UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed Bluetooth: hci7: Entering manufacturer mode failed (-110) ================================================================== BUG: KASAN: use-after-free in hci_cmd_timeout+0x1ae/0x1c0 net/bluetooth/hci_core.c:2574 Read of size 2 at addr ffff88809a73e848 by task kworker/1:1/25 CPU: 1 PID: 25 Comm: kworker/1:1 Not tainted 4.19.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events hci_cmd_timeout Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443 hci_cmd_timeout+0x1ae/0x1c0 net/bluetooth/hci_core.c:2574 process_one_work+0x864/0x1570 kernel/workqueue.c:2152 worker_thread+0x64c/0x1130 kernel/workqueue.c:2295 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Allocated by task 1713: __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:339 [inline] hci_prepare_cmd+0x2a/0x290 net/bluetooth/hci_request.c:292 hci_req_add_ev+0xdc/0x220 net/bluetooth/hci_request.c:326 __hci_cmd_sync_ev+0x119/0x670 net/bluetooth/hci_request.c:138 btintel_enter_mfg+0x2a/0x90 drivers/bluetooth/btintel.c:82 ag6xx_setup+0xfc/0x790 drivers/bluetooth/hci_ag6xx.c:180 hci_uart_setup+0x1b1/0x470 drivers/bluetooth/hci_ldisc.c:431 hci_dev_do_open+0x360/0x1260 net/bluetooth/hci_core.c:1423 hci_power_on+0x117/0x530 net/bluetooth/hci_core.c:2130 process_one_work+0x864/0x1570 kernel/workqueue.c:2152 worker_thread+0x64c/0x1130 kernel/workqueue.c:2295 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Freed by task 1713: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x6de/0x920 net/core/skbuff.c:583 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] kfree_skb+0x11a/0x3d0 net/core/skbuff.c:672 hci_dev_do_open+0xaf0/0x1260 net/bluetooth/hci_core.c:1509 hci_power_on+0x117/0x530 net/bluetooth/hci_core.c:2130 process_one_work+0x864/0x1570 kernel/workqueue.c:2152 worker_thread+0x64c/0x1130 kernel/workqueue.c:2295 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff88809a73e840 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 8 bytes inside of 512-byte region [ffff88809a73e840, ffff88809a73ea40) The buggy address belongs to the page: page:ffffea000269cf80 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea000254afc8 ffffea0002d14d88 ffff88813bff0940 raw: 0000000000000000 ffff88809a73e0c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809a73e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809a73e780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88809a73e800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff88809a73e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809a73e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================