cf/0x750 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core net/core/dev.c:5187 [inline] __netif_receive_skb net/core/dev.c:5301 [inline] netif_receive_skb_internal net/core/dev.c:5391 [inline] netif_receive_skb+0xbb5/0xf20 net/core/dev.c:5450 tun_rx_batched include/linux/skbuff.h:4351 [inline] tun_get_user+0x6aef/0x6f60 drivers/net/tun.c:1997 tun_chr_write_iter+0x1f2/0x360 drivers/net/tun.c:2026 call_write_iter include/linux/fs.h:1902 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0xa5a/0xca0 fs/read_write.c:496 vfs_write+0x44a/0x8f0 fs/read_write.c:558 ksys_write+0x267/0x450 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write+0x92/0xb0 fs/read_write.c:620 __x64_sys_write+0x4a/0x70 fs/read_write.c:620 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416361 Code: 75 14 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 c4 1b 00 00 c3 48 83 ec 08 e8 ca fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 13 fd ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fc6b567ac60 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000005078c0 RCX: 0000000000416361 RDX: 0000000000000036 RSI: 00000000200001c0 RDI: 00000000000000f0 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000bb6 R14: 00000000004cdddc R15: 00007fc6b567b6d4 Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:144 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:280 [inline] kmsan_alloc_page+0xb9/0x180 mm/kmsan/kmsan_shadow.c:304 __alloc_pages_nodemask+0x5712/0x5e80 mm/page_alloc.c:4776 alloc_pages_current+0x67d/0x990 mm/mempolicy.c:2211 alloc_pages include/linux/gfp.h:532 [inline] alloc_slab_page+0x111/0x12f0 mm/slub.c:1530 allocate_slab mm/slub.c:1675 [inline] new_slab+0x2bc/0x1130 mm/slub.c:1741 new_slab_objects mm/slub.c:2490 [inline] ___slab_alloc+0x14a3/0x2040 mm/slub.c:2651 __slab_alloc mm/slub.c:2691 [inline] slab_alloc_node mm/slub.c:2765 [inline] slab_alloc mm/slub.c:2810 [inline] kmem_cache_alloc+0xb23/0xd70 mm/slub.c:2815 reqsk_alloc include/net/request_sock.h:84 [inline] inet_reqsk_alloc+0xac/0x830 net/ipv4/tcp_input.c:6493 tcp_conn_request+0x753/0x4d10 net/ipv4/tcp_input.c:6619 tcp_v4_conn_request+0x19b/0x240 net/ipv4/tcp_ipv4.c:1451 tcp_rcv_state_process+0x26b/0x71c0 net/ipv4/tcp_input.c:6190 tcp_v4_do_rcv+0xb0f/0xd70 net/ipv4/tcp_ipv4.c:1641 tcp_v4_rcv+0x3f39/0x4d00 net/ipv4/tcp_ipv4.c:1989 ip_protocol_deliver_rcu+0x4b7/0xbc0 net/ipv4/ip_input.c:204 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x62a/0x7c0 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:549 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:599 [inline] ip_sublist_rcv+0x11fa/0x13c0 net/ipv4/ip_input.c:607 ip_list_rcv+0x8eb/0x950 net/ipv4/ip_input.c:642 __netif_receive_skb_list_ptype net/core/dev.c:5230 [inline] __netif_receive_skb_list_core+0x1311/0x1380 net/core/dev.c:5278 __netif_receive_skb_list net/core/dev.c:5330 [inline] netif_receive_skb_list_internal+0xf62/0x1620 net/core/dev.c:5425 gro_normal_list net/core/dev.c:5536 [inline] napi_complete_done+0x2ef/0xb60 net/core/dev.c:6257 virtqueue_napi_complete+0xb9/0x1f0 drivers/net/virtio_net.c:329 virtnet_poll+0x1468/0x19f0 drivers/net/virtio_net.c:1432 napi_poll net/core/dev.c:6571 [inline] net_rx_action+0x786/0x1aa0 net/core/dev.c:6639 __do_softirq+0x311/0x83d kernel/softirq.c:293 =====================================================