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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+0x1b8/0x1c0 security/selinux/hooks.c:5746
Read of size 8 at addr ffff8880666985f0 by task kworker/u8:1/12

CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: krdsd rds_tcp_accept_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xc7/0x130 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 selinux_sock security/selinux/include/objsec.h:207 [inline]
 selinux_ip_output+0x1b8/0x1c0 security/selinux/hooks.c:5746
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xbb/0x1f0 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 __ip_local_out+0x428/0x710 net/ipv4/ip_output.c:119
 ip_local_out net/ipv4/ip_output.c:128 [inline]
 ip_send_skb net/ipv4/ip_output.c:1505 [inline]
 ip_push_pending_frames+0x9b/0x4d0 net/ipv4/ip_output.c:1525
 ip_send_unicast_reply+0xe14/0x13e0 net/ipv4/ip_output.c:1672
 tcp_v4_send_ack+0x8c9/0x1150 net/ipv4/tcp_ipv4.c:1024
 tcp_v4_timewait_ack net/ipv4/tcp_ipv4.c:1076 [inline]
 tcp_v4_rcv+0x3116/0x4530 net/ipv4/tcp_ipv4.c:2427
 ip_protocol_deliver_rcu+0x6e/0x400 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2c7/0x3f0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_local_deliver+0x1be/0x360 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:460 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_rcv+0x400/0x6a0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5668
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5781
 process_backlog+0x288/0xd40 net/core/dev.c:6113
 __napi_poll+0xbb/0x6d0 net/core/dev.c:6777
 napi_poll net/core/dev.c:6846 [inline]
 net_rx_action+0xa37/0xf80 net/core/dev.c:6968
 handle_softirqs+0x248/0x660 kernel/softirq.c:554
 do_softirq kernel/softirq.c:455 [inline]
 do_softirq+0x7a/0xa0 kernel/softirq.c:442
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x60/0x70 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+0xba2/0x3a20 net/core/dev.c:4457
 dev_queue_xmit include/linux/netdevice.h:3122 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip_finish_output2+0xbc7/0x1a60 net/ipv4/ip_output.c:236
 __ip_finish_output.part.0+0x1bf/0x360 net/ipv4/ip_output.c:314
 __ip_finish_output include/net/dst.h:450 [inline]
 ip_finish_output net/ipv4/ip_output.c:324 [inline]
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip_output+0x2b5/0xa10 net/ipv4/ip_output.c:434
 dst_output include/net/dst.h:450 [inline]
 ip_local_out net/ipv4/ip_output.c:130 [inline]
 __ip_queue_xmit+0x1792/0x1d60 net/ipv4/ip_output.c:536
 __tcp_transmit_skb+0x2d34/0x3ab0 net/ipv4/tcp_output.c:1466
 tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
 tcp_write_xmit+0x101f/0x7610 net/ipv4/tcp_output.c:2827
 __tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:3012
 tcp_send_fin+0x154/0xc70 net/ipv4/tcp_output.c:3618
 __tcp_close+0x94c/0xed0 net/ipv4/tcp.c:3130
 tcp_close+0x28/0x120 net/ipv4/tcp.c:3221
 inet_release+0xea/0x200 net/ipv4/af_inet.c:437
 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:489
 __sock_release net/socket.c:658 [inline]
 sock_release+0x8e/0x1d0 net/socket.c:686
 rds_tcp_accept_one+0x348/0xcf0 net/rds/tcp_listen.c:234
 rds_tcp_accept_worker+0x46/0x70 net/rds/tcp.c:531
 process_one_work+0x8a9/0x18a0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x86d/0x1110 kernel/workqueue.c:3391
 kthread+0x2a6/0x380 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

The buggy address belongs to the object at ffff888066698580
 which belongs to the cache tw_sock_TCP of size 288
The buggy address is located 112 bytes inside of
 allocated 288-byte region [ffff888066698580, ffff8880666986a0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x66698
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88801d1b6901
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888014aa3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080170017 00000001f5000000 ffff88801d1b6901
head: 00fff00000000040 ffff888014aa3dc0 dead000000000122 0000000000000000
head: 0000000000000000 0000000080170017 00000001f5000000 ffff88801d1b6901
head: 00fff00000000001 ffffea000199a601 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 4693, tgid 4691 (syz-execprog), ts 48388902073, free_ts 48387971279
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x283/0x300 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0xff0/0x3a40 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x1cf/0x4a0 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x2c9/0x5f0 mm/mempolicy.c:2265
 alloc_slab_page mm/slub.c:2412 [inline]
 allocate_slab+0x280/0x390 mm/slub.c:2578
 new_slab mm/slub.c:2631 [inline]
 ___slab_alloc+0xc2a/0x13f0 mm/slub.c:3818
 __slab_alloc.constprop.0+0x4d/0x90 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 kmem_cache_alloc_noprof+0x30c/0x350 mm/slub.c:4141
 inet_twsk_alloc+0x120/0x970 net/ipv4/inet_timewait_sock.c:188
 tcp_time_wait+0x5a/0xd70 net/ipv4/tcp_minisocks.c:309
 tcp_fin+0x442/0x670 net/ipv4/tcp_input.c:4604
 tcp_data_queue+0x1f9f/0x4dc0 net/ipv4/tcp_input.c:5290
 tcp_rcv_state_process+0x193a/0x4db0 net/ipv4/tcp_input.c:6972
 tcp_v4_do_rcv+0x397/0xac0 net/ipv4/tcp_ipv4.c:1938
 tcp_v4_rcv+0x34e9/0x4530 net/ipv4/tcp_ipv4.c:2350
 ip_protocol_deliver_rcu+0x6e/0x400 net/ipv4/ip_input.c:205
page last free pid 1 tgid 1 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0x687/0xe60 mm/page_alloc.c:2638
 mm_free_pgd kernel/fork.c:803 [inline]
 __mmdrop+0x59/0x370 kernel/fork.c:919
 mmdrop include/linux/sched/mm.h:55 [inline]
 mmdrop_sched include/linux/sched/mm.h:83 [inline]
 mmdrop_lazy_tlb_sched include/linux/sched/mm.h:110 [inline]
 finish_task_switch.isra.0+0x569/0x7b0 kernel/sched/core.c:5221
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x10ee/0x4f40 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x7c/0x2c0 kernel/sched/core.c:6774
 schedule_hrtimeout_range_clock+0x2f5/0x320 kernel/time/hrtimer.c:2272
 do_sigtimedwait+0x3ee/0x560 kernel/signal.c:3665
 __do_sys_rt_sigtimedwait kernel/signal.c:3709 [inline]
 __se_sys_rt_sigtimedwait kernel/signal.c:3687 [inline]
 __x64_sys_rt_sigtimedwait+0x1ec/0x2e0 kernel/signal.c:3687
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x1a0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888066698480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888066698500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888066698580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff888066698600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888066698680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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