================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5937 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x11f1/0x3f50 net/bluetooth/hci_event.c:6210 Read of size 1 at addr ffff888062074604 by task kworker/u5:0/146 CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: hci3 hci_rx_work 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 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5937 [inline] hci_le_meta_evt+0x11f1/0x3f50 net/bluetooth/hci_event.c:6210 hci_event_packet+0xc41/0x1550 net/bluetooth/hci_event.c:6527 hci_rx_work+0x237/0xa10 net/bluetooth/hci_core.c:5160 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 Allocated by task 5068: 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] __kmalloc_node_track_caller+0x195/0x390 mm/slub.c:4963 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x12c/0x590 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:391 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline] vhci_write+0xbc/0x430 drivers/bluetooth/hci_vhci.c:290 call_write_iter include/linux/fs.h:2172 [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 The buggy address belongs to the object at ffff888062074400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 4 bytes to the right of 512-byte region [ffff888062074400, ffff888062074600) The buggy address belongs to the page: page:ffffea0001881d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x62074 head:ffffea0001881d00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888017441c80 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4166, ts 59218960070, free_ts 59216884494 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:5466 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] __kmalloc_node_track_caller+0x1f6/0x390 mm/slub.c:4958 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x12c/0x590 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] alloc_uevent_skb+0x74/0x220 lib/kobject_uevent.c:290 uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline] kobject_uevent_net_broadcast+0x17d/0x560 lib/kobject_uevent.c:412 kobject_uevent_env+0x567/0x8d0 lib/kobject_uevent.c:608 netdev_queue_add_kobject net/core/net-sysfs.c:1677 [inline] netdev_queue_update_kobjects+0x1c1/0x3f0 net/core/net-sysfs.c:1711 register_queue_kobjects net/core/net-sysfs.c:1772 [inline] netdev_register_kobject+0x263/0x310 net/core/net-sysfs.c:2018 register_netdevice+0xfe7/0x16a0 net/core/dev.c:10396 veth_newlink+0x72e/0xe20 drivers/net/veth.c:1683 __rtnl_newlink net/core/rtnetlink.c:3521 [inline] rtnl_newlink+0x14ca/0x2050 net/core/rtnetlink.c:3569 rtnetlink_rcv_msg+0x99d/0xef0 net/core/rtnetlink.c:5647 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2489 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+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 stack_depot_save+0x3ef/0x440 lib/stackdepot.c:335 kasan_save_stack mm/kasan/common.c:40 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0xa5/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] fill_pool lib/debugobjects.c:172 [inline] __debug_object_init+0xac7/0xd30 lib/debugobjects.c:615 debug_hrtimer_init kernel/time/hrtimer.c:414 [inline] debug_init+0x24/0x200 kernel/time/hrtimer.c:468 hrtimer_init+0x1e/0x30 kernel/time/hrtimer.c:1595 pm_runtime_init+0x245/0x360 drivers/base/power/runtime.c:1694 device_pm_init drivers/base/power/power.h:169 [inline] device_initialize+0x264/0x4d0 drivers/base/core.c:2893 netdev_register_kobject+0x2f/0x310 net/core/net-sysfs.c:1990 register_netdevice+0xfe7/0x16a0 net/core/dev.c:10396 veth_newlink+0x72e/0xe20 drivers/net/veth.c:1683 __rtnl_newlink net/core/rtnetlink.c:3521 [inline] rtnl_newlink+0x14ca/0x2050 net/core/rtnetlink.c:3569 rtnetlink_rcv_msg+0x99d/0xef0 net/core/rtnetlink.c:5647 Memory state around the buggy address: ffff888062074500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888062074580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888062074600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888062074680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888062074700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================