================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5964 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x1324/0x3c90 net/bluetooth/hci_event.c:6238 Read of size 1 at addr ffff888022b6fc00 by task kworker/u5:7/4201 CPU: 0 PID: 4201 Comm: kworker/u5:7 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: hci2 hci_rx_work Call Trace: dump_stack_lvl+0x188/0x250 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:5964 [inline] hci_le_meta_evt+0x1324/0x3c90 net/bluetooth/hci_event.c:6238 hci_event_packet+0xe48/0x1370 net/bluetooth/hci_event.c:6555 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5164 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 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 4726: 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:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x745/0xd60 fs/read_write.c:594 ksys_write+0x152/0x260 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 ffff888022b6f800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 0 bytes to the right of 1024-byte region [ffff888022b6f800, ffff888022b6fc00) The buggy address belongs to the page: page:ffffea00008ada00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22b68 head:ffffea00008ada00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00008a8800 0000000200000002 ffff888016c41dc0 raw: 0000000000000000 0000000000100010 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 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 542, ts 6724341883, free_ts 0 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 __alloc_pages_node include/linux/gfp.h:570 [inline] alloc_slab_page mm/slub.c:1782 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xb6/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] __kmalloc_node+0x200/0x3b0 mm/slub.c:4456 kmalloc_node include/linux/slab.h:630 [inline] kzalloc_node include/linux/slab.h:749 [inline] blk_mq_alloc_hctx block/blk-mq.c:2806 [inline] blk_mq_alloc_and_init_hctx block/blk-mq.c:3220 [inline] blk_mq_realloc_hw_ctxs+0x46a/0x1760 block/blk-mq.c:3272 blk_mq_init_allocated_queue+0x408/0x1790 block/blk-mq.c:3333 blk_mq_init_queue_data block/blk-mq.c:3168 [inline] blk_mq_init_queue+0x68/0xd0 block/blk-mq.c:3178 scsi_alloc_sdev+0x6f2/0xab0 drivers/scsi/scsi_scan.c:319 scsi_probe_and_add_lun+0x1a7/0x3e90 drivers/scsi/scsi_scan.c:1157 __scsi_scan_target+0x1d4/0x1050 drivers/scsi/scsi_scan.c:1638 scsi_scan_channel drivers/scsi/scsi_scan.c:1726 [inline] scsi_scan_host_selected+0x36e/0x690 drivers/scsi/scsi_scan.c:1755 do_scsi_scan_host drivers/scsi/scsi_scan.c:1894 [inline] do_scan_async+0x11a/0x700 drivers/scsi/scsi_scan.c:1904 async_run_entry_fn+0x9f/0x3e0 kernel/async.c:127 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 page_owner free stack trace missing Memory state around the buggy address: ffff888022b6fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888022b6fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888022b6fc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888022b6fc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888022b6fd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================