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BUG: KASAN: use-after-free in rxrpc_local_cmp_key net/rxrpc/local_object.c:53 [inline]
BUG: KASAN: use-after-free in rxrpc_lookup_local+0xdcf/0xfb0 net/rxrpc/local_object.c:224
Read of size 2 at addr ffff88802078521c by task syz-executor.0/5748

CPU: 0 PID: 5748 Comm: syz-executor.0 Not tainted 6.1.0-syzkaller-09654-gcfca00767feb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x15e/0x45d mm/kasan/report.c:395
 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495
 rxrpc_local_cmp_key net/rxrpc/local_object.c:53 [inline]
 rxrpc_lookup_local+0xdcf/0xfb0 net/rxrpc/local_object.c:224
 rxrpc_sendmsg+0x4bc/0x650 net/rxrpc/af_rxrpc.c:543
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2476
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2530
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2559
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2bb028c0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2bb0fda168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2bb03abf80 RCX: 00007f2bb028c0a9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00007f2bb02e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe4499047f R14: 00007f2bb0fda300 R15: 0000000000022000
 </TASK>

Allocated by task 5741:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 ____kasan_kmalloc mm/kasan/common.c:330 [inline]
 __kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:380
 kmalloc include/linux/slab.h:580 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 rxrpc_alloc_local net/rxrpc/local_object.c:93 [inline]
 rxrpc_lookup_local+0x4d9/0xfb0 net/rxrpc/local_object.c:249
 rxrpc_sendmsg+0x4bc/0x650 net/rxrpc/af_rxrpc.c:543
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2476
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2530
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2559
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 15:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:518
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 __kmem_cache_free+0xaf/0x3b0 mm/slub.c:3800
 rcu_do_batch kernel/rcu/tree.c:2244 [inline]
 rcu_core+0x81f/0x1980 kernel/rcu/tree.c:2504
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488
 __call_rcu_common.constprop.0+0x99/0x820 kernel/rcu/tree.c:2753
 rxrpc_put_local.part.0+0x128/0x170 net/rxrpc/local_object.c:332
 rxrpc_put_local+0x25/0x30 net/rxrpc/local_object.c:324
 rxrpc_release_sock net/rxrpc/af_rxrpc.c:888 [inline]
 rxrpc_release+0x237/0x550 net/rxrpc/af_rxrpc.c:914
 __sock_release+0xcd/0x280 net/socket.c:650
 sock_close+0x1c/0x20 net/socket.c:1365
 __fput+0x27c/0xa90 fs/file_table.c:320
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888020785000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 540 bytes inside of
 1024-byte region [ffff888020785000, ffff888020785400)

The buggy address belongs to the physical page:
page:ffffea000081e000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20780
head:ffffea000081e000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff888012441dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 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 5300, tgid 5300 (syz-fuzzer), ts 115652946921, free_ts 115639760028
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4291
 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5558
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285
 alloc_slab_page mm/slub.c:1851 [inline]
 allocate_slab+0x25f/0x350 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0xa91/0x1400 mm/slub.c:3193
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 __kmem_cache_alloc_node+0x1a4/0x430 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:988
 kmalloc_reserve net/core/skbuff.c:492 [inline]
 __alloc_skb+0xe9/0x310 net/core/skbuff.c:565
 alloc_skb include/linux/skbuff.h:1270 [inline]
 __tcp_send_ack.part.0+0x67/0x760 net/ipv4/tcp_output.c:3957
 __tcp_send_ack net/ipv4/tcp_output.c:3989 [inline]
 tcp_send_ack+0x81/0xa0 net/ipv4/tcp_output.c:3989
 __tcp_cleanup_rbuf+0x356/0x470 net/ipv4/tcp.c:1617
 tcp_recvmsg_locked+0x72c/0x22b0 net/ipv4/tcp.c:2649
 tcp_recvmsg+0x117/0x620 net/ipv4/tcp.c:2679
 inet_recvmsg+0x114/0x5e0 net/ipv4/af_inet.c:861
 sock_recvmsg_nosec net/socket.c:995 [inline]
 sock_recvmsg net/socket.c:1013 [inline]
 sock_recvmsg net/socket.c:1009 [inline]
 sock_read_iter+0x348/0x480 net/socket.c:1086
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1509
 free_unref_page_prepare mm/page_alloc.c:3387 [inline]
 free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3483
 __folio_put_large mm/swap.c:118 [inline]
 __folio_put+0x109/0x140 mm/swap.c:126
 folio_put include/linux/mm.h:1159 [inline]
 put_page include/linux/mm.h:1211 [inline]
 __skb_frag_unref include/linux/skbuff.h:3388 [inline]
 skb_release_data+0x522/0x870 net/core/skbuff.c:845
 skb_release_all net/core/skbuff.c:916 [inline]
 napi_consume_skb net/core/skbuff.c:1176 [inline]
 napi_consume_skb+0x14e/0x290 net/core/skbuff.c:1154
 skb_defer_free_flush net/core/dev.c:6633 [inline]
 net_rx_action+0x346/0xde0 net/core/dev.c:6654
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571

Memory state around the buggy address:
 ffff888020785100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888020785180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888020785200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff888020785280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888020785300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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