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BUG: KASAN: slab-use-after-free in __lock_acquire+0x7c/0xc70 kernel/locking/lockdep.c:5065
Read of size 8 at addr ffff88811321b020 by task syz.1.1186/7527

CPU: 0 UID: 0 PID: 7527 Comm: syz.1.1186 Not tainted 6.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x108/0x280 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 __lock_acquire+0x7c/0xc70 kernel/locking/lockdep.c:5065
 lock_acquire+0x1a9/0x3a0 kernel/locking/lockdep.c:5825
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 sco_chan_add net/bluetooth/sco.c:292 [inline]
 sco_connect net/bluetooth/sco.c:345 [inline]
 sco_sock_connect+0x260/0x820 net/bluetooth/sco.c:645
 __sys_connect_file net/socket.c:2073 [inline]
 __sys_connect+0x30d/0x380 net/socket.c:2090
 __do_sys_connect net/socket.c:2100 [inline]
 __se_sys_connect net/socket.c:2097 [inline]
 __x64_sys_connect+0x75/0x90 net/socket.c:2097
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f680277e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f68034f9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f6802935fa0 RCX: 00007f680277e819
RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00007f68027f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6802935fa0 R15: 00007fff8059d288
 </TASK>

Allocated by task 7513:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:257 [inline]
 __kmalloc_cache_noprof+0x19e/0x360 mm/slub.c:4295
 kmalloc_noprof include/linux/slab.h:878 [inline]
 kzalloc_noprof include/linux/slab.h:1014 [inline]
 sco_conn_add+0xce/0x320 net/bluetooth/sco.c:199
 sco_connect net/bluetooth/sco.c:336 [inline]
 sco_sock_connect+0x242/0x820 net/bluetooth/sco.c:645
 __sys_connect_file net/socket.c:2073 [inline]
 __sys_connect+0x30d/0x380 net/socket.c:2090
 __do_sys_connect net/socket.c:2100 [inline]
 __se_sys_connect net/socket.c:2097 [inline]
 __x64_sys_connect+0x75/0x90 net/socket.c:2097
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 7527:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:2342 [inline]
 slab_free mm/slub.c:4579 [inline]
 kfree+0x186/0x3e0 mm/slub.c:4727
 sco_conn_add+0x96/0x320 net/bluetooth/sco.c:195
 sco_connect net/bluetooth/sco.c:336 [inline]
 sco_sock_connect+0x242/0x820 net/bluetooth/sco.c:645
 __sys_connect_file net/socket.c:2073 [inline]
 __sys_connect+0x30d/0x380 net/socket.c:2090
 __do_sys_connect net/socket.c:2100 [inline]
 __se_sys_connect net/socket.c:2097 [inline]
 __x64_sys_connect+0x75/0x90 net/socket.c:2097
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88811321b000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 32 bytes inside of
 freed 256-byte region [ffff88811321b000, ffff88811321b100)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11321a
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x100000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0100000000000040 ffff888100041b40 ffffea0005d3c080 dead000000000003
raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000
head: 0100000000000040 ffff888100041b40 ffffea0005d3c080 dead000000000003
head: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000
head: 0100000000000001 ffffea00044c8681 ffffffffffffffff 0000000000000000
head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 6551002086, free_ts 4747367799
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x10f/0x130 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x42ac/0x4480 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x256/0x650 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x289/0x4e0 mm/mempolicy.c:2265
 alloc_slab_page+0x6a/0x140 mm/slub.c:2412
 allocate_slab+0x5d/0x290 mm/slub.c:2578
 new_slab mm/slub.c:2631 [inline]
 ___slab_alloc+0xa7f/0x11e0 mm/slub.c:3818
 __slab_alloc mm/slub.c:3908 [inline]
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 __do_kmalloc_node mm/slub.c:4263 [inline]
 __kmalloc_noprof+0x25a/0x440 mm/slub.c:4276
 kmalloc_noprof include/linux/slab.h:882 [inline]
 mpi_alloc_limb_space lib/crypto/mpi/mpiutil.c:64 [inline]
 mpi_alloc+0x6b/0x110 lib/crypto/mpi/mpiutil.c:39
 mpi_read_raw_data+0xd8/0xa20 lib/crypto/mpi/mpicoder.c:57
 rsa_set_pub_key+0x37f/0x5e0 crypto/rsa.c:287
 crypto_akcipher_set_pub_key include/crypto/akcipher.h:407 [inline]
 pkcs1pad_set_pub_key+0xc1/0x1c0 crypto/rsa-pkcs1pad.c:138
 public_key_verify_signature+0x41f/0x6f0 crypto/asymmetric_keys/public_key.c:443
 x509_check_for_self_signed+0x2a5/0x370 crypto/asymmetric_keys/x509_public_key.c:125
 x509_cert_parse+0x5d2/0x6f0 crypto/asymmetric_keys/x509_cert_parser.c:129
 x509_key_preparse+0x60/0x630 crypto/asymmetric_keys/x509_public_key.c:157
page last free pid 43 tgid 43 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0xaa5/0xc80 mm/page_alloc.c:2638
 vfree+0x10e/0x210 mm/vmalloc.c:3361
 delayed_vfree_work+0x3c/0x70 mm/vmalloc.c:3282
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0x8e8/0x1360 kernel/workqueue.c:3310
 worker_thread+0x868/0xc70 kernel/workqueue.c:3391
 kthread+0x268/0x2c0 kernel/kthread.c:389
 ret_from_fork+0x32/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff88811321af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811321af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811321b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff88811321b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811321b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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