Bluetooth: hci3: Unknown advertising packet type: 0xffff ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5935 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x12db/0x3b80 net/bluetooth/hci_event.c:6208 Read of size 1 at addr ffff88807e1c3402 by task kworker/u5:7/4197 CPU: 1 PID: 4197 Comm: kworker/u5:7 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: hci3 hci_rx_work Call Trace: dump_stack_lvl+0x168/0x230 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 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5935 [inline] hci_le_meta_evt+0x12db/0x3b80 net/bluetooth/hci_event.c:6208 hci_event_packet+0xe05/0x12f0 net/bluetooth/hci_event.c:6525 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5160 process_one_work+0x863/0x1000 kernel/workqueue.c:2310 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 4315: 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+0xb5/0xf0 mm/kasan/common.c:522 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x22c/0x750 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:392 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline] vhci_write+0xbc/0x450 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+0x712/0xd00 fs/read_write.c:594 ksys_write+0x14d/0x250 fs/read_write.c:647 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 ffff88807e1c3000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 2 bytes to the right of 1024-byte region [ffff88807e1c3000, ffff88807e1c3400) The buggy address belongs to the page: page:ffffea0001f87000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e1c0 head:ffffea0001f87000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888016841dc0 raw: 0000000000000000 0000000080100010 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4315, ts 60607772488, free_ts 60456454003 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1975 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] __kmalloc_node+0x200/0x3b0 mm/slub.c:4451 kmalloc_node include/linux/slab.h:627 [inline] kvmalloc_node+0x84/0x130 mm/util.c:619 kvmalloc include/linux/mm.h:805 [inline] kvzalloc include/linux/mm.h:813 [inline] bucket_table_alloc lib/rhashtable.c:184 [inline] rhashtable_init+0x57b/0xa70 lib/rhashtable.c:1061 ipc_init_ids+0x77/0x1e0 ipc/util.c:120 create_ipc_ns ipc/namespace.c:62 [inline] copy_ipcs+0x36b/0x4b0 ipc/namespace.c:84 create_new_namespaces+0x212/0x6f0 kernel/nsproxy.c:90 unshare_nsproxy_namespaces+0x116/0x160 kernel/nsproxy.c:226 ksys_unshare+0x4bc/0x890 kernel/fork.c:3175 __do_sys_unshare kernel/fork.c:3249 [inline] __se_sys_unshare kernel/fork.c:3247 [inline] __x64_sys_unshare+0x34/0x40 kernel/fork.c:3247 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+0x94/0x280 mm/page_alloc.c:3396 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 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:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 getname_kernel+0x56/0x2e0 fs/namei.c:226 kern_path+0x1f/0x190 fs/namei.c:2581 tomoyo_mount_acl security/tomoyo/mount.c:136 [inline] tomoyo_mount_permission+0x714/0x900 security/tomoyo/mount.c:237 security_sb_mount+0x83/0xb0 security/security.c:978 path_mount+0xb8/0x1020 fs/namespace.c:3286 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542 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 Memory state around the buggy address: ffff88807e1c3300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807e1c3380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807e1c3400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807e1c3480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807e1c3500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================