==================================================================
BUG: KASAN: slab-out-of-bounds in decode_session6+0xe6d/0x1530 net/xfrm/xfrm_policy.c:3369
Read of size 1 at addr ffff888083b98dbd by task kworker/u4:3/6785

CPU: 1 PID: 6785 Comm: kworker/u4:3 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247
 __kasan_report mm/kasan/report.c:433 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:450
 decode_session6+0xe6d/0x1530 net/xfrm/xfrm_policy.c:3369
 __xfrm_decode_session+0x50/0xb0 net/xfrm/xfrm_policy.c:3456
 xfrm_decode_session include/net/xfrm.h:1149 [inline]
 vti_tunnel_xmit+0x26d/0x1b80 net/ipv4/ip_vti.c:294
 __netdev_start_xmit include/linux/netdevice.h:4987 [inline]
 netdev_start_xmit include/linux/netdevice.h:5001 [inline]
 xmit_one net/core/dev.c:3590 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3606
 sch_direct_xmit+0x19f/0xbc0 net/sched/sch_generic.c:342
 qdisc_restart net/sched/sch_generic.c:407 [inline]
 __qdisc_run+0x4bc/0x1700 net/sched/sch_generic.c:415
 __dev_xmit_skb net/core/dev.c:3875 [inline]
 __dev_queue_xmit+0x2091/0x3630 net/core/dev.c:4194
 neigh_connected_output+0x3b6/0x510 net/core/neighbour.c:1552
 neigh_output include/net/neighbour.h:527 [inline]
 ip6_finish_output2+0x571/0x14e0 net/ipv6/ip6_output.c:126
 __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]
 __ip6_finish_output+0x4c1/0x1050 net/ipv6/ip6_output.c:170
 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224
 dst_output include/net/dst.h:450 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3898
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5605
Code: c6 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000295fba0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200052bf76 RCX: 8baa2ebf946311f3
RDX: 1ffff11002fbd4eb RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff76a07
R10: fffffbfff1feed40 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bb83b60 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
 rcu_read_lock include/linux/rcupdate.h:688 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Allocated by task 15643:
 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 ____kasan_kmalloc mm/kasan/common.c:472 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522
 kmalloc include/linux/slab.h:590 [inline]
 kzalloc include/linux/slab.h:724 [inline]
 copy_verifier_state+0x827/0xb80 kernel/bpf/verifier.c:966
 is_state_visited kernel/bpf/verifier.c:10987 [inline]
 do_check kernel/bpf/verifier.c:11106 [inline]
 do_check_common+0x1b71/0xc8e0 kernel/bpf/verifier.c:13382
 do_check_main kernel/bpf/verifier.c:13445 [inline]
 bpf_check+0x7389/0xbef0 kernel/bpf/verifier.c:14012
 bpf_prog_load+0xf4c/0x21e0 kernel/bpf/syscall.c:2343
 __sys_bpf+0x674/0x5980 kernel/bpf/syscall.c:4633
 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4735 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4735
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 15643:
 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free mm/kasan/common.c:328 [inline]
 __kasan_slab_free+0xff/0x130 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:1723 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749
 slab_free mm/slub.c:3513 [inline]
 kfree+0xf6/0x560 mm/slub.c:4561
 free_func_state kernel/bpf/verifier.c:899 [inline]
 free_func_state kernel/bpf/verifier.c:893 [inline]
 free_verifier_state+0xc4/0x250 kernel/bpf/verifier.c:915
 free_states kernel/bpf/verifier.c:13297 [inline]
 do_check_common+0x140f/0xc8e0 kernel/bpf/verifier.c:13394
 do_check_main kernel/bpf/verifier.c:13445 [inline]
 bpf_check+0x7389/0xbef0 kernel/bpf/verifier.c:14012
 bpf_prog_load+0xf4c/0x21e0 kernel/bpf/syscall.c:2343
 __sys_bpf+0x674/0x5980 kernel/bpf/syscall.c:4633
 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4735 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4735
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff888083b98000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1469 bytes to the right of
 2048-byte region [ffff888083b98000, ffff888083b98800)
The buggy address belongs to the page:
page:ffffea00020ee600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x83b98
head:ffffea00020ee600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0002218a00 dead000000000002 ffff888010c42000
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8125, ts 2219517964611, free_ts 2219265568008
 prep_new_page mm/page_alloc.c:2418 [inline]
 get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369
 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
 alloc_slab_page mm/slub.c:1793 [inline]
 allocate_slab mm/slub.c:1930 [inline]
 new_slab+0x32d/0x4a0 mm/slub.c:1993
 ___slab_alloc+0x918/0xfe0 mm/slub.c:3022
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109
 slab_alloc_node mm/slub.c:3200 [inline]
 __kmalloc_node_track_caller+0x2cb/0x360 mm/slub.c:4956
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 pskb_expand_head+0x15e/0x1060 net/core/skbuff.c:1701
 netlink_trim+0x1ea/0x240 net/netlink/af_netlink.c:1301
 netlink_broadcast+0x5b/0xd50 net/netlink/af_netlink.c:1497
 nlmsg_multicast include/net/netlink.h:1033 [inline]
 nlmsg_notify+0x8f/0x280 net/netlink/af_netlink.c:2534
 rtnl_notify net/core/rtnetlink.c:730 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:3832 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:3847 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:3835 [inline]
 rtnetlink_event+0x193/0x1d0 net/core/rtnetlink.c:5622
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2002
 call_netdevice_notifiers_mtu net/core/dev.c:2051 [inline]
 dev_set_mtu_ext+0x39d/0x5b0 net/core/dev.c:8935
 dev_set_mtu+0x8e/0x120 net/core/dev.c:8956
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1338 [inline]
 free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389
 free_unref_page_prepare mm/page_alloc.c:3309 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3388
 __unfreeze_partials+0x343/0x360 mm/slub.c:2527
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:259 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:3234 [inline]
 slab_alloc mm/slub.c:3242 [inline]
 kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247
 kmem_cache_zalloc include/linux/slab.h:714 [inline]
 __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:585
 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:647
 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:985
 sysfs_add_file_mode_ns+0x20f/0x3f0 fs/sysfs/file.c:294
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x322/0xb10 fs/sysfs/group.c:148
 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188
 internal_create_groups fs/sysfs/group.c:184 [inline]
 sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:214
 setup_gid_attrs drivers/infiniband/core/sysfs.c:1168 [inline]
 ib_setup_port_attrs+0x3e7/0x5c0 drivers/infiniband/core/sysfs.c:1440
 add_one_compat_dev+0x517/0x7f0 drivers/infiniband/core/device.c:968

Memory state around the buggy address:
 ffff888083b98c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888083b98d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888083b98d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                        ^
 ffff888083b98e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888083b98e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	a5                   	movsl  %ds:(%rsi),%es:(%rdi)
   1:	7e 83                	jle    0xffffff86
   3:	f8                   	clc
   4:	01 0f                	add    %ecx,(%rdi)
   6:	85 b4 02 00 00 9c 58 	test   %esi,0x589c0000(%rdx,%rax,1)
   d:	f6 c4 02             	test   $0x2,%ah
  10:	0f 85 9f 02 00 00    	jne    0x2b5
  16:	48 83 7c 24 08 00    	cmpq   $0x0,0x8(%rsp)
  1c:	74 01                	je     0x1f
  1e:	fb                   	sti
  1f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  26:	fc ff df
* 29:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2c:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  33:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3a:	00
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	84                   	.byte 0x84
  3e:	24                   	.byte 0x24