==================================================================
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 ffff8880239be498 by task kworker/u32:2/45

CPU: 1 UID: 0 PID: 45 Comm: kworker/u32:2 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: bat_events batadv_nc_worker
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+0x386/0x6d0 include/linux/netfilter.h:269
 __ip_local_out+0x339/0x640 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+0xa0/0x5b0 net/ipv4/ip_output.c:1525
 ip_send_unicast_reply+0xd0e/0x1650 net/ipv4/ip_output.c:1672
 tcp_v4_send_reset+0x129b/0x2f20 net/ipv4/tcp_ipv4.c:910
 tcp_v4_rcv+0x371d/0x4390 net/ipv4/tcp_ipv4.c:2431
 ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x316/0x570 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+0x18e/0x1f0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:460 [inline]
 ip_sublist_rcv_finish+0x2c1/0x620 net/ipv4/ip_input.c:578
 ip_list_rcv_finish.constprop.0+0x559/0x720 net/ipv4/ip_input.c:628
 ip_sublist_rcv net/ipv4/ip_input.c:636 [inline]
 ip_list_rcv+0x339/0x450 net/ipv4/ip_input.c:670
 __netif_receive_skb_list_ptype net/core/dev.c:5715 [inline]
 __netif_receive_skb_list_core+0x755/0x950 net/core/dev.c:5762
 __netif_receive_skb_list net/core/dev.c:5814 [inline]
 netif_receive_skb_list_internal+0x753/0xdb0 net/core/dev.c:5905
 gro_normal_list include/net/gro.h:515 [inline]
 gro_normal_list include/net/gro.h:511 [inline]
 napi_complete_done+0x218/0x940 net/core/dev.c:6256
 e1000_clean+0xa28/0x2700 drivers/net/ethernet/intel/e1000/e1000_main.c:3815
 __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:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:655
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
 common_interrupt+0xbf/0xe0 arch/x86/kernel/irq.c:278
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:__rcu_read_lock+0xbe/0xf0 kernel/rcu/tree_plugin.h:415
Code: 7e 48 8d bb 44 04 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1f 8b 83 44 04 00 00 <3d> ff ff ff 3f 7f 07 5b 5d c3 cc cc cc cc 90 0f 0b 90 5b 5d c3 cc
RSP: 0018:ffffc900007d7b08 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff88801fd82440 RCX: ffff88801bf406c0
RDX: 0000000000000000 RSI: ffffffff8af2369d RDI: ffff88801fd82884
RBP: ffff88801fd82440 R08: 0000000000000004 R09: 0000000000000080
R10: 0000000000000052 R11: 0000000000000002 R12: dffffc0000000000
R13: ffff88804db398a8 R14: 0000000000000052 R15: ffffffff8af22d50
 rcu_read_lock include/linux/rcupdate.h:847 [inline]
 batadv_nc_process_nc_paths.part.0+0xc1/0x3e0 net/batman-adv/network-coding.c:687
 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:679 [inline]
 batadv_nc_worker+0xcc8/0x1060 net/batman-adv/network-coding.c:728
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 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 ffff8880239be420
 which belongs to the cache tw_sock_TCP of size 288
The buggy address is located 120 bytes inside of
 allocated 288-byte region [ffff8880239be420, ffff8880239be540)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x239be
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88804b287601
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88810437c640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080170017 00000001f5000000 ffff88804b287601
head: 00fff00000000040 ffff88810437c640 dead000000000122 0000000000000000
head: 0000000000000000 0000000080170017 00000001f5000000 ffff88804b287601
head: 00fff00000000001 ffffea00008e6f81 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 45, tgid 45 (kworker/u32:2), ts 186588626106, free_ts 186574597214
 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+0x4935/0x4c40 net/ipv4/tcp_input.c:6917
 tcp_v4_do_rcv+0x1ad/0xa90 net/ipv4/tcp_ipv4.c:1939
 tcp_v4_rcv+0x33a8/0x4390 net/ipv4/tcp_ipv4.c:2351
 ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x316/0x570 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+0x18e/0x1f0 net/ipv4/ip_input.c:254
page last free pid 5366 tgid 5366 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
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4141
 getname_flags.part.0+0x4c/0x550 fs/namei.c:139
 getname_flags include/linux/audit.h:322 [inline]
 getname+0x8d/0xe0 fs/namei.c:223
 do_sys_openat2+0x104/0x1e0 fs/open.c:1396
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_openat fs/open.c:1433 [inline]
 __se_sys_openat fs/open.c:1428 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1428
 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

Memory state around the buggy address:
 ffff8880239be380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880239be400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880239be480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff8880239be500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880239be580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
vkms_vblank_simulate: vblank timer overrun
----------------
Code disassembly (best guess):
   0:	7e 48                	jle    0x4a
   2:	8d bb 44 04 00 00    	lea    0x444(%rbx),%edi
   8:	48 89 fa             	mov    %rdi,%rdx
   b:	48 c1 ea 03          	shr    $0x3,%rdx
   f:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  13:	48 89 f8             	mov    %rdi,%rax
  16:	83 e0 07             	and    $0x7,%eax
  19:	83 c0 03             	add    $0x3,%eax
  1c:	38 d0                	cmp    %dl,%al
  1e:	7c 04                	jl     0x24
  20:	84 d2                	test   %dl,%dl
  22:	75 1f                	jne    0x43
  24:	8b 83 44 04 00 00    	mov    0x444(%rbx),%eax
* 2a:	3d ff ff ff 3f       	cmp    $0x3fffffff,%eax <-- trapping instruction
  2f:	7f 07                	jg     0x38
  31:	5b                   	pop    %rbx
  32:	5d                   	pop    %rbp
  33:	c3                   	ret
  34:	cc                   	int3
  35:	cc                   	int3
  36:	cc                   	int3
  37:	cc                   	int3
  38:	90                   	nop
  39:	0f 0b                	ud2
  3b:	90                   	nop
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	c3                   	ret
  3f:	cc                   	int3