dccp_parse_options: DCCP(ffff88814b251580): Option 32 (len=7) error=9
==================================================================
BUG: KASAN: use-after-free in dccp_ackvec_runlen net/dccp/ccids/../ackvec.h:43 [inline]
BUG: KASAN: use-after-free in ccid2_hc_tx_packet_recv+0x22a6/0x2610 net/dccp/ccids/ccid2.c:592
Read of size 1 at addr ffff88807eec7494 by task syz-executor154/3609

CPU: 0 PID: 3609 Comm: syz-executor154 Not tainted 6.0.0-syzkaller-02757-gaf7d23f9d96a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
 dccp_ackvec_runlen net/dccp/ccids/../ackvec.h:43 [inline]
 ccid2_hc_tx_packet_recv+0x22a6/0x2610 net/dccp/ccids/ccid2.c:592
 ccid_hc_tx_packet_recv net/dccp/ccid.h:189 [inline]
 dccp_deliver_input_to_ccids+0x1eb/0x260 net/dccp/input.c:182
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x107/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x164/0x1a0 net/dccp/ipv4.c:687
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __release_sock+0x12f/0x3a0 net/core/sock.c:2906
 release_sock+0x54/0x1b0 net/core/sock.c:3462
 dccp_sendmsg+0x697/0xca0 net/dccp/proto.c:785
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:734
 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmmsg+0x18b/0x460 net/socket.c:2622
 __do_sys_sendmmsg net/socket.c:2651 [inline]
 __se_sys_sendmmsg net/socket.c:2648 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2648
 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+0x63/0xcd
RIP: 0033:0x7f54c2c776f9
Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff62afeb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f54c2c776f9
RDX: 04000000000001e6 RSI: 0000000020000c00 RDI: 0000000000000005
RBP: 00007fff62afeb40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007fff62afeb60 R14: 0000000000000003 R15: 0000000000000000
 </TASK>

Allocated by task 3609:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc mm/kasan/common.c:516 [inline]
 ____kasan_kmalloc mm/kasan/common.c:475 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
 kmalloc_reserve net/core/skbuff.c:437 [inline]
 __alloc_skb+0xd9/0x2f0 net/core/skbuff.c:509
 alloc_skb include/linux/skbuff.h:1265 [inline]
 dccp_send_ack.part.0+0x75/0x2f0 net/dccp/output.c:585
 dccp_send_ack+0x53/0x70 net/dccp/output.c:584
 ccid2_hc_rx_packet_recv+0x130/0x1a0 net/dccp/ccids/ccid2.c:771
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xe1/0x260 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x107/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x164/0x1a0 net/dccp/ipv4.c:687
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __sk_receive_skb+0x294/0x820 net/core/sock.c:565
 dccp_v4_rcv+0xfb5/0x18a0 net/dccp/ipv4.c:910
 ip_protocol_deliver_rcu+0x9b/0x7c0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2e8/0x4c0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_local_deliver+0x1aa/0x200 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:455 [inline]
 ip_rcv_finish+0x1cb/0x2f0 net/ipv4/ip_input.c:444
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:564
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5485
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5599
 process_backlog+0x3a0/0x7c0 net/core/dev.c:5927
 __napi_poll+0xb3/0x6d0 net/core/dev.c:6494
 napi_poll net/core/dev.c:6561 [inline]
 net_rx_action+0x9c1/0xd90 net/core/dev.c:6672
 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571

Freed by task 3609:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1759 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
 slab_free mm/slub.c:3539 [inline]
 kfree+0xe2/0x580 mm/slub.c:4567
 skb_free_head+0xac/0x110 net/core/skbuff.c:760
 skb_release_data+0x5f1/0x870 net/core/skbuff.c:789
 skb_release_all net/core/skbuff.c:854 [inline]
 __kfree_skb net/core/skbuff.c:868 [inline]
 kfree_skb_reason+0x14e/0x410 net/core/skbuff.c:891
 kfree_skb include/linux/skbuff.h:1214 [inline]
 dccp_v4_do_rcv+0x13e/0x1a0 net/dccp/ipv4.c:722
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __release_sock+0x12f/0x3a0 net/core/sock.c:2906
 release_sock+0x54/0x1b0 net/core/sock.c:3462
 dccp_sendmsg+0x697/0xca0 net/dccp/proto.c:785
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:734
 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmmsg+0x18b/0x460 net/socket.c:2622
 __do_sys_sendmmsg net/socket.c:2651 [inline]
 __se_sys_sendmmsg net/socket.c:2648 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2648
 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+0x63/0xcd

The buggy address belongs to the object at ffff88807eec7000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1172 bytes inside of
 2048-byte region [ffff88807eec7000, ffff88807eec7800)

The buggy address belongs to the physical page:
page:ffffea0001fbb000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7eec0
head:ffffea0001fbb000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011842000
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 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3609, tgid 3609 (syz-executor154), ts 53112340534, free_ts 53094787553
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549
 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:1829 [inline]
 allocate_slab+0x27e/0x3d0 mm/slub.c:1974
 new_slab mm/slub.c:2034 [inline]
 ___slab_alloc+0x84f/0xe80 mm/slub.c:3036
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123
 slab_alloc_node mm/slub.c:3214 [inline]
 __kmalloc_node_track_caller+0x2f1/0x390 mm/slub.c:4964
 kmalloc_reserve net/core/skbuff.c:437 [inline]
 __alloc_skb+0xd9/0x2f0 net/core/skbuff.c:509
 alloc_skb include/linux/skbuff.h:1265 [inline]
 sock_wmalloc+0xd0/0x120 net/core/sock.c:2568
 dccp_make_response+0x33/0xef0 net/dccp/output.c:413
 dccp_v4_send_response+0x9d/0x670 net/dccp/ipv4.c:515
 dccp_v4_conn_request+0xb47/0x11c0 net/dccp/ipv4.c:667
 dccp_v6_conn_request+0xe30/0x1650 net/dccp/ipv6.c:327
 dccp_rcv_state_process+0x47d/0x1370 net/dccp/input.c:609
 dccp_v4_do_rcv+0x112/0x1a0 net/dccp/ipv4.c:716
 dccp_v6_do_rcv+0x9af/0xc60 net/dccp/ipv6.c:594
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1449 [inline]
 free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499
 free_unref_page_prepare mm/page_alloc.c:3380 [inline]
 free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476
 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2553
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:447
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slub.c:3248 [inline]
 __kmalloc_node+0x2a9/0x380 mm/slub.c:4473
 kmalloc_node include/linux/slab.h:623 [inline]
 kvmalloc_node+0x3f/0x1b0 mm/util.c:613
 kvmalloc include/linux/slab.h:750 [inline]
 kvzalloc include/linux/slab.h:758 [inline]
 do_getxattr+0xac/0x3f0 fs/xattr.c:695
 getxattr+0x10d/0x180 fs/xattr.c:735
 path_getxattr+0xde/0x180 fs/xattr.c:751
 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+0x63/0xcd

Memory state around the buggy address:
 ffff88807eec7380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807eec7400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807eec7480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88807eec7500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807eec7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================