Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
==================================================================
BUG: KASAN: use-after-free in drm_getunique+0x19e/0x250 drivers/gpu/drm/drm_ioctl.c:118
Read of size 4 at addr ffff8880ab907018 by task syz-executor.0/12100

CPU: 0 PID: 12100 Comm: syz-executor.0 Not tainted 4.14.231-syzkaller #0
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+0x14b/0x1e7 lib/dump_stack.c:58
 print_address_description.cold.6+0x9/0x1ca 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.7+0x11a/0x2d3 mm/kasan/report.c:393
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
 drm_getunique+0x19e/0x250 drivers/gpu/drm/drm_ioctl.c:118
 drm_ioctl_kernel+0x133/0x1d0 drivers/gpu/drm/drm_ioctl.c:736
 drm_ioctl+0x417/0x900 drivers/gpu/drm/drm_ioctl.c:836
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x465a49
RSP: 002b:00007fa5944bf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055bfe8 RCX: 0000000000465a49
RDX: 0000000020000180 RSI: 00000000c0145401 RDI: 0000000000000003
RBP: 00000000004af682 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bfe8
R13: 00007ffdd1bd7e2f R14: 00007fa5944bf300 R15: 0000000000022000

Allocated by task 12092:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:551
 kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:536
 kmem_cache_alloc_trace+0x152/0x3f0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 drm_master_create drivers/gpu/drm/drm_auth.c:100 [inline]
 drm_new_set_master+0x11c/0x480 drivers/gpu/drm/drm_auth.c:138
 drm_master_open+0xd6/0x110 drivers/gpu/drm/drm_auth.c:236
 drm_open_helper drivers/gpu/drm/drm_file.c:251 [inline]
 drm_open+0x816/0x1010 drivers/gpu/drm/drm_file.c:155
 drm_stub_open+0x267/0x430 drivers/gpu/drm/drm_drv.c:944
 chrdev_open+0x1e9/0x5b0 fs/char_dev.c:423
 do_dentry_open+0x3e4/0xde0 fs/open.c:777
 vfs_open+0xfc/0x240 fs/open.c:888
 do_last fs/namei.c:3428 [inline]
 path_openat+0xb6f/0x2760 fs/namei.c:3569
 do_filp_open+0x16b/0x220 fs/namei.c:3603
 do_sys_open+0x1d0/0x350 fs/open.c:1081
 SYSC_openat fs/open.c:1108 [inline]
 SyS_openat+0xf/0x20 fs/open.c:1102
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 12092:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xab/0x190 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 drm_master_destroy drivers/gpu/drm/drm_auth.c:322 [inline]
 kref_put include/linux/kref.h:70 [inline]
 drm_master_put+0x120/0x170 drivers/gpu/drm/drm_auth.c:333
 drm_new_set_master+0x2e3/0x480 drivers/gpu/drm/drm_auth.c:157
 drm_setmaster_ioctl+0x168/0x1e0 drivers/gpu/drm/drm_auth.c:190
 drm_ioctl_kernel+0x133/0x1d0 drivers/gpu/drm/drm_ioctl.c:736
 drm_ioctl+0x417/0x900 drivers/gpu/drm/drm_ioctl.c:836
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

The buggy address belongs to the object at ffff8880ab907000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 24 bytes inside of
 256-byte region [ffff8880ab907000, ffff8880ab907100)
The buggy address belongs to the page:
page:ffffea0002ae41c0 count:1 mapcount:0 mapping:ffff8880ab907000 index:0xffff8880ab907b40
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff8880ab907000 ffff8880ab907b40 000000010000000b
raw: ffffea0002aea020 ffffea0002ab5aa0 ffff88813fe607c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880ab906f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880ab906f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880ab907000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8880ab907080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880ab907100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
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