================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0x2b/0x120 lib/list_debug.c:46 Read of size 8 at addr ffff8881482cab88 by task syz.1.293/5802 CPU: 1 PID: 5802 Comm: syz.1.293 Not tainted 5.15.176-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 __list_del_entry_valid+0x2b/0x120 lib/list_debug.c:46 __list_del_entry include/linux/list.h:132 [inline] list_del include/linux/list.h:146 [inline] mgmt_pending_remove+0x22/0x1a0 net/bluetooth/mgmt_util.c:268 mgmt_pending_foreach+0xc9/0x120 net/bluetooth/mgmt_util.c:226 __mgmt_power_off+0x183/0x410 net/bluetooth/mgmt.c:8638 hci_dev_do_close+0x625/0x1070 net/bluetooth/hci_core.c:1791 hci_dev_close+0xe5/0x190 net/bluetooth/hci_core.c:1877 sock_do_ioctl+0x11d/0x5a0 net/socket.c:1140 sock_ioctl+0x47f/0x770 net/socket.c:1257 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f052fb58d29 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:00007f052d9c9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f052fd48fa0 RCX: 00007f052fb58d29 RDX: 0000000000000000 RSI: 00000000400448ca RDI: 0000000000000009 RBP: 00007f052fbd4b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f052fd48fa0 R15: 00007fff75b967f8 Allocated by task 5510: 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+0xba/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] kmem_cache_alloc_trace+0x143/0x290 mm/slub.c:3247 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] mgmt_pending_add+0x61/0x310 net/bluetooth/mgmt_util.c:236 get_clock_info+0x3c1/0x770 net/bluetooth/mgmt.c:6641 hci_mgmt_cmd+0x9c9/0xde0 net/bluetooth/hci_sock.c:1652 hci_sock_sendmsg+0x3f6/0xe50 net/bluetooth/hci_sock.c:1787 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] sock_write_iter+0x39b/0x530 net/socket.c:1079 call_write_iter include/linux/fs.h:2174 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacd/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 5815: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0xf1/0x270 mm/slub.c:4559 mgmt_pending_foreach+0xc9/0x120 net/bluetooth/mgmt_util.c:226 mgmt_index_removed+0x158/0x3c0 net/bluetooth/mgmt.c:8546 hci_sock_bind+0xc95/0x10c0 net/bluetooth/hci_sock.c:1246 __sys_bind+0x388/0x400 net/socket.c:1720 __do_sys_bind net/socket.c:1731 [inline] __se_sys_bind net/socket.c:1729 [inline] __x64_sys_bind+0x76/0x80 net/socket.c:1729 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3596 sctp_inetaddr_event+0x556/0x5f0 net/sctp/protocol.c:815 notifier_call_chain kernel/notifier.c:83 [inline] blocking_notifier_call_chain+0x104/0x1b0 kernel/notifier.c:318 __inet_del_ifa+0x87b/0x1020 net/ipv4/devinet.c:443 inet_del_ifa net/ipv4/devinet.c:480 [inline] inetdev_destroy net/ipv4/devinet.c:320 [inline] inetdev_event+0x62b/0x1490 net/ipv4/devinet.c:1611 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2018 [inline] call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] unregister_netdevice_many+0xf1b/0x18f0 net/core/dev.c:11102 default_device_exit_batch+0x390/0x3f0 net/core/dev.c:11635 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x763/0xb60 net/core/net_namespace.c:599 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff8881482cab80 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 8 bytes inside of 64-byte region [ffff8881482cab80, ffff8881482cabc0) The buggy address belongs to the page: page:ffffea000520b280 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1482ca flags: 0x57ff00000000200(slab|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000000200 ffffea0000724200 0000000400000004 ffff888017441640 raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 13249972841, free_ts 0 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192 __alloc_pages+0x272/0x700 mm/page_alloc.c:5465 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2031 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc_trace+0x1a0/0x290 mm/slub.c:3245 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] kobject_create lib/kobject.c:792 [inline] kobject_create_and_add+0x57/0x230 lib/kobject.c:818 module_create_drivers_dir drivers/base/module.c:29 [inline] module_add_driver+0x227/0x2c0 drivers/base/module.c:65 bus_add_driver+0x398/0x600 drivers/base/bus.c:624 driver_register+0x2bf/0x3a0 drivers/base/driver.c:240 usb_register_driver+0x206/0x3d0 drivers/usb/core/driver.c:1061 do_one_initcall+0x22b/0x7a0 init/main.c:1302 do_initcall_level+0x157/0x210 init/main.c:1375 do_initcalls+0x49/0x90 init/main.c:1391 kernel_init_freeable+0x425/0x5c0 init/main.c:1615 kernel_init+0x19/0x290 init/main.c:1506 page_owner free stack trace missing Memory state around the buggy address: ffff8881482caa80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881482cab00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8881482cab80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8881482cac00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881482cac80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================