==================================================================
BUG: KASAN: slab-out-of-bounds in selinux_sock security/selinux/include/objsec.h:207 [inline]
BUG: KASAN: slab-out-of-bounds in selinux_ip_output+0x1e0/0x1f0 security/selinux/hooks.c:5761
Read of size 8 at addr ffff8880329285f8 by task syz.0.608/9350

CPU: 1 UID: 0 PID: 9350 Comm: syz.0.608 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 selinux_sock security/selinux/include/objsec.h:207 [inline]
 selinux_ip_output+0x1e0/0x1f0 security/selinux/hooks.c:5761
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269
 NF_HOOK include/linux/netfilter.h:312 [inline]
 ip6_xmit+0xd44/0x2130 net/ipv6/ip6_output.c:366
 tcp_v6_send_response+0x11d9/0x25e0 net/ipv6/tcp_ipv6.c:999
 tcp_v6_send_reset+0x636/0x1590 net/ipv6/tcp_ipv6.c:1135
 tcp_v6_rcv+0x311f/0x3fd0 net/ipv6/tcp_ipv6.c:1996
 ip6_protocol_deliver_rcu+0x180/0x1510 net/ipv6/ip6_input.c:436
 ip6_input_finish+0x14f/0x2f0 net/ipv6/ip6_input.c:481
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip6_input+0xa1/0xd0 net/ipv6/ip6_input.c:490
 dst_input include/net/dst.h:460 [inline]
 ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ipv6_rcv+0x265/0x680 net/ipv6/ip6_input.c:309
 __netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5672
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5785
 process_backlog+0x443/0x15f0 net/core/dev.c:6117
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6877
 napi_poll net/core/dev.c:6946 [inline]
 net_rx_action+0xa94/0x1010 net/core/dev.c:7068
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
 do_softirq kernel/softirq.c:455 [inline]
 do_softirq+0xb2/0xf0 kernel/softirq.c:442
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
 __dev_queue_xmit+0x8b0/0x43e0 net/core/dev.c:4461
 dev_queue_xmit include/linux/netdevice.h:3168 [inline]
 neigh_hh_output include/net/neighbour.h:523 [inline]
 neigh_output include/net/neighbour.h:537 [inline]
 ip6_finish_output2+0x1801/0x2070 net/ipv6/ip6_output.c:141
 __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
 ip6_finish_output+0x3f9/0x1360 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247
 dst_output include/net/dst.h:450 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip6_xmit+0x1234/0x2130 net/ipv6/ip6_output.c:366
 inet6_csk_xmit+0x3ce/0x740 net/ipv6/inet6_connection_sock.c:135
 __tcp_transmit_skb+0x1b02/0x3df0 net/ipv4/tcp_output.c:1466
 tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
 tcp_write_xmit+0x12b1/0x8560 net/ipv4/tcp_output.c:2827
 __tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:3010
 tcp_push+0x221/0x6f0 net/ipv4/tcp.c:751
 mptcp_push_release.isra.0+0xa8/0xe0 net/mptcp/protocol.c:1503
 __mptcp_push_pending+0x400/0x560 net/mptcp/protocol.c:1643
 mptcp_sendmsg+0x1960/0x1f20 net/mptcp/protocol.c:1928
 inet6_sendmsg+0x119/0x140 net/ipv6/af_inet6.c:659
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg net/socket.c:726 [inline]
 ____sys_sendmsg+0x68c/0xc90 net/socket.c:2583
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 __sys_sendmmsg+0x201/0x420 net/socket.c:2726
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2750
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f142517e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1425e93038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f1425336080 RCX: 00007f142517e819
RDX: 0000000000000001 RSI: 0000000020000500 RDI: 0000000000000003
RBP: 00007f14251f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000890 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1425336080 R15: 00007fff75a37d98
 </TASK>

The buggy address belongs to the object at ffff888032928580
 which belongs to the cache tw_sock_TCPv6 of size 288
The buggy address is located 120 bytes inside of
 allocated 288-byte region [ffff888032928580, ffff8880329286a0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32928
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888029bf5b01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88814d1bd280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080170017 00000001f5000000 ffff888029bf5b01
head: 00fff00000000040 ffff88814d1bd280 dead000000000122 0000000000000000
head: 0000000000000000 0000000080170017 00000001f5000000 ffff888029bf5b01
head: 00fff00000000001 ffffea0000ca4a01 ffffffffffffffff 0000000000000000
head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 9011, tgid 9010 (syz.0.556), ts 465175411595, free_ts 456977329284
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474
 __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4751
 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
 alloc_slab_page mm/slub.c:2412 [inline]
 allocate_slab mm/slub.c:2578 [inline]
 new_slab+0x2c9/0x410 mm/slub.c:2631
 ___slab_alloc+0xdac/0x1880 mm/slub.c:3818
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 kmem_cache_alloc_noprof+0x2a7/0x2f0 mm/slub.c:4141
 inet_twsk_alloc+0x120/0x970 net/ipv4/inet_timewait_sock.c:188
 tcp_time_wait+0x5f/0xe10 net/ipv4/tcp_minisocks.c:309
 tcp_rcv_state_process+0x1fda/0x4c40 net/ipv4/tcp_input.c:6925
 tcp_v6_do_rcv+0x492/0x1730 net/ipv6/tcp_ipv6.c:1667
 sk_backlog_rcv include/net/sock.h:1121 [inline]
 __release_sock+0x14c/0x400 net/core/sock.c:3083
 release_sock+0x5a/0x220 net/core/sock.c:3637
 mptcp_check_send_data_fin+0x24a/0x450 net/mptcp/protocol.c:3018
 mptcp_shutdown net/mptcp/protocol.c:3675 [inline]
 mptcp_shutdown+0xde/0x110 net/mptcp/protocol.c:3670
page last free pid 8871 tgid 8871 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0x661/0x1080 mm/page_alloc.c:2657
 vfree+0x17a/0x890 mm/vmalloc.c:3382
 snd_dma_free_pages+0x51/0x70 sound/core/memalloc.c:132
 do_free_pages sound/core/pcm_memory.c:88 [inline]
 do_free_pages sound/core/pcm_memory.c:83 [inline]
 snd_pcm_lib_free_pages+0x172/0x390 sound/core/pcm_memory.c:495
 do_hw_free sound/core/pcm_native.c:894 [inline]
 snd_pcm_release_substream.part.0+0x2a8/0x340 sound/core/pcm_native.c:2718
 snd_pcm_release_substream+0x5b/0x70 sound/core/pcm_native.c:2712
 snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2398 [inline]
 snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2390 [inline]
 snd_pcm_oss_release+0x16f/0x310 sound/core/oss/pcm_oss.c:2577
 __fput+0x3f8/0xb60 fs/file_table.c:450
 task_work_run+0x14e/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888032928480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888032928500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888032928580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff888032928600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888032928680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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