syzbot

netlink: 44 bytes leftover after parsing attributes in process `syz-executor192'.
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BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b3/0x1920 net/sctp/inqueue.c:211
 sctp_inq_pop+0x15b3/0x1920 net/sctp/inqueue.c:211
 sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:997
 sctp_inq_push+0x2ec/0x380 net/sctp/inqueue.c:88
 sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331
 sk_backlog_rcv include/net/sock.h:1092 [inline]
 __release_sock+0x207/0x570 net/core/sock.c:2972
 release_sock+0x6b/0x200 net/core/sock.c:3538
 sctp_wait_for_connect+0x486/0x810 net/sctp/socket.c:9343
 sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 net/sctp/socket.c:1884
 sctp_sendmsg+0x32b4/0x4a70 net/sctp/socket.c:2030
 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:850
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x735/0xa10 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 sctp_inq_pop+0x153a/0x1920 net/sctp/inqueue.c:207
 sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:997
 sctp_inq_push+0x2ec/0x380 net/sctp/inqueue.c:88
 sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331
 sk_backlog_rcv include/net/sock.h:1092 [inline]
 __release_sock+0x207/0x570 net/core/sock.c:2972
 release_sock+0x6b/0x200 net/core/sock.c:3538
 sctp_wait_for_connect+0x486/0x810 net/sctp/socket.c:9343
 sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 net/sctp/socket.c:1884
 sctp_sendmsg+0x32b4/0x4a70 net/sctp/socket.c:2030
 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:850
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x735/0xa10 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3819 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 __do_kmalloc_node mm/slub.c:3980 [inline]
 __kmalloc_node_track_caller+0x705/0x1000 mm/slub.c:4001
 kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582
 __alloc_skb+0x352/0x790 net/core/skbuff.c:651
 alloc_skb include/linux/skbuff.h:1296 [inline]
 sctp_packet_pack net/sctp/output.c:472 [inline]
 sctp_packet_transmit+0x1782/0x4310 net/sctp/output.c:621
 sctp_outq_flush_transports net/sctp/outqueue.c:1173 [inline]
 sctp_outq_flush+0x1b2f/0x6540 net/sctp/outqueue.c:1221
 sctp_outq_uncork+0x9c/0xb0 net/sctp/outqueue.c:764
 sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline]
 sctp_do_sm+0x8c1a/0x9390 net/sctp/sm_sideeffect.c:1169
 sctp_assoc_bh_rcv+0x8fe/0xc50 net/sctp/associola.c:1051
 sctp_inq_push+0x2ec/0x380 net/sctp/inqueue.c:88
 sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331
 sk_backlog_rcv include/net/sock.h:1092 [inline]
 __release_sock+0x207/0x570 net/core/sock.c:2972
 release_sock+0x6b/0x200 net/core/sock.c:3538
 sctp_wait_for_connect+0x486/0x810 net/sctp/socket.c:9343
 sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 net/sctp/socket.c:1884
 sctp_sendmsg+0x32b4/0x4a70 net/sctp/socket.c:2030
 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:850
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x735/0xa10 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 0 PID: 5016 Comm: syz-executor192 Not tainted 6.8.0-rc5-syzkaller-00381-g70ff1fe626a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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