syzbot

hidraw: raw HID events driver (C) Jiri Kosina
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
ion_heap_create: Heap type is disabled: 1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP [    4.029143] ==================================================================
BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock+0x2e6/0x370 kernel/locking/spinlock_debug.c:135
Read of size 4 at addr ffff8800b9e665b4 by task system/344

CPU: 0 PID: 344 Comm: system Not tainted 4.4.205-syzkaller #0
 0000000000000000 6ae7c97d3f600066 ffff8801d7ee7bb8 ffffffff81a5ec4b
 0000000000000000 ffffea0002e79980 ffff8800b9e665b4 0000000000000004
 ffff8801da5ff980 ffff8801d7ee7bf0 ffffffff81475901 0000000000000000
Call Trace:
 [<ffffffff81a5ec4b>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81a5ec4b>] dump_stack+0xcb/0x130 lib/dump_stack.c:56
 [<ffffffff81475901>] print_address_description+0x6f/0x21b mm/kasan/report.c:252
 [<ffffffff81475b39>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81475b39>] kasan_report mm/kasan/report.c:408 [inline]
 [<ffffffff81475b39>] kasan_report.cold+0x8c/0x2be mm/kasan/report.c:393
 [<ffffffff8146a944>] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:428
 [<ffffffff8120a756>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff8120a756>] do_raw_spin_lock+0x2e6/0x370 kernel/locking/spinlock_debug.c:135
 [<ffffffff826a42f0>] __raw_spin_lock include/linux/spinlock_api_smp.h:145 [inline]
 [<ffffffff826a42f0>] _raw_spin_lock+0x40/0x50 kernel/locking/spinlock.c:151
 [<ffffffff820adbe0>] spin_lock include/linux/spinlock.h:302 [inline]
 [<ffffffff820adbe0>] ion_heap_freelist_size drivers/staging/android/ion/ion_heap.c:176 [inline]
 [<ffffffff820adbe0>] ion_heap_deferred_free+0x100/0x3c0 drivers/staging/android/ion/ion_heap.c:232
 [<ffffffff81132cc3>] kthread+0x273/0x310 kernel/kthread.c:211
 [<ffffffff826a55c5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510

Allocated by task 1:
 [<ffffffff8102f176>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814699b2>] save_stack mm/kasan/kasan.c:512 [inline]
 [<ffffffff814699b2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814699b2>] kasan_kmalloc.part.0+0x62/0xf0 mm/kasan/kasan.c:616
 [<ffffffff81469c27>] kasan_kmalloc+0xb7/0xd0 mm/kasan/kasan.c:601
 [<ffffffff81465d43>] kmem_cache_alloc_trace+0x123/0x2d0 mm/slub.c:2642
 [<ffffffff820b10bb>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff820b10bb>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff820b10bb>] ion_system_heap_create+0x4b/0x2c0 drivers/staging/android/ion/ion_system_heap.c:283
 [<ffffffff820adff6>] ion_heap_create+0x156/0x1b0 drivers/staging/android/ion/ion_heap.c:328
 [<ffffffff8324d804>] ion_dummy_init+0x1e5/0x36d drivers/staging/android/ion/ion_dummy_driver.c:106
 [<ffffffff810004ab>] do_one_initcall+0x13b/0x260 init/main.c:793
 [<ffffffff831d5b01>] do_initcall_level init/main.c:858 [inline]
 [<ffffffff831d5b01>] do_initcalls init/main.c:866 [inline]
 [<ffffffff831d5b01>] do_basic_setup init/main.c:884 [inline]
 [<ffffffff831d5b01>] kernel_init_freeable+0x2fa/0x3c3 init/main.c:1029
 [<ffffffff82692f74>] kernel_init+0x12/0x15e init/main.c:957
 [<ffffffff826a55c5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510

Freed by task 1:
 [<ffffffff8102f176>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff8146a2b0>] save_stack mm/kasan/kasan.c:512 [inline]
 [<ffffffff8146a2b0>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff8146a2b0>] kasan_slab_free+0xb0/0x190 mm/kasan/kasan.c:589
 [<ffffffff81467794>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff81467794>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff81467794>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff81467794>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff820b13ca>] ion_system_heap_destroy+0x9a/0xc0 drivers/staging/android/ion/ion_system_heap.c:323
 [<ffffffff820ae0ba>] ion_heap_destroy+0x6a/0xd0 drivers/staging/android/ion/ion_heap.c:369
 [<ffffffff8324d8e0>] ion_dummy_init+0x2c1/0x36d drivers/staging/android/ion/ion_dummy_driver.c:116
 [<ffffffff810004ab>] do_one_initcall+0x13b/0x260 init/main.c:793
 [<ffffffff831d5b01>] do_initcall_level init/main.c:858 [inline]
 [<ffffffff831d5b01>] do_initcalls init/main.c:866 [inline]
 [<ffffffff831d5b01>] do_basic_setup init/main.c:884 [inline]
 [<ffffffff831d5b01>] kernel_init_freeable+0x2fa/0x3c3 init/main.c:1029
 [<ffffffff82692f74>] kernel_init+0x12/0x15e init/main.c:957
 [<ffffffff826a55c5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510

The buggy address belongs to the object at ffff8800b9e66500
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 180 bytes inside of
 512-byte region [ffff8800b9e66500, ffff8800b9e66700)
The buggy address belongs to the page:
KASAN
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.4.205-syzkaller #0
task: ffff8801da5f0000 task.stack: ffff8801da5f8000
RIP: 0010:[<ffffffff820ae082>]  [<ffffffff820ae082>] ion_heap_destroy+0x32/0xd0 drivers/staging/android/ion/ion_heap.c:363
RSP: 0000:ffff8801da5ffda8  EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffffffff820ae06c RDI: 000000000000001a
RBP: ffff8801da5ffdb8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffea
R13: ffff8801d87a2d58 R14: dffffc0000000000 R15: ffffffffffffffea
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000002e0a000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 dffffc0000000000 ffffffffffffffea ffff8801da5ffdf0 ffffffff8324d8e0
 ffffffff82e11080 ffff8801d7daf180 dffffc0000000000 ffffffff8324d61f
 ffff8801da5ffeb0 ffff8801da5ffed8 ffffffff810004ab 0000000000000001
Call Trace:
 [<ffffffff8324d8e0>] ion_dummy_init+0x2c1/0x36d drivers/staging/android/ion/ion_dummy_driver.c:116
 [<ffffffff810004ab>] do_one_initcall+0x13b/0x260 init/main.c:793
 [<ffffffff831d5b01>] do_initcall_level init/main.c:858 [inline]
 [<ffffffff831d5b01>] do_initcalls init/main.c:866 [inline]
 [<ffffffff831d5b01>] do_basic_setup init/main.c:884 [inline]
 [<ffffffff831d5b01>] kernel_init_freeable+0x2fa/0x3c3 init/main.c:1029
 [<ffffffff82692f74>] kernel_init+0x12/0x15e init/main.c:957
 [<ffffffff826a55c5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: 89 fc 48 83 ec 08 e8 1e d8 24 ff 4d 85 e4 74 53 e8 14 d8 24 ff 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 83 00 00 00 41 8b 54 24 30 
RIP  [<ffffffff820ae082>] ion_heap_destroy+0x32/0xd0 drivers/staging/android/ion/ion_heap.c:363
 RSP <ffff8801da5ffda8>
---[ end trace 70fa483989325142 ]---