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BUG: KASAN: slab-use-after-free in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231
Read of size 8 at addr ffff88802fecb360 by task syz-executor.1/24109

CPU: 1 PID: 24109 Comm: syz-executor.1 Not tainted 6.3.0-rc4-next-20230330-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
 print_report mm/kasan/report.c:462 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:572
 lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231
 htab_map_alloc+0xf4/0x1640 kernel/bpf/hashtab.c:487
 find_and_alloc_map kernel/bpf/syscall.c:134 [inline]
 map_create+0x508/0x1920 kernel/bpf/syscall.c:1159
 __sys_bpf+0x127f/0x53d0 kernel/bpf/syscall.c:5044
 __do_sys_bpf kernel/bpf/syscall.c:5166 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5164 [inline]
 __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5164
 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: 0033:0x7f3aef08c0f9
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:00007f3aefec2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f3aef1abf80 RCX: 00007f3aef08c0f9
RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0100000000000000
RBP: 00007f3aef0e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd25157a4f R14: 00007f3aefec2300 R15: 0000000000022000
 </TASK>

Allocated by task 21959:
 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:374 [inline]
 ____kasan_kmalloc mm/kasan/common.c:333 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:559 [inline]
 snd_pcm_hw_param_near.constprop.0+0xe0/0x8e0 sound/core/oss/pcm_oss.c:400
 snd_pcm_oss_change_params_locked+0xaba/0x3a60 sound/core/oss/pcm_oss.c:907
 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1116 [inline]
 snd_pcm_oss_get_active_substream+0x164/0x1c0 sound/core/oss/pcm_oss.c:1133
 snd_pcm_oss_get_formats+0x75/0x340 sound/core/oss/pcm_oss.c:1855
 snd_pcm_oss_set_format sound/core/oss/pcm_oss.c:1897 [inline]
 snd_pcm_oss_ioctl+0x15f3/0x3500 sound/core/oss/pcm_oss.c:2663
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
 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

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:491
 __call_rcu_common.constprop.0+0x99/0x790 kernel/rcu/tree.c:2637
 sctp_transport_destroy net/sctp/transport.c:171 [inline]
 sctp_transport_put+0x121/0x180 net/sctp/transport.c:481
 sctp_association_free+0x4d0/0x7d0 net/sctp/associola.c:379
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1328 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
 sctp_do_sm+0x3324/0x5310 net/sctp/sm_sideeffect.c:1170
 sctp_assoc_bh_rcv+0x38a/0x6c0 net/sctp/associola.c:1051
 sctp_inq_push+0x1d6/0x270 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x19a/0x5b0 net/sctp/input.c:331
 sk_backlog_rcv include/net/sock.h:1113 [inline]
 __release_sock+0x133/0x3b0 net/core/sock.c:2922
 release_sock+0x58/0x1b0 net/core/sock.c:3489
 sctp_wait_for_connect+0x416/0x5c0 net/sctp/socket.c:9320
 __sctp_connect+0x9a1/0xc30 net/sctp/socket.c:1246
 sctp_connect net/sctp/socket.c:4806 [inline]
 sctp_inet_connect+0x161/0x200 net/sctp/socket.c:4821
 __sys_connect_file+0x153/0x1a0 net/socket.c:2001
 __sys_connect+0x165/0x1a0 net/socket.c:2018
 __do_sys_connect net/socket.c:2028 [inline]
 __se_sys_connect net/socket.c:2025 [inline]
 __x64_sys_connect+0x73/0xb0 net/socket.c:2025
 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

Second to 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:491
 __call_rcu_common.constprop.0+0x99/0x790 kernel/rcu/tree.c:2637
 pwq_unbound_release_workfn+0x26b/0x340 kernel/workqueue.c:3864
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x33e/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

The buggy address belongs to the object at ffff88802fecb000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 864 bytes inside of
 freed 1024-byte region [ffff88802fecb000, ffff88802fecb400)

The buggy address belongs to the physical page:
page:ffffea0000bfb200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802fecd800 pfn:0x2fec8
head:ffffea0000bfb200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012441dc0 ffffea0000b47610 ffffea0001f84c10
raw: ffff88802fecd800 0000000000100007 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5173, tgid 5173 (kworker/0:5), ts 169881777278, free_ts 0
 prep_new_page mm/page_alloc.c:1729 [inline]
 get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
 alloc_slab_page mm/slub.c:1851 [inline]
 allocate_slab+0x28e/0x380 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+0x136/0x320 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:965 [inline]
 __kmalloc_node_track_caller+0x4f/0x1a0 mm/slab_common.c:986
 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:535
 __alloc_skb+0x129/0x330 net/core/skbuff.c:604
 alloc_skb include/linux/skbuff.h:1269 [inline]
 nlmsg_new include/net/netlink.h:1003 [inline]
 inet6_rt_notify+0xf0/0x2b0 net/ipv6/route.c:6166
 fib6_add_rt2node net/ipv6/ip6_fib.c:1251 [inline]
 fib6_add+0x200d/0x4080 net/ipv6/ip6_fib.c:1477
 __ip6_ins_rt net/ipv6/route.c:1302 [inline]
 ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1312
 __ipv6_ifa_notify+0x8fe/0xb90 net/ipv6/addrconf.c:6163
 ipv6_ifa_notify net/ipv6/addrconf.c:6202 [inline]
 addrconf_dad_completed+0x133/0xe00 net/ipv6/addrconf.c:4214
 addrconf_dad_begin net/ipv6/addrconf.c:4019 [inline]
 addrconf_dad_work+0x820/0x1390 net/ipv6/addrconf.c:4121
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802fecb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802fecb280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802fecb300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff88802fecb380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802fecb400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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