================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5936 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x11d6/0x3f50 net/bluetooth/hci_event.c:6210 Read of size 1 at addr ffff888024636e0a by task kworker/u5:2/4172 CPU: 1 PID: 4172 Comm: kworker/u5:2 Not tainted 5.15.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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:5936 [inline] hci_le_meta_evt+0x11d6/0x3f50 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 4283: 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: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 The buggy address belongs to the object at ffff888024636c00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 10 bytes to the right of 512-byte region [ffff888024636c00, ffff888024636e00) The buggy address belongs to the page: page:ffffea0000918d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24634 head:ffffea0000918d00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000a54000 0000000200000002 ffff888017441c80 raw: 0000000000000000 0000000080100010 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 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 10002355211, 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] usb_cache_string+0x5f/0xf0 drivers/usb/core/message.c:1027 usb_enumerate_device drivers/usb/core/hub.c:2436 [inline] usb_new_device+0x30c/0x18f0 drivers/usb/core/hub.c:2563 register_root_hub+0x25f/0x540 drivers/usb/core/hcd.c:1021 usb_add_hcd+0xc4e/0x1250 drivers/usb/core/hcd.c:3001 dummy_hcd_probe+0x154/0x2a0 drivers/usb/gadget/udc/dummy_hcd.c:2675 platform_probe+0x131/0x1b0 drivers/base/platform.c:1391 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755 driver_probe_device+0x50/0x420 drivers/base/dd.c:785 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907 page_owner free stack trace missing Memory state around the buggy address: ffff888024636d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888024636d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888024636e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888024636e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888024636f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================