Bluetooth: Invalid header checksum Bluetooth: Invalid header checksum Bluetooth: Invalid header checksum Bluetooth: Invalid header checksum ================================================================== BUG: KASAN: use-after-free in h5_rx_3wire_hdr+0x349/0x370 /drivers/bluetooth/hci_h5.c:400 Read of size 8 at addr ffff888099a7f498 by task syz-executor.4/10076 Bluetooth: Invalid header checksum CPU: 0 PID: 10076 Comm: syz-executor.4 Not tainted 4.14.133 #28 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack /lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c /lib/dump_stack.c:53 print_address_description.cold+0x7c/0x1dc /mm/kasan/report.c:252 kasan_report_error /mm/kasan/report.c:351 [inline] kasan_report /mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af /mm/kasan/report.c:393 __asan_report_load8_noabort+0x14/0x20 /mm/kasan/report.c:430 h5_rx_3wire_hdr+0x349/0x370 /drivers/bluetooth/hci_h5.c:400 h5_recv+0x25c/0x3f0 /drivers/bluetooth/hci_h5.c:532 Bluetooth: Invalid header checksum hci_uart_tty_receive+0x1f4/0x4d0 /drivers/bluetooth/hci_ldisc.c:603 Bluetooth: Invalid header checksum tiocsti /drivers/tty/tty_io.c:2186 [inline] tty_ioctl+0xded/0x1320 /drivers/tty/tty_io.c:2572 Bluetooth: Invalid header checksum vfs_ioctl /fs/ioctl.c:46 [inline] file_ioctl /fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 /fs/ioctl.c:684 Bluetooth: Invalid header checksum Bluetooth: Invalid header checksum SYSC_ioctl /fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 /fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 /arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459819 RSP: 002b:00007f4665930c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459819 Bluetooth: Invalid header checksum RDX: 0000000020000080 RSI: 0000000000005412 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f46659316d4 R13: 00000000004c408a R14: 00000000004d7ff0 R15: 00000000ffffffff Bluetooth: Invalid header checksum Allocated by task 22: save_stack_trace+0x16/0x20 /arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 /mm/kasan/kasan.c:447 set_track /mm/kasan/kasan.c:459 [inline] kasan_kmalloc /mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 /mm/kasan/kasan.c:529 kasan_slab_alloc+0xf/0x20 /mm/kasan/kasan.c:489 kmem_cache_alloc_node+0x144/0x780 /mm/slab.c:3642 __alloc_skb+0x9c/0x500 /net/core/skbuff.c:193 alloc_skb /./include/linux/skbuff.h:980 [inline] bt_skb_alloc /./include/net/bluetooth/bluetooth.h:336 [inline] h5_rx_pkt_start+0xc2/0x260 /drivers/bluetooth/hci_h5.c:443 h5_recv+0x25c/0x3f0 /drivers/bluetooth/hci_h5.c:532 Bluetooth: Invalid header checksum hci_uart_tty_receive+0x1f4/0x4d0 /drivers/bluetooth/hci_ldisc.c:603 tty_ldisc_receive_buf+0x14d/0x1a0 /drivers/tty/tty_buffer.c:459 tty_port_default_receive_buf+0x73/0xa0 /drivers/tty/tty_port.c:37 receive_buf /drivers/tty/tty_buffer.c:475 [inline] flush_to_ldisc+0x1ec/0x400 /drivers/tty/tty_buffer.c:527 process_one_work+0x863/0x1600 /kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 /kernel/workqueue.c:2248 kthread+0x319/0x430 /kernel/kthread.c:232 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:404 Freed by task 22: save_stack_trace+0x16/0x20 /arch/x86/kernel/stacktrace.c:59 Bluetooth: Invalid header checksum save_stack+0x45/0xd0 /mm/kasan/kasan.c:447 set_track /mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 /mm/kasan/kasan.c:524 __cache_free /mm/slab.c:3496 [inline] kmem_cache_free+0x83/0x2b0 /mm/slab.c:3758 kfree_skbmem /net/core/skbuff.c:586 [inline] kfree_skbmem+0xac/0x120 /net/core/skbuff.c:580 __kfree_skb /net/core/skbuff.c:646 [inline] kfree_skb+0xbd/0x340 /net/core/skbuff.c:663 h5_reset_rx+0x4c/0x100 /drivers/bluetooth/hci_h5.c:499 h5_rx_3wire_hdr+0x2af/0x370 /drivers/bluetooth/hci_h5.c:409 h5_recv+0x25c/0x3f0 /drivers/bluetooth/hci_h5.c:532 hci_uart_tty_receive+0x1f4/0x4d0 /drivers/bluetooth/hci_ldisc.c:603 tty_ldisc_receive_buf+0x14d/0x1a0 /drivers/tty/tty_buffer.c:459 Bluetooth: Invalid header checksum tty_port_default_receive_buf+0x73/0xa0 /drivers/tty/tty_port.c:37 Bluetooth: Invalid header checksum receive_buf /drivers/tty/tty_buffer.c:475 [inline] flush_to_ldisc+0x1ec/0x400 /drivers/tty/tty_buffer.c:527 process_one_work+0x863/0x1600 /kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 /kernel/workqueue.c:2248 kthread+0x319/0x430 /kernel/kthread.c:232 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:404 The buggy address belongs to the object at ffff888099a7f3c0 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 216 bytes inside of 232-byte region [ffff888099a7f3c0, ffff888099a7f4a8) The buggy address belongs to the page: page:ffffea0002669fc0 count:1 mapcount:0 mapping:ffff888099a7f000 index:0x0 Bluetooth: Invalid header checksum flags: 0x1fffc0000000100(slab) raw: 01fffc0000000100 ffff888099a7f000 0000000000000000 000000010000000c raw: ffffea0002a32f60 ffffea0002a42860 ffff88821b757240 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888099a7f380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb Bluetooth: Invalid header checksum ffff888099a7f400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888099a7f480: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ^ ffff888099a7f500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888099a7f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ================================================================== Bluetooth: Invalid header checksum