slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3367 [inline] kmem_cache_alloc_trace+0x2d1/0x760 mm/slab.c:3607 kmalloc include/linux/slab.h:545 [inline] kzalloc include/linux/slab.h:740 [inline] hci_alloc_dev+0x43/0x1d00 net/bluetooth/hci_core.c:3116 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:623 [inline] hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:693 [inline] hci_uart_tty_ioctl+0x321/0xa70 drivers/bluetooth/hci_ldisc.c:748 kasan: GPF could be caused by NULL-ptr deref or user memory access tty_ioctl+0xac9/0x14d0 drivers/tty/tty_io.c:2662 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.0.0-rc5 #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events hci_uart_write_work RIP: 0010:hci_uart_write_work+0x1b6/0x710 drivers/bluetooth/hci_ldisc.c:180 Code: 0f 85 6a 04 00 00 49 8b b4 24 c8 00 00 00 4c 89 ef e8 ce 9c 53 02 89 c6 48 8b 45 d0 48 8d b8 5c 10 00 00 48 89 f8 48 c1 e8 03 <0f> b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1d RSP: 0018:ffff8880a9867cb0 EFLAGS: 00010203 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 RAX: 000000000000020b RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000000000000105c RBP: ffff8880a9867d30 R08: ffff8880a9854140 R09: ffff8880a9854a08 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808e586640 R13: ffff888056599540 R14: ffff888082ba7828 R15: ffff88808e5866b0 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000070a158 CR3: 000000005c9e4000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 entry_SYSCALL_64_after_hwframe+0x49/0xbe kthread+0x357/0x430 kernel/kthread.c:246 RIP: 0033:0x457e39 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe2ae227c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 RAX: ffffffffffffffda RBX: 00007fe2ae227c90 RCX: 0000000000457e39 Modules linked in: RDX: 0000000000000002 RSI: 00000000400455c8 RDI: 0000000000000005 ---[ end trace d00373122bcbc790 ]--- RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2ae2286d4 R13: 00000000004c06e7 R14: 00000000004d22d0 R15: 0000000000000006 RIP: 0010:hci_uart_write_work+0x1b6/0x710 drivers/bluetooth/hci_ldisc.c:180 Bluetooth: Invalid header checksum Code: 0f 85 6a 04 00 00 49 8b b4 24 c8 00 00 00 4c 89 ef e8 ce 9c 53 02 89 c6 48 8b 45 d0 48 8d b8 5c 10 00 00 48 89 f8 48 c1 e8 03 <0f> b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1d Bluetooth: Can't allocate HCI device kobject: 'loop3' (000000003d5bdadd): kobject_uevent_env audit: type=1400 audit(1549355492.784:79): avc: denied { map } for pid=10208 comm="syz-executor3" path="/dev/rfkill" dev="devtmpfs" ino=1042 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:wireless_device_t:s0 tclass=chr_file permissive=1 kobject: 'loop3' (000000003d5bdadd): fill_kobj_path: path = '/devices/virtual/block/loop3' RSP: 0018:ffff8880a9867cb0 EFLAGS: 00010203 RAX: 000000000000020b RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000000000000105c RBP: ffff8880a9867d30 R08: ffff8880a9854140 R09: ffff8880a9854a08 kobject: 'loop4' (00000000ac598a95): kobject_uevent_env R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808e586640 kobject: 'loop4' (00000000ac598a95): fill_kobj_path: path = '/devices/virtual/block/loop4' R13: ffff888056599540 R14: ffff888082ba7828 R15: ffff88808e5866b0 kobject: 'loop5' (00000000cca2e330): kobject_uevent_env FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 kobject: 'loop5' (00000000cca2e330): fill_kobj_path: path = '/devices/virtual/block/loop5' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000136f3a8 CR3: 00000000822b8000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop2' (00000000dc5e8202): kobject_uevent_env