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BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0x106a/0x1240
Read of size 1 at addr ffff88803115ffff by task syz-executor/5848

CPU: 0 UID: 0 PID: 5848 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 mcp2221_raw_event+0x106a/0x1240
 hid_input_report+0x40a/0x520
 hid_irq_in+0x47e/0x6d0
 __usb_hcd_giveback_urb+0x376/0x540
 dummy_timer+0x862/0x4550
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 bf 0e ef 09 e8 aa 4f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90003327938 EFLAGS: 00000282
RAX: eb0177e690194900 RBX: 0000000000000000 RCX: eb0177e690194900
RDX: 0000000000000000 RSI: ffffffff8dbbc9d5 RDI: ffffffff8c037100
RBP: ffffc90003327990 R08: ffffffff8fc3eb37 R09: 1ffffffff1f87d66
R10: dffffc0000000000 R11: fffffbfff1f87d67 R12: ffff8881059d1cc0
R13: dffffc0000000000 R14: ffff88801f18b980 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 schedule+0x165/0x360
 do_nanosleep+0x1c7/0x600
 hrtimer_nanosleep+0x169/0x360
 __se_sys_clock_nanosleep+0x2f1/0x380
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efe225c14a5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007fff22f77830 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00007efe225c14a5
RDX: 00007fff22f77870 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff22f778dc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 000000000001241e R15: 00007fff22f77930
 </TASK>

Allocated by task 5908:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_node_track_caller_noprof+0x568/0x800
 kmalloc_reserve+0x136/0x290
 __alloc_skb+0x142/0x2d0
 mld_newpack+0x13c/0xc40
 add_grhead+0x5a/0x2a0
 add_grec+0x1452/0x1740
 mld_send_initial_cr+0x288/0x550
 ipv6_mc_dad_complete+0x88/0x410
 addrconf_dad_completed+0x6d5/0xd60
 addrconf_dad_work+0xc36/0x14b0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x47f/0x820
 ret_from_fork_asm+0x1a/0x30

Freed by task 5908:
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x199/0x6d0
 skb_release_data+0x62d/0x7c0
 sk_skb_reason_drop+0x127/0x170
 ip_tunnel_xmit+0xe76/0x2390
 __gre_xmit+0x19a/0x240
 erspan_xmit+0xa04/0x1220
 dev_hard_start_xmit+0x2d7/0x830
 sch_direct_xmit+0x241/0x4b0
 __dev_queue_xmit+0x1857/0x3b50
 ip6_finish_output2+0xf70/0x1480
 ip6_output+0x340/0x550
 NF_HOOK+0x9e/0x380
 mld_sendpack+0x8d4/0xe60
 ipv6_mc_dad_complete+0x88/0x410
 addrconf_dad_completed+0x6d5/0xd60
 addrconf_dad_work+0xc36/0x14b0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x47f/0x820
 ret_from_fork_asm+0x1a/0x30

The buggy address belongs to the object at ffff88803115f000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 2047 bytes to the right of
 allocated 2048-byte region [ffff88803115f000, ffff88803115f800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88803115a000 pfn:0x31158
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801a842000 ffffea0000c5c410 ffffea00007ff410
raw: ffff88803115a000 0000000000080003 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801a842000 ffffea0000c5c410 ffffea00007ff410
head: ffff88803115a000 0000000000080003 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000c45601 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5847, tgid 5847 (syz-executor), ts 65358012685, free_ts 0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x330
 ___slab_alloc+0xbd1/0x13f0
 __slab_alloc+0x55/0xa0
 __kmalloc_node_track_caller_noprof+0x5c7/0x800
 kmalloc_reserve+0x136/0x290
 pskb_expand_head+0x18e/0x1150
 netlink_trim+0x1d5/0x2e0
 netlink_broadcast_filtered+0xd6/0x1000
 nlmsg_notify+0xf0/0x1a0
 __dev_notify_flags+0xf4/0x2e0
 rtnl_newlink_create+0x61c/0xb00
 rtnl_newlink+0x16d6/0x1c70
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88803115fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803115ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803115ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff888031160000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888031160080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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