==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline]
BUG: KASAN: use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
BUG: KASAN: use-after-free in hci_conn_timeout+0x30/0x450 net/bluetooth/hci_conn.c:439
Read of size 4 at addr ffff8880790aa010 by task kworker/u5:0/146

CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: hci0 hci_conn_timeout
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x235/0x290 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 hci_conn_timeout+0x30/0x450 net/bluetooth/hci_conn.c:439
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Allocated by task 4198:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xaf/0xe0 mm/kasan/common.c:522
 kmalloc include/linux/slab.h:607 [inline]
 kzalloc include/linux/slab.h:738 [inline]
 hci_conn_add+0x66/0x10d0 net/bluetooth/hci_conn.c:558
 hci_conn_request_evt+0x53b/0xae0 net/bluetooth/hci_event.c:2873
 hci_event_packet+0x735/0x1310 net/bluetooth/hci_event.c:6431
 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5190
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Freed by task 4625:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1710 [inline]
 slab_free_freelist_hook+0xec/0x170 mm/slub.c:1736
 slab_free mm/slub.c:3504 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4564
 device_release+0x92/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x217/0x450 lib/kobject.c:761
 hci_conn_put include/net/bluetooth/hci_core.h:1152 [inline]
 conn_info_cmd_complete+0x1d3/0x290 net/bluetooth/mgmt.c:6349
 cmd_complete_rsp+0x64/0x170 net/bluetooth/mgmt.c:1307
 mgmt_pending_foreach+0xc1/0x110 net/bluetooth/mgmt_util.c:226
 __mgmt_power_off+0x187/0x370 net/bluetooth/mgmt.c:8646
 hci_dev_do_close+0xdc6/0x1020 net/bluetooth/hci_core.c:1809
 hci_dev_close+0xd9/0x180 net/bluetooth/hci_core.c:1895
 sock_do_ioctl+0xfb/0x320 net/socket.c:1148
 sock_ioctl+0x48a/0x700 net/socket.c:1267
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Last potentially related work creation:
 kasan_save_stack+0x35/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
 insert_work+0x54/0x3d0 kernel/workqueue.c:1366
 __queue_work+0x90b/0xc80 kernel/workqueue.c:1532
 queue_delayed_work_on+0x12d/0x1f0 kernel/workqueue.c:1715
 conn_info_cmd_complete+0x1c4/0x290 net/bluetooth/mgmt.c:6348
 cmd_complete_rsp+0x64/0x170 net/bluetooth/mgmt.c:1307
 mgmt_pending_foreach+0xc1/0x110 net/bluetooth/mgmt_util.c:226
 __mgmt_power_off+0x187/0x370 net/bluetooth/mgmt.c:8646
 hci_dev_do_close+0xdc6/0x1020 net/bluetooth/hci_core.c:1809
 hci_dev_close+0xd9/0x180 net/bluetooth/hci_core.c:1895
 sock_do_ioctl+0xfb/0x320 net/socket.c:1148
 sock_ioctl+0x48a/0x700 net/socket.c:1267
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff8880790aa000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 16 bytes inside of
 4096-byte region [ffff8880790aa000, ffff8880790ab000)
The buggy address belongs to the page:
page:ffffea0001e42a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x790a8
head:ffffea0001e42a00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888016c42140
raw: 0000000000000000 0000000000040004 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4197, ts 68892891623, free_ts 68860906587
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x24f6/0x2670 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 alloc_slab_page mm/slub.c:1780 [inline]
 allocate_slab mm/slub.c:1917 [inline]
 new_slab+0xc0/0x4b0 mm/slub.c:1980
 ___slab_alloc+0x807/0xdd0 mm/slub.c:3013
 __slab_alloc mm/slub.c:3100 [inline]
 slab_alloc_node mm/slub.c:3191 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc_trace+0xf9/0x290 mm/slub.c:3250
 kmalloc include/linux/slab.h:607 [inline]
 tomoyo_print_header security/tomoyo/audit.c:156 [inline]
 tomoyo_init_log+0x183/0x1e90 security/tomoyo/audit.c:255
 tomoyo_supervisor+0x38d/0x1190 security/tomoyo/common.c:2097
 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
 tomoyo_path_number_perm+0x4fb/0x6b0 security/tomoyo/file.c:734
 security_file_ioctl+0x6c/0xa0 security/security.c:1617
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x48/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
 free_slab mm/slub.c:2020 [inline]
 discard_slab mm/slub.c:2026 [inline]
 __unfreeze_partials+0x188/0x1e0 mm/slub.c:2512
 put_cpu_partial+0x12d/0x190 mm/slub.c:2592
 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3225 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x15d/0x280 mm/slub.c:3238
 ptlock_alloc mm/memory.c:5556 [inline]
 ptlock_init include/linux/mm.h:2241 [inline]
 pmd_ptlock_init include/linux/mm.h:2327 [inline]
 pgtable_pmd_page_ctor include/linux/mm.h:2363 [inline]
 pmd_alloc_one include/asm-generic/pgalloc.h:129 [inline]
 __pmd_alloc+0x116/0x750 mm/memory.c:4958
 pmd_alloc include/linux/mm.h:2191 [inline]
 copy_pmd_range mm/memory.c:1147 [inline]
 copy_pud_range mm/memory.c:1204 [inline]
 copy_p4d_range mm/memory.c:1228 [inline]
 copy_page_range+0x2c83/0x32c0 mm/memory.c:1301
 dup_mmap kernel/fork.c:616 [inline]
 dup_mm kernel/fork.c:1472 [inline]
 copy_mm+0xc61/0x13d0 kernel/fork.c:1524
 copy_process+0x17a7/0x3e70 kernel/fork.c:2292
 kernel_clone+0x23f/0x990 kernel/fork.c:2682
 __do_sys_clone kernel/fork.c:2799 [inline]
 __se_sys_clone kernel/fork.c:2783 [inline]
 __x64_sys_clone+0x19a/0x210 kernel/fork.c:2783
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80

Memory state around the buggy address:
 ffff8880790a9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880790a9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880790aa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8880790aa080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880790aa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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