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BUG: KMSAN: uninit-value in sctp_inq_pop+0x15cb/0x1970 net/sctp/inqueue.c:205
CPU: 0 PID: 11 Comm: ksoftirqd/0 Tainted: G        W         5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197
 sctp_inq_pop+0x15cb/0x1970 net/sctp/inqueue.c:205
 sctp_assoc_bh_rcv+0x207/0xe10 net/sctp/associola.c:994
 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80
 sctp_rcv+0x562f/0x60d0 net/sctp/input.c:256
 sctp6_rcv+0x64/0xd0 net/sctp/ipv6.c:1078
 ip6_protocol_deliver_rcu+0x1402/0x25f0 net/ipv6/ip6_input.c:422
 ip6_input_finish net/ipv6/ip6_input.c:463 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip6_input+0x12b/0x390 net/ipv6/ip6_input.c:472
 dst_input include/net/dst.h:458 [inline]
 ip6_rcv_finish+0x5fc/0x7f0 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ipv6_rcv+0x1d1/0x460 net/ipv6/ip6_input.c:297
 __netif_receive_skb_one_core net/core/dev.c:5384 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5498
 process_backlog+0x517/0xbd0 net/core/dev.c:6365
 __napi_poll+0x13e/0xca0 net/core/dev.c:6912
 napi_poll net/core/dev.c:6979 [inline]
 net_rx_action+0x726/0x14a0 net/core/dev.c:7065
 __do_softirq+0x1b9/0x715 kernel/softirq.c:345
 run_ksoftirqd+0x20/0x40 kernel/softirq.c:652
 smpboot_thread_fn+0x5f5/0xa90 kernel/smpboot.c:165
 kthread+0x521/0x560 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x54/0xa0 mm/kmsan/kmsan_instr.c:147
 sctp_inq_pop+0x155b/0x1970 net/sctp/inqueue.c:201
 sctp_assoc_bh_rcv+0x207/0xe10 net/sctp/associola.c:994
 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80
 sctp_rcv+0x562f/0x60d0 net/sctp/input.c:256
 sctp6_rcv+0x64/0xd0 net/sctp/ipv6.c:1078
 ip6_protocol_deliver_rcu+0x1402/0x25f0 net/ipv6/ip6_input.c:422
 ip6_input_finish net/ipv6/ip6_input.c:463 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip6_input+0x12b/0x390 net/ipv6/ip6_input.c:472
 dst_input include/net/dst.h:458 [inline]
 ip6_rcv_finish+0x5fc/0x7f0 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ipv6_rcv+0x1d1/0x460 net/ipv6/ip6_input.c:297
 __netif_receive_skb_one_core net/core/dev.c:5384 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5498
 process_backlog+0x517/0xbd0 net/core/dev.c:6365
 __napi_poll+0x13e/0xca0 net/core/dev.c:6912
 napi_poll net/core/dev.c:6979 [inline]
 net_rx_action+0x726/0x14a0 net/core/dev.c:7065
 __do_softirq+0x1b9/0x715 kernel/softirq.c:345

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2922 [inline]
 __kmalloc_node_track_caller+0xa4f/0x1470 mm/slub.c:4609
 kmalloc_reserve net/core/skbuff.c:353 [inline]
 __alloc_skb+0x4dd/0xe90 net/core/skbuff.c:424
 alloc_skb include/linux/skbuff.h:1103 [inline]
 sctp_packet_pack net/sctp/output.c:442 [inline]
 sctp_packet_transmit+0x17ac/0x44c0 net/sctp/output.c:588
 sctp_packet_transmit_chunk+0x17e/0x280 net/sctp/output.c:192
 sctp_outq_flush_data net/sctp/outqueue.c:1092 [inline]
 sctp_outq_flush+0x261c/0x6510 net/sctp/outqueue.c:1198
 sctp_outq_uncork+0x105/0x120 net/sctp/outqueue.c:758
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1801 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1185 [inline]
 sctp_do_sm+0x9a18/0xa160 net/sctp/sm_sideeffect.c:1156
 sctp_assoc_bh_rcv+0xa3f/0xe10 net/sctp/associola.c:1048
 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80
 sctp_rcv+0x562f/0x60d0 net/sctp/input.c:256
 sctp6_rcv+0x64/0xd0 net/sctp/ipv6.c:1078
 ip6_protocol_deliver_rcu+0x1402/0x25f0 net/ipv6/ip6_input.c:422
 ip6_input_finish net/ipv6/ip6_input.c:463 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip6_input+0x12b/0x390 net/ipv6/ip6_input.c:472
 dst_input include/net/dst.h:458 [inline]
 ip6_rcv_finish+0x5fc/0x7f0 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ipv6_rcv+0x1d1/0x460 net/ipv6/ip6_input.c:297
 __netif_receive_skb_one_core net/core/dev.c:5384 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5498
 process_backlog+0x517/0xbd0 net/core/dev.c:6365
 __napi_poll+0x13e/0xca0 net/core/dev.c:6912
 napi_poll net/core/dev.c:6979 [inline]
 net_rx_action+0x726/0x14a0 net/core/dev.c:7065
 __do_softirq+0x1b9/0x715 kernel/softirq.c:345
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