================================================================== BUG: KASAN: slab-out-of-bounds in sco_conn_free net/bluetooth/sco.c:87 [inline] BUG: KASAN: slab-out-of-bounds in kref_put include/linux/kref.h:65 [inline] BUG: KASAN: slab-out-of-bounds in sco_conn_put+0xad/0x210 net/bluetooth/sco.c:107 Write of size 8 at addr ffff888057a035a0 by task syz-executor/5842 CPU: 0 UID: 0 PID: 5842 Comm: syz-executor Not tainted 6.13.0-syzkaller-04101-gb2aec4efe834 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 sco_conn_free net/bluetooth/sco.c:87 [inline] kref_put include/linux/kref.h:65 [inline] sco_conn_put+0xad/0x210 net/bluetooth/sco.c:107 hci_disconn_cfm include/net/bluetooth/hci_core.h:2069 [inline] hci_conn_hash_flush+0x1be/0x350 net/bluetooth/hci_conn.c:2698 hci_dev_close_sync+0xa42/0x11c0 net/bluetooth/hci_sync.c:5197 hci_dev_do_close net/bluetooth/hci_core.c:482 [inline] hci_unregister_dev+0x20b/0x510 net/bluetooth/hci_core.c:2677 vhci_release+0x80/0xd0 drivers/bluetooth/hci_vhci.c:664 __fput+0x23c/0xa50 fs/file_table.c:450 task_work_run+0x24f/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2a/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f896bf8cda9 Code: Unable to access opcode bytes at 0x7f896bf8cd7f. RSP: 002b:00007fff26f244a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f896c00fa8f RCX: 00007f896bf8cda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043 RBP: 00007f896c00faa1 R08: 00007fff26f22247 R09: 00000000000927c0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 00000000000927c0 R14: 0000000000028323 R15: 00007fff26f24650 Allocated by task 9149: 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:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_node_track_caller_noprof+0x28b/0x4c0 mm/slub.c:4317 __do_krealloc mm/slub.c:4824 [inline] krealloc_noprof+0x10f/0x2f0 mm/slub.c:4877 copy_array kernel/bpf/verifier.c:1227 [inline] copy_stack_state kernel/bpf/verifier.c:1282 [inline] copy_func_state kernel/bpf/verifier.c:1464 [inline] copy_verifier_state+0x865/0xec0 kernel/bpf/verifier.c:1503 push_stack+0x19b/0x3d0 kernel/bpf/verifier.c:1766 check_cond_jmp_op+0x2171/0x4020 kernel/bpf/verifier.c:15711 do_check+0x96c0/0xfcd0 kernel/bpf/verifier.c:18849 do_check_common+0x1564/0x2010 kernel/bpf/verifier.c:21848 do_check_main kernel/bpf/verifier.c:21939 [inline] bpf_check+0x804e/0x1fc90 kernel/bpf/verifier.c:22665 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2947 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5790 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline] __se_sys_bpf kernel/bpf/syscall.c:5895 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 9149: 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:582 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:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x196/0x430 mm/slub.c:4761 free_func_state kernel/bpf/verifier.c:1435 [inline] free_verifier_state kernel/bpf/verifier.c:1445 [inline] pop_stack+0x2bc/0x470 kernel/bpf/verifier.c:1741 do_check_common+0x15c5/0x2010 kernel/bpf/verifier.c:21857 do_check_main kernel/bpf/verifier.c:21939 [inline] bpf_check+0x804e/0x1fc90 kernel/bpf/verifier.c:22665 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2947 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5790 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline] __se_sys_bpf kernel/bpf/syscall.c:5895 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888057a00000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 5536 bytes to the right of allocated 8192-byte region [ffff888057a00000, ffff888057a02000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x57a00 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801ac42280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff88801ac42280 dead000000000122 0000000000000000 head: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea00015e8001 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 9149, tgid 9148 (syz.4.836), ts 159597539422, free_ts 156659006602 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3476 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x3e1/0x780 mm/mempolicy.c:2269 alloc_slab_page+0x6a/0x110 mm/slub.c:2423 allocate_slab+0x5a/0x2b0 mm/slub.c:2589 new_slab mm/slub.c:2642 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3830 __slab_alloc+0x58/0xa0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_node_track_caller_noprof+0x2e9/0x4c0 mm/slub.c:4317 __do_krealloc mm/slub.c:4824 [inline] krealloc_noprof+0x10f/0x2f0 mm/slub.c:4877 copy_array kernel/bpf/verifier.c:1227 [inline] copy_stack_state kernel/bpf/verifier.c:1282 [inline] copy_func_state kernel/bpf/verifier.c:1464 [inline] copy_verifier_state+0x865/0xec0 kernel/bpf/verifier.c:1503 push_stack+0x19b/0x3d0 kernel/bpf/verifier.c:1766 check_cond_jmp_op+0x2171/0x4020 kernel/bpf/verifier.c:15711 do_check+0x96c0/0xfcd0 kernel/bpf/verifier.c:18849 do_check_common+0x1564/0x2010 kernel/bpf/verifier.c:21848 do_check_main kernel/bpf/verifier.c:21939 [inline] bpf_check+0x804e/0x1fc90 kernel/bpf/verifier.c:22665 page last free pid 5169 tgid 5169 stack trace: create_dummy_stack mm/page_owner.c:94 [inline] register_dummy_stack+0x8a/0xe0 mm/page_owner.c:100 init_page_owner+0x3e/0x970 mm/page_owner.c:118 invoke_init_callbacks mm/page_ext.c:148 [inline] page_ext_init+0x731/0x790 mm/page_ext.c:497 mm_core_init+0x4c/0x60 mm/mm_init.c:2669 Memory state around the buggy address: ffff888057a03480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888057a03500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888057a03580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888057a03600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888057a03680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================