===================================================== BUG: KMSAN: uninit-value in skbprio_enqueue+0xb8f/0x18f0 net/sched/sch_skbprio.c:82 CPU: 0 PID: 24277 Comm: syz-executor.1 Not tainted 5.7.0-rc4-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:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 skbprio_enqueue+0xb8f/0x18f0 net/sched/sch_skbprio.c:82 __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:435 [inline] ip_local_out net/ipv4/ip_output.c:125 [inline] __ip_queue_xmit+0x1b5c/0x21a0 net/ipv4/ip_output.c:530 ip_queue_xmit+0xcc/0xf0 include/net/ip.h:237 __tcp_transmit_skb+0x4221/0x6090 net/ipv4/tcp_output.c:1238 tcp_transmit_skb net/ipv4/tcp_output.c:1254 [inline] tcp_send_syn_data net/ipv4/tcp_output.c:3625 [inline] tcp_connect+0x5b56/0x6920 net/ipv4/tcp_output.c:3664 tcp_v4_connect+0x21fd/0x2370 net/ipv4/tcp_ipv4.c:311 __inet_stream_connect+0x2fb/0x1340 net/ipv4/af_inet.c:655 tcp_sendmsg_fastopen net/ipv4/tcp.c:1164 [inline] tcp_sendmsg_locked+0x670d/0x6d00 net/ipv4/tcp.c:1206 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1433 inet_sendmsg+0x178/0x2e0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] __sys_sendto+0xaba/0xc50 net/socket.c:2000 __do_sys_sendto net/socket.c:2012 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2008 __x64_sys_sendto+0x6e/0x90 net/socket.c:2008 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca29 Code: 0d 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa5b1398c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000005011c0 RCX: 000000000045ca29 RDX: fffffffffffffdc0 RSI: 0000000020000200 RDI: 0000000000000006 RBP: 000000000078c040 R08: 00000000200003c0 R09: 000000000000004a R10: 0000000020001732 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a0e R14: 00000000004cce56 R15: 00007fa5b13996d4 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:165 skbprio_change+0xba/0xc0 net/sched/sch_skbprio.c:172 qdisc_change net/sched/sch_api.c:1328 [inline] tc_modify_qdisc+0x2b80/0x31c0 net/sched/sch_api.c:1630 rtnetlink_rcv_msg+0x1153/0x1570 net/core/rtnetlink.c:5454 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5472 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80 slab_alloc_node mm/slub.c:2802 [inline] __kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4436 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1175 [inline] netlink_sendmsg+0x7d3/0x14d0 net/netlink/af_netlink.c:1893 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 =====================================================