=====================================================
BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987
 sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987
 sctp_inq_push+0x2a6/0x350 net/sctp/inqueue.c:88
 sctp_rcv+0x3a04/0x3cb0 net/sctp/input.c:243
 sctp6_rcv+0x48/0xc0 net/sctp/ipv6.c:1127
 ip6_protocol_deliver_rcu+0x1c86/0x2c60 net/ipv6/ip6_input.c:438
 ip6_input_finish+0x1f4/0x4a0 net/ipv6/ip6_input.c:489
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ip6_input+0x9c/0x330 net/ipv6/ip6_input.c:500
 dst_input include/net/dst.h:471 [inline]
 ip6_rcv_finish+0x5a1/0x990 net/ipv6/ip6_input.c:79
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ipv6_rcv+0xf1/0x3c0 net/ipv6/ip6_input.c:311
 __netif_receive_skb_one_core net/core/dev.c:5979 [inline]
 __netif_receive_skb+0x1df/0xac0 net/core/dev.c:6092
 process_backlog+0x485/0xa00 net/core/dev.c:6444
 __napi_poll+0xdd/0x8a0 net/core/dev.c:7489
 napi_poll net/core/dev.c:7552 [inline]
 net_rx_action+0xa59/0x1ac0 net/core/dev.c:7679
 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579
 run_ksoftirqd+0x29/0x50 kernel/softirq.c:968
 smpboot_thread_fn+0x56c/0xa30 kernel/smpboot.c:160
 kthread+0xd59/0xf00 kernel/kthread.c:463
 ret_from_fork+0x1e3/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4186 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 __do_kmalloc_node mm/slub.c:4364 [inline]
 __kmalloc_node_track_caller_noprof+0x96d/0x12f0 mm/slub.c:4384
 kmalloc_reserve+0x22f/0x4b0 net/core/skbuff.c:600
 __alloc_skb+0x347/0x7d0 net/core/skbuff.c:669
 alloc_skb include/linux/skbuff.h:1336 [inline]
 sctp_packet_pack net/sctp/output.c:472 [inline]
 sctp_packet_transmit+0x18a1/0x46d0 net/sctp/output.c:621
 sctp_outq_flush_transports net/sctp/outqueue.c:1173 [inline]
 sctp_outq_flush+0x1c7d/0x67c0 net/sctp/outqueue.c:1221
 sctp_outq_uncork+0x9e/0xc0 net/sctp/outqueue.c:764
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:-1 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1204 [inline]
 sctp_do_sm+0x8c8e/0x9720 net/sctp/sm_sideeffect.c:1175
 sctp_assoc_bh_rcv+0x88b/0xbc0 net/sctp/associola.c:1034
 sctp_inq_push+0x2a6/0x350 net/sctp/inqueue.c:88
 sctp_rcv+0x3a04/0x3cb0 net/sctp/input.c:243
 sctp6_rcv+0x48/0xc0 net/sctp/ipv6.c:1127
 ip6_protocol_deliver_rcu+0x1c86/0x2c60 net/ipv6/ip6_input.c:438
 ip6_input_finish+0x1f4/0x4a0 net/ipv6/ip6_input.c:489
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ip6_input+0x9c/0x330 net/ipv6/ip6_input.c:500
 dst_input include/net/dst.h:471 [inline]
 ip6_rcv_finish+0x5a1/0x990 net/ipv6/ip6_input.c:79
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ipv6_rcv+0xf1/0x3c0 net/ipv6/ip6_input.c:311
 __netif_receive_skb_one_core net/core/dev.c:5979 [inline]
 __netif_receive_skb+0x1df/0xac0 net/core/dev.c:6092
 process_backlog+0x485/0xa00 net/core/dev.c:6444
 __napi_poll+0xdd/0x8a0 net/core/dev.c:7489
 napi_poll net/core/dev.c:7552 [inline]
 net_rx_action+0xa59/0x1ac0 net/core/dev.c:7679
 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579
 __do_softirq+0x14/0x1b kernel/softirq.c:613

CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted 6.16.0-syzkaller-12063-g37816488247d #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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