Bluetooth: hci0: Unknown advertising packet type: 0x6678 ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5895 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x11d3/0x3b90 net/bluetooth/hci_event.c:6165 Read of size 1 at addr ffff88801dd7940a by task kworker/u5:2/3589 CPU: 0 PID: 3589 Comm: kworker/u5:2 Not tainted 5.15.101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: hci0 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb 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:5895 [inline] hci_le_meta_evt+0x11d3/0x3b90 net/bluetooth/hci_event.c:6165 hci_event_packet+0xc28/0x1480 net/bluetooth/hci_event.c:6482 hci_rx_work+0x240/0x7d0 net/bluetooth/hci_core.c:5153 process_one_work+0x90d/0x1270 kernel/workqueue.c:2306 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 :298 Allocated by task 3585: 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+0x188/0x310 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:1166 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:391 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:167 [inline] vhci_write+0xbc/0x430 drivers/bluetooth/hci_vhci.c:287 call_write_iter include/linux/fs.h:2101 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/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+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88801dd79000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 10 bytes to the right of 1024-byte region [ffff88801dd79000, ffff88801dd79400) The buggy address belongs to the page: page:ffffea0000775e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1dd78 head:ffffea0000775e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011c41dc0 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3585, ts 52588876180, free_ts 46884641521 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x32dd/0x3470 mm/page_alloc.c:4159 __alloc_pages+0x272/0x790 mm/page_alloc.c:5421 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+0x185/0x220 mm/slub.c:3245 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] afs_alloc_call+0x78/0x310 fs/afs/rxrpc.c:141 afs_charge_preallocation+0xe0/0x2b0 fs/afs/rxrpc.c:719 afs_open_socket+0x455/0x600 fs/afs/rxrpc.c:92 afs_net_init+0x7b5/0x990 fs/afs/main.c:126 ops_init+0x356/0x600 net/core/net_namespace.c:135 setup_net+0x358/0x9e0 net/core/net_namespace.c:329 copy_net_ns+0x395/0x5d0 net/core/net_namespace.c:473 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x11e/0x170 kernel/nsproxy.c:226 ksys_unshare+0x580/0xb20 kernel/fork.c:3094 __do_sys_unshare kernel/fork.c:3168 [inline] __se_sys_unshare kernel/fork.c:3166 [inline] __x64_sys_unshare+0x34/0x40 kernel/fork.c:3166 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+0xcb7/0xd70 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 free_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2507 put_cpu_partial+0x132/0x1a0 mm/slub.c:2587 do_slab_free mm/slub.c:3487 [inline] ___cache_free+0xe3/0x100 mm/slub.c:3506 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x162/0x180 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+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x2e0 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] alloc_buffer_head+0x20/0xf0 fs/buffer.c:3311 alloc_page_buffers+0x3a3/0x660 fs/buffer.c:832 create_empty_buffers+0x3a/0x6d0 fs/buffer.c:1562 ext4_block_write_begin+0x341/0x13a0 fs/ext4/inode.c:1069 ext4_da_write_begin+0x64a/0xc50 fs/ext4/inode.c:2998 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776 Memory state around the buggy address: ffff88801dd79300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801dd79380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801dd79400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801dd79480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801dd79500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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