syzbot

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BUG: KMSAN: uninit-value in sctp_inq_pop+0x15c8/0x18f0 net/sctp/inqueue.c:205
 sctp_inq_pop+0x15c8/0x18f0 net/sctp/inqueue.c:205
 sctp_assoc_bh_rcv+0x201/0xdd0 net/sctp/associola.c:1000
 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x38e/0x10c0 net/sctp/input.c:344
 sk_backlog_rcv include/net/sock.h:1051 [inline]
 __release_sock+0x256/0x640 net/core/sock.c:2794
 release_sock+0x98/0x2e0 net/core/sock.c:3327
 sctp_wait_for_connect+0x52a/0x9e0 net/sctp/socket.c:9316
 sctp_sendmsg_to_asoc+0x1c32/0x1f50 net/sctp/socket.c:1881
 sctp_sendmsg+0x3eac/0x5460 net/sctp/socket.c:2027
 inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x9ef/0xc70 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0x19c/0x210 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x51/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was stored to memory at:
 sctp_inq_pop+0x155c/0x18f0 net/sctp/inqueue.c:201
 sctp_assoc_bh_rcv+0x201/0xdd0 net/sctp/associola.c:1000
 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x38e/0x10c0 net/sctp/input.c:344
 sk_backlog_rcv include/net/sock.h:1051 [inline]
 __release_sock+0x256/0x640 net/core/sock.c:2794
 release_sock+0x98/0x2e0 net/core/sock.c:3327
 sctp_wait_for_connect+0x52a/0x9e0 net/sctp/socket.c:9316
 sctp_sendmsg_to_asoc+0x1c32/0x1f50 net/sctp/socket.c:1881
 sctp_sendmsg+0x3eac/0x5460 net/sctp/socket.c:2027
 inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x9ef/0xc70 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0x19c/0x210 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x51/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:754 [inline]
 slab_alloc_node mm/slub.c:3231 [inline]
 __kmalloc_node_track_caller+0xde3/0x14f0 mm/slub.c:4962
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x545/0xf90 net/core/skbuff.c:426
 alloc_skb include/linux/skbuff.h:1300 [inline]
 sctp_packet_pack net/sctp/output.c:471 [inline]
 sctp_packet_transmit+0x1956/0x45b0 net/sctp/output.c:620
 sctp_outq_flush_transports net/sctp/outqueue.c:1170 [inline]
 sctp_outq_flush+0x1a36/0x6030 net/sctp/outqueue.c:1218
 sctp_outq_uncork+0x105/0x120 net/sctp/outqueue.c:761
 sctp_side_effects net/sctp/sm_sideeffect.c:1195 [inline]
 sctp_do_sm+0x946f/0x9b50 net/sctp/sm_sideeffect.c:1166
 sctp_assoc_bh_rcv+0xa13/0xdd0 net/sctp/associola.c:1054
 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x38e/0x10c0 net/sctp/input.c:344
 sk_backlog_rcv include/net/sock.h:1051 [inline]
 __release_sock+0x256/0x640 net/core/sock.c:2794
 release_sock+0x98/0x2e0 net/core/sock.c:3327
 sctp_wait_for_connect+0x52a/0x9e0 net/sctp/socket.c:9316
 sctp_sendmsg_to_asoc+0x1c32/0x1f50 net/sctp/socket.c:1881
 sctp_sendmsg+0x3eac/0x5460 net/sctp/socket.c:2027
 inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x9ef/0xc70 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0x19c/0x210 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x51/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x44/0xae

CPU: 0 PID: 3476 Comm: syz-executor106 Not tainted 5.18.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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