protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
==================================================================
BUG: KMSAN: uninit-value in __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline]
BUG: KMSAN: uninit-value in __fswab32 include/uapi/linux/swab.h:59 [inline]
BUG: KMSAN: uninit-value in erspan_rcv net/ipv4/ip_gre.c:282 [inline]
BUG: KMSAN: uninit-value in gre_rcv+0x11a0/0x1900 net/ipv4/ip_gre.c:422
CPU: 1 PID: 28358 Comm: syz-executor0 Not tainted 4.20.0-rc7+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:613
 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
 __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline]
 __fswab32 include/uapi/linux/swab.h:59 [inline]
 erspan_rcv net/ipv4/ip_gre.c:282 [inline]
 gre_rcv+0x11a0/0x1900 net/ipv4/ip_gre.c:422
 gre_rcv+0x2e6/0x3c0 net/ipv4/gre_demux.c:143
 ip_local_deliver_finish+0x7a2/0xea0 net/ipv4/ip_input.c:215
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_local_deliver+0x44b/0x510 net/ipv4/ip_input.c:256
 dst_input include/net/dst.h:450 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:415 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_rcv+0x6b6/0x740 net/ipv4/ip_input.c:524
 __netif_receive_skb_one_core net/core/dev.c:4946 [inline]
 __netif_receive_skb net/core/dev.c:5056 [inline]
 process_backlog+0x766/0x10f0 net/core/dev.c:5864
 napi_poll net/core/dev.c:6287 [inline]
 net_rx_action+0x78b/0x1a60 net/core/dev.c:6353
 __do_softirq+0x53f/0x93a kernel/softirq.c:293
 do_softirq_own_stack+0x49/0x80 arch/x86/entry/entry_64.S:1039
 </IRQ>
 do_softirq kernel/softirq.c:338 [inline]
 __local_bh_enable_ip+0x16f/0x1a0 kernel/softirq.c:190
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:696 [inline]
 ip_finish_output2+0x1627/0x1830 net/ipv4/ip_output.c:231
 ip_finish_output+0xd2d/0xfd0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip_mc_output+0x117a/0x1700 net/ipv4/ip_output.c:390
 dst_output include/net/dst.h:444 [inline]
 ip_local_out net/ipv4/ip_output.c:124 [inline]
 __ip_queue_xmit+0x1b67/0x20f0 net/ipv4/ip_output.c:505
 sctp_v4_xmit+0x252/0x2f0 net/sctp/protocol.c:991
 sctp_packet_transmit+0x3ee5/0x43b0 net/sctp/output.c:641
 sctp_packet_singleton net/sctp/outqueue.c:787 [inline]
 sctp_outq_flush_ctrl net/sctp/outqueue.c:918 [inline]
 sctp_outq_flush+0x9b8/0x5cd0 net/sctp/outqueue.c:1200
 sctp_outq_uncork+0xd0/0xf0 net/sctp/outqueue.c:772
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline]
 sctp_do_sm+0x952b/0x9af0 net/sctp/sm_sideeffect.c:1191
 sctp_primitive_ASSOCIATE+0x172/0x1a0 net/sctp/primitive.c:88
 __sctp_connect+0x17bf/0x1c20 net/sctp/socket.c:1226
 sctp_connect net/sctp/socket.c:4516 [inline]
 sctp_inet_connect+0x402/0x520 net/sctp/socket.c:4532
 __sys_connect+0x664/0x820 net/socket.c:1664
 __do_sys_connect net/socket.c:1675 [inline]
 __se_sys_connect+0x8d/0xb0 net/socket.c:1672
 __x64_sys_connect+0x4a/0x70 net/socket.c:1672
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457ec9
Code: 6d 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4a347f1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
kvm [28354]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0x186 data 0x1006dd86
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
RDX: 000000000000001c RSI: 0000000020000040 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4a347f26d4
R13: 00000000004be317 R14: 00000000004ce6f0 R15: 00000000ffffffff

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline]
 kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:158
 kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176
 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:185
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2759 [inline]
 __kmalloc_node_track_caller+0xe18/0x1030 mm/slub.c:4383
 __kmalloc_reserve net/core/skbuff.c:137 [inline]
 __alloc_skb+0x309/0xa20 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:998 [inline]
 sctp_packet_transmit+0x46a/0x43b0 net/sctp/output.c:584
 sctp_packet_singleton net/sctp/outqueue.c:787 [inline]
 sctp_outq_flush_ctrl net/sctp/outqueue.c:918 [inline]
 sctp_outq_flush+0x9b8/0x5cd0 net/sctp/outqueue.c:1200
 sctp_outq_uncork+0xd0/0xf0 net/sctp/outqueue.c:772
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline]
 sctp_do_sm+0x952b/0x9af0 net/sctp/sm_sideeffect.c:1191
 sctp_primitive_ASSOCIATE+0x172/0x1a0 net/sctp/primitive.c:88
 __sctp_connect+0x17bf/0x1c20 net/sctp/socket.c:1226
 sctp_connect net/sctp/socket.c:4516 [inline]
 sctp_inet_connect+0x402/0x520 net/sctp/socket.c:4532
 __sys_connect+0x664/0x820 net/socket.c:1664
 __do_sys_connect net/socket.c:1675 [inline]
 __se_sys_connect+0x8d/0xb0 net/socket.c:1672
 __x64_sys_connect+0x4a/0x70 net/socket.c:1672
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
==================================================================