===================================================== BUG: KMSAN: uninit-value in udplite_error syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/nf_conntrack_proto_udp.c:162 [inline] BUG: KMSAN: uninit-value in nf_conntrack_udplite_packet+0x6cc/0x12d0 syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/nf_conntrack_proto_udp.c:188 CPU: 1 PID: 430 Comm: syz-executor.3 Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/upstream-kmsan-gce/kernel/lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 syzkaller/managers/upstream-kmsan-gce/kernel/lib/dump_stack.c:118 kmsan_report+0xfb/0x1e0 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan_instr.c:197 udplite_error syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/nf_conntrack_proto_udp.c:162 [inline] nf_conntrack_udplite_packet+0x6cc/0x12d0 syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/nf_conntrack_proto_udp.c:188 nf_conntrack_handle_packet syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/nf_conntrack_core.c:1768 [inline] nf_conntrack_in+0x104b/0x296d syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/nf_conntrack_core.c:1846 ipv4_conntrack_local+0x225/0x3b0 syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/nf_conntrack_proto.c:200 nf_hook_entry_hookfn syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/netfilter.h:136 [inline] nf_hook_slow+0x17b/0x460 syzkaller/managers/upstream-kmsan-gce/kernel/net/netfilter/core.c:589 nf_hook syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/netfilter.h:256 [inline] __ip_local_out+0x78c/0x840 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/ip_output.c:115 ip_local_out syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/ip_output.c:124 [inline] ip_send_skb+0xb1/0x350 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/ip_output.c:1568 udp_send_skb+0x152d/0x1bc0 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/udp.c:948 udp_push_pending_frames syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/udp.c:976 [inline] udp_sendpage+0x7f2/0xba0 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/udp.c:1347 inet_sendpage+0x1da/0x2f0 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/af_inet.c:831 kernel_sendpage+0x47a/0x590 syzkaller/managers/upstream-kmsan-gce/kernel/net/socket.c:3646 sock_sendpage+0x161/0x1a0 syzkaller/managers/upstream-kmsan-gce/kernel/net/socket.c:944 pipe_to_sendpage+0x3e4/0x520 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:364 splice_from_pipe_feed syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:418 [inline] __splice_from_pipe+0x5e3/0xff0 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:562 splice_from_pipe syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:597 [inline] generic_splice_sendpage+0x1d5/0x2c0 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:743 do_splice_from syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:764 [inline] do_splice+0x2371/0x3510 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1059 __do_splice syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1137 [inline] __do_sys_splice syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1343 [inline] __se_sys_splice+0x8fa/0xb50 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1325 __x64_sys_splice+0x6e/0x90 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1325 do_syscall_64+0x9f/0x140 syzkaller/managers/upstream-kmsan-gce/kernel/arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efc20399188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000004b069f R08: 0000000080000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 0000000000a9fb1f R14: 00007efc20399300 R15: 0000000000022000 Uninit was stored to memory at: kmsan_save_stack_with_flags syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:121 [inline] kmsan_internal_chain_origin+0xad/0x130 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:289 __msan_chain_origin+0x57/0xa0 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan_instr.c:147 udp_send_skb+0x1767/0x1bc0 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/udp.c:943 udp_push_pending_frames syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/udp.c:976 [inline] udp_sendpage+0x7f2/0xba0 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/udp.c:1347 inet_sendpage+0x1da/0x2f0 syzkaller/managers/upstream-kmsan-gce/kernel/net/ipv4/af_inet.c:831 kernel_sendpage+0x47a/0x590 syzkaller/managers/upstream-kmsan-gce/kernel/net/socket.c:3646 sock_sendpage+0x161/0x1a0 syzkaller/managers/upstream-kmsan-gce/kernel/net/socket.c:944 pipe_to_sendpage+0x3e4/0x520 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:364 splice_from_pipe_feed syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:418 [inline] __splice_from_pipe+0x5e3/0xff0 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:562 splice_from_pipe syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:597 [inline] generic_splice_sendpage+0x1d5/0x2c0 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:743 do_splice_from syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:764 [inline] do_splice+0x2371/0x3510 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1059 __do_splice syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1137 [inline] __do_sys_splice syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1343 [inline] __se_sys_splice+0x8fa/0xb50 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1325 __x64_sys_splice+0x6e/0x90 syzkaller/managers/upstream-kmsan-gce/kernel/fs/splice.c:1325 do_syscall_64+0x9f/0x140 syzkaller/managers/upstream-kmsan-gce/kernel/arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:121 [inline] kmsan_internal_chain_origin+0xad/0x130 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:289 kmsan_memcpy_memmove_metadata+0x25e/0x2d0 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:226 kmsan_memcpy_metadata+0xb/0x10 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:246 __msan_memcpy+0x46/0x60 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan_instr.c:110 skb_copy_from_linear_data_offset syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/skbuff.h:3660 [inline] skb_copy_bits+0x293/0x1040 syzkaller/managers/upstream-kmsan-gce/kernel/net/core/skbuff.c:2195 tpacket_rcv+0x56a6/0x7ef0 syzkaller/managers/upstream-kmsan-gce/kernel/net/packet/af_packet.c:2324 __netif_receive_skb_one_core syzkaller/managers/upstream-kmsan-gce/kernel/net/core/dev.c:5315 [inline] __netif_receive_skb+0x1ec/0x640 syzkaller/managers/upstream-kmsan-gce/kernel/net/core/dev.c:5429 process_backlog+0x517/0xbd0 syzkaller/managers/upstream-kmsan-gce/kernel/net/core/dev.c:6319 napi_poll+0x40a/0x1020 syzkaller/managers/upstream-kmsan-gce/kernel/net/core/dev.c:6763 net_rx_action+0x34c/0xd30 syzkaller/managers/upstream-kmsan-gce/kernel/net/core/dev.c:6833 __do_softirq+0x1a9/0x6fa syzkaller/managers/upstream-kmsan-gce/kernel/kernel/softirq.c:298 Uninit was stored to memory at: kmsan_save_stack_with_flags syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:121 [inline] kmsan_internal_chain_origin+0xad/0x130 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:289 kmsan_memcpy_memmove_metadata+0x25e/0x2d0 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:226 kmsan_memcpy_metadata+0xb/0x10 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:246 __msan_memcpy+0x46/0x60 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan_instr.c:110 pskb_expand_head+0x3d6/0x1e20 syzkaller/managers/upstream-kmsan-gce/kernel/net/core/skbuff.c:1631 __skb_cow syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/skbuff.h:3165 [inline] skb_cow_head syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/skbuff.h:3199 [inline] batadv_skb_head_push+0x2cc/0x410 syzkaller/managers/upstream-kmsan-gce/kernel/net/batman-adv/soft-interface.c:75 batadv_send_skb_packet+0x1ed/0x970 syzkaller/managers/upstream-kmsan-gce/kernel/net/batman-adv/send.c:86 batadv_send_broadcast_skb+0x76/0x90 syzkaller/managers/upstream-kmsan-gce/kernel/net/batman-adv/send.c:127 batadv_iv_ogm_send_to_if syzkaller/managers/upstream-kmsan-gce/kernel/net/batman-adv/bat_iv_ogm.c:394 [inline] batadv_iv_ogm_emit syzkaller/managers/upstream-kmsan-gce/kernel/net/batman-adv/bat_iv_ogm.c:420 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0xb2d/0xef0 syzkaller/managers/upstream-kmsan-gce/kernel/net/batman-adv/bat_iv_ogm.c:1712 process_one_work+0x1219/0x1fe0 syzkaller/managers/upstream-kmsan-gce/kernel/kernel/workqueue.c:2272 worker_thread+0x123c/0x2730 syzkaller/managers/upstream-kmsan-gce/kernel/kernel/workqueue.c:2418 kthread+0x51c/0x560 syzkaller/managers/upstream-kmsan-gce/kernel/kernel/kthread.c:292 ret_from_fork+0x1f/0x30 syzkaller/managers/upstream-kmsan-gce/kernel/arch/x86/entry/entry_64.S:296 Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan.c:121 kmsan_alloc_page+0xd3/0x1f0 syzkaller/managers/upstream-kmsan-gce/kernel/mm/kmsan/kmsan_shadow.c:274 __alloc_pages_nodemask+0x827/0xf90 syzkaller/managers/upstream-kmsan-gce/kernel/mm/page_alloc.c:4989 __alloc_pages syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/gfp.h:511 [inline] __alloc_pages_node syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/gfp.h:524 [inline] alloc_pages_node syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/gfp.h:538 [inline] __page_frag_cache_refill syzkaller/managers/upstream-kmsan-gce/kernel/mm/page_alloc.c:5065 [inline] page_frag_alloc+0x357/0x890 syzkaller/managers/upstream-kmsan-gce/kernel/mm/page_alloc.c:5095 __netdev_alloc_skb+0xbe2/0xc40 syzkaller/managers/upstream-kmsan-gce/kernel/net/core/skbuff.c:456 netdev_alloc_skb syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/skbuff.h:2826 [inline] dev_alloc_skb syzkaller/managers/upstream-kmsan-gce/kernel/./include/linux/skbuff.h:2839 [inline] __ieee80211_beacon_get+0x1202/0x3430 syzkaller/managers/upstream-kmsan-gce/kernel/net/mac80211/tx.c:4837 ieee80211_beacon_get_tim+0x114/0x830 syzkaller/managers/upstream-kmsan-gce/kernel/net/mac80211/tx.c:4951 ieee80211_beacon_get syzkaller/managers/upstream-kmsan-gce/kernel/./include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x1ce/0xd30 syzkaller/managers/upstream-kmsan-gce/kernel/drivers/net/wireless/mac80211_hwsim.c:1729 __iterate_interfaces+0x4ed/0x7a0 syzkaller/managers/upstream-kmsan-gce/kernel/net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0xbb/0xd0 syzkaller/managers/upstream-kmsan-gce/kernel/net/mac80211/util.c:828 mac80211_hwsim_beacon+0x11a/0x2e0 syzkaller/managers/upstream-kmsan-gce/kernel/drivers/net/wireless/mac80211_hwsim.c:1782 __run_hrtimer+0x48b/0xd20 syzkaller/managers/upstream-kmsan-gce/kernel/kernel/time/hrtimer.c:1519 __hrtimer_run_queues syzkaller/managers/upstream-kmsan-gce/kernel/kernel/time/hrtimer.c:1583 [inline] hrtimer_run_softirq+0x3bf/0x690 syzkaller/managers/upstream-kmsan-gce/kernel/kernel/time/hrtimer.c:1600 __do_softirq+0x1a9/0x6fa syzkaller/managers/upstream-kmsan-gce/kernel/kernel/softirq.c:298 =====================================================