================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:406 [inline] BUG: KASAN: slab-out-of-bounds in hci_inquiry_result_evt net/bluetooth/hci_event.c:2538 [inline] BUG: KASAN: slab-out-of-bounds in hci_event_packet+0xb2d/0x86f5 net/bluetooth/hci_event.c:6029 Read of size 3 at addr ffff8880a6b135ff by task kworker/u5:0/1536 CPU: 0 PID: 1536 Comm: kworker/u5:0 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci1 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memcpy+0x20/0x60 mm/kasan/common.c:105 memcpy include/linux/string.h:406 [inline] hci_inquiry_result_evt net/bluetooth/hci_event.c:2538 [inline] hci_event_packet+0xb2d/0x86f5 net/bluetooth/hci_event.c:6029 hci_rx_work+0x22e/0xb10 net/bluetooth/hci_core.c:4705 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Allocated by task 8700: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xae/0x550 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:377 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline] vhci_write+0xbd/0x450 drivers/bluetooth/hci_vhci.c:285 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write+0x422/0x650 fs/read_write.c:503 vfs_write+0x59d/0x6b0 fs/read_write.c:578 ksys_write+0x12d/0x250 fs/read_write.c:631 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 7166: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] kasan_set_free_info mm/kasan/common.c:316 [inline] __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455 __cache_free mm/slab.c:3426 [inline] kfree+0x103/0x2c0 mm/slab.c:3757 tomoyo_supervisor+0x350/0xeb0 security/tomoyo/common.c:2149 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x25c/0x360 security/tomoyo/file.c:573 tomoyo_path_perm+0x2e7/0x3f0 security/tomoyo/file.c:838 tomoyo_path_unlink+0x8e/0xd0 security/tomoyo/tomoyo.c:150 security_path_unlink+0xd7/0x150 security/security.c:1100 do_unlinkat+0x375/0x660 fs/namei.c:3886 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff8880a6b13400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 511 bytes inside of 512-byte region [ffff8880a6b13400, ffff8880a6b13600) The buggy address belongs to the page: page:ffffea00029ac4c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a6b13000 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00023faec8 ffffea00023b3fc8 ffff8880aa000a80 raw: ffff8880a6b13000 ffff8880a6b13000 0000000100000002 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a6b13500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a6b13580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a6b13600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a6b13680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a6b13700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================