android-4.4 boot error: general protection fault in corrupted

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: f44df02c ANDROID: overlayfs: override_creds=off option byp..
git tree: android-4.4
console output: https://syzkaller.appspot.com/x/log.txt?x=1310a49d200000
kernel config: https://syzkaller.appspot.com/x/.config?x=7407c3a2cffb1985
dashboard link: https://syzkaller.appspot.com/bug?extid=b09450c776174ee2299b
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+b09450...@syzkaller.appspotmail.com

sda: sda1
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
ion_heap_create: Heap type is disabled: 1
kasan: CONFIG_KASAN_INLINE enabled[ 3.357027] sd 0:0:1:0: [sda] Attached
SCSI disk
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral
protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.4.176+ #45
==================================================================
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 ffff8801d8036fb4 by task system/344

CPU: 0 PID: 344 Comm: system Not tainted 4.4.176+ #45
0000000000000000 777772bd6cf362ee ffff8800b9f57ba8 ffffffff81aad8d1
0000000000000000 ffffea0007600d80 ffff8801d8036fb4 0000000000000004
ffff8801da5ff980 ffff8800b9f57be0 ffffffff81490790 0000000000000000
Call Trace:
[<ffffffff81aad8d1>] __dump_stack lib/dump_stack.c:15 [inline]
[<ffffffff81aad8d1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
[<ffffffff81490790>] print_address_description+0x6f/0x21b
mm/kasan/report.c:252
[<ffffffff814909c8>] kasan_report_error mm/kasan/report.c:351 [inline]
[<ffffffff814909c8>] kasan_report mm/kasan/report.c:408 [inline]
[<ffffffff814909c8>] kasan_report.cold+0x8c/0x2be mm/kasan/report.c:393
[<ffffffff81485524>] __asan_report_load4_noabort+0x14/0x20
mm/kasan/report.c:428
[<ffffffff8120ef16>] debug_spin_lock_before
kernel/locking/spinlock_debug.c:83 [inline]
[<ffffffff8120ef16>] do_raw_spin_lock+0x2e6/0x370
kernel/locking/spinlock_debug.c:135
[<ffffffff82718980>] __raw_spin_lock include/linux/spinlock_api_smp.h:145
[inline]
[<ffffffff82718980>] _raw_spin_lock+0x40/0x50 kernel/locking/spinlock.c:151
[<ffffffff82113110>] spin_lock include/linux/spinlock.h:302 [inline]
[<ffffffff82113110>] ion_heap_freelist_size
drivers/staging/android/ion/ion_heap.c:176 [inline]
[<ffffffff82113110>] ion_heap_deferred_free+0x100/0x500
drivers/staging/android/ion/ion_heap.c:232
[<ffffffff81134883>] kthread+0x273/0x310 kernel/kthread.c:211
[<ffffffff82719c85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537

Allocated by task 1:
[<ffffffff8102e3c6>] save_stack_trace+0x26/0x50
arch/x86/kernel/stacktrace.c:63
[<ffffffff81484592>] save_stack mm/kasan/kasan.c:512 [inline]
[<ffffffff81484592>] set_track mm/kasan/kasan.c:524 [inline]
[<ffffffff81484592>] kasan_kmalloc.part.0+0x62/0xf0 mm/kasan/kasan.c:616
[<ffffffff81484807>] kasan_kmalloc+0xb7/0xd0 mm/kasan/kasan.c:601
[<ffffffff81480813>] kmem_cache_alloc_trace+0x123/0x2d0 mm/slub.c:2642
[<ffffffff82116bfb>] kmalloc include/linux/slab.h:476 [inline]
[<ffffffff82116bfb>] kzalloc include/linux/slab.h:620 [inline]
[<ffffffff82116bfb>] ion_system_heap_create+0x4b/0x2c0
drivers/staging/android/ion/ion_system_heap.c:283
[<ffffffff82113666>] ion_heap_create+0x156/0x1b0
drivers/staging/android/ion/ion_heap.c:328
[<ffffffff8324cc91>] ion_dummy_init+0x1e5/0x36d
drivers/staging/android/ion/ion_dummy_driver.c:106
[<ffffffff810003fb>] do_one_initcall+0x13b/0x260 init/main.c:793
[<ffffffff831d5bce>] do_initcall_level init/main.c:858 [inline]
[<ffffffff831d5bce>] do_initcalls init/main.c:866 [inline]
[<ffffffff831d5bce>] do_basic_setup init/main.c:884 [inline]
[<ffffffff831d5bce>] kernel_init_freeable+0x2fa/0x3c3 init/main.c:1029
[<ffffffff827062f4>] kernel_init+0x12/0x15e init/main.c:957
[<ffffffff82719c85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537

Freed by task 1:
[<ffffffff8102e3c6>] save_stack_trace+0x26/0x50
arch/x86/kernel/stacktrace.c:63
[<ffffffff81484e90>] save_stack mm/kasan/kasan.c:512 [inline]
[<ffffffff81484e90>] set_track mm/kasan/kasan.c:524 [inline]
[<ffffffff81484e90>] kasan_slab_free+0xb0/0x190 mm/kasan/kasan.c:589
[<ffffffff814822b4>] slab_free_hook mm/slub.c:1383 [inline]
[<ffffffff814822b4>] slab_free_freelist_hook mm/slub.c:1405 [inline]
[<ffffffff814822b4>] slab_free mm/slub.c:2859 [inline]
[<ffffffff814822b4>] kfree+0xf4/0x310 mm/slub.c:3749
[<ffffffff82116f0a>] ion_system_heap_destroy+0x9a/0xc0
drivers/staging/android/ion/ion_system_heap.c:323
[<ffffffff8211372a>] ion_heap_destroy+0x6a/0xd0
drivers/staging/android/ion/ion_heap.c:369
[<ffffffff8324cd6d>] ion_dummy_init+0x2c1/0x36d
drivers/staging/android/ion/ion_dummy_driver.c:116
[<ffffffff810003fb>] do_one_initcall+0x13b/0x260 init/main.c:793
[<ffffffff831d5bce>] do_initcall_level init/main.c:858 [inline]
[<ffffffff831d5bce>] do_initcalls init/main.c:866 [inline]
[<ffffffff831d5bce>] do_basic_setup init/main.c:884 [inline]
[<ffffffff831d5bce>] kernel_init_freeable+0x2fa/0x3c3 init/main.c:1029
[<ffffffff827062f4>] kernel_init+0x12/0x15e init/main.c:957
[<ffffffff82719c85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537

The buggy address belongs to the object at ffff8801d8036f00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 180 bytes inside of
512-byte region [ffff8801d8036f00, ffff8801d8037100)
The buggy address belongs to the page:
task: ffff8801da5f0000 task.stack: ffff8801da5f8000
RIP: 0010:[<ffffffff821136f2>] [<ffffffff821136f2>]
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: ffffffff821136dc RDI: 000000000000001a
RBP: ffff8801da5ffdb8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffea
R13: ffff8801d7d48728 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
Stack:
dffffc0000000000 ffffffffffffffea ffff8801da5ffdf0 ffffffff8324cd6d
ffffffff82e11080 ffff8800ba1d6820 dffffc0000000000 ffffffff8324caac
ffff8801da5ffeb0 ffff8801da5ffed8 ffffffff810003fb 0000000082ab1ce0
Call Trace:
[<ffffffff8324cd6d>] ion_dummy_init+0x2c1/0x36d
drivers/staging/android/ion/ion_dummy_driver.c:116
[<ffffffff810003fb>] do_one_initcall+0x13b/0x260 init/main.c:793
[<ffffffff831d5bce>] do_initcall_level init/main.c:858 [inline]
[<ffffffff831d5bce>] do_initcalls init/main.c:866 [inline]
[<ffffffff831d5bce>] do_basic_setup init/main.c:884 [inline]
[<ffffffff831d5bce>] kernel_init_freeable+0x2fa/0x3c3 init/main.c:1029
[<ffffffff827062f4>] kernel_init+0x12/0x15e init/main.c:957
[<ffffffff82719c85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537
Code: 89 fc 48 83 ec 08 e8 de 64 1f ff 4d 85 e4 74 53 e8 d4 64 1f 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 [<ffffffff821136f2>] ion_heap_destroy+0x32/0xd0
drivers/staging/android/ion/ion_heap.c:363
RSP <ffff8801da5ffda8>
---[ end trace bf2314c5c832255c ]---


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.