audit: type=1800 audit(1590777976.912:1330): pid=32599 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=15900 res=0
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 21060 Comm: kworker/u4:1 Not tainted 4.14.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
task: ffff888054cd41c0 task.stack: ffff888052d70000
RIP: 0010:skb_tail_pointer include/linux/skbuff.h:2017 [inline]
RIP: 0010:skb_put+0x29/0x170 net/core/skbuff.c:1694
RSP: 0018:ffff888052d77b98 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88808bea7a40 RCX: ffff88808a1e5540
RDX: 000000000000001a RSI: 0000000000000001 RDI: 00000000000000d0
RBP: 0000000000000000 R08: 0000000000007156 R09: ffffffff89e8d3f0
R10: ffff888054cd4ae8 R11: ffff888054cd41c0 R12: 0000000000000001
R13: ffff88808bea7a50 R14: 0000000000000001 R15: ffff88808fd90060
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30f23000 CR3: 0000000091f10000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_put_data include/linux/skbuff.h:2097 [inline]
 ll_recv+0x4f5/0x1040 drivers/bluetooth/hci_ll.c:416
 hci_uart_tty_receive+0x1ec/0x4c0 drivers/bluetooth/hci_ldisc.c:616
 tty_ldisc_receive_buf+0x12e/0x170 drivers/tty/tty_buffer.c:459
 tty_port_default_receive_buf+0x6e/0xa0 drivers/tty/tty_port.c:37
 receive_buf drivers/tty/tty_buffer.c:475 [inline]
 flush_to_ldisc+0x1dd/0x3f0 drivers/tty/tty_buffer.c:527
 process_one_work+0x7c0/0x14c0 kernel/workqueue.c:2116
 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 5f 1b 61 fc 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 01 00 00 48 8d bd c8 00 00 00 4c 8b ad d0 
RIP: skb_tail_pointer include/linux/skbuff.h:2017 [inline] RSP: ffff888052d77b98
RIP: skb_put+0x29/0x170 net/core/skbuff.c:1694 RSP: ffff888052d77b98
CPU: 1 PID: 32603 Comm: syz-executor.0 Tainted: G      D         4.14.182-syzkaller #0
Bluetooth: hci3 command 0x1003 tx timeout
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_failslab+0xd6/0x130 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc_node mm/slab.c:3297 [inline]
 kmem_cache_alloc_node+0x54/0x400 mm/slab.c:3640
 __alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193
Bluetooth: hci3 sending frame failed (-49)
 alloc_skb include/linux/skbuff.h:980 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:336 [inline]
 ll_recv+0x3d6/0x1040 drivers/bluetooth/hci_ll.c:516
 hci_uart_tty_receive+0x1ec/0x4c0 drivers/bluetooth/hci_ldisc.c:616
 tiocsti drivers/tty/tty_io.c:2186 [inline]
 tty_ioctl+0xd5f/0x1220 drivers/tty/tty_io.c:2572
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45ca69
RSP: 002b:00007f8a0a12bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004ef140 RCX: 000000000045ca69
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 000000000000058b R14: 00000000004c8452 R15: 00007f8a0a12c6d4
Bluetooth: Can't allocate mem for new packet
---[ end trace 5aa2c3c26bb9bf48 ]---