================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5651 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x384e/0x3eb0 net/bluetooth/hci_event.c:5922 Read of size 1 at addr ffff8880a8fc9604 by task kworker/u5:1/6865 CPU: 0 PID: 6865 Comm: kworker/u5:1 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci0 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 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5651 [inline] hci_le_meta_evt+0x384e/0x3eb0 net/bluetooth/hci_event.c:5922 hci_event_packet+0x245a/0x86f5 net/bluetooth/hci_event.c:6167 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 6841: 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 6239: 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 security_inode_getattr+0xcf/0x140 security/security.c:1278 vfs_getattr fs/stat.c:121 [inline] vfs_statx_fd+0x70/0xf0 fs/stat.c:151 vfs_fstat include/linux/fs.h:3157 [inline] __do_sys_newfstat+0x88/0x100 fs/stat.c:398 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 ffff8880a8fc9400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 4 bytes to the right of 512-byte region [ffff8880a8fc9400, ffff8880a8fc9600) The buggy address belongs to the page: page:ffffea0002a3f240 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea000271d908 ffffea0002a246c8 ffff8880aa000a80 raw: 0000000000000000 ffff8880a8fc9000 0000000100000004 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a8fc9500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a8fc9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a8fc9600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a8fc9680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a8fc9700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================