binder: 18571:18588 got transaction with invalid offsets ptr
binder: 18571:18588 transaction failed 29201/-14, size 112-24 line 3305
==================================================================
BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60 block/genhd.c:1543
Read of size 8 at addr ffff8801d707e2e8 by task syz-executor.1/18599

CPU: 0 PID: 18599 Comm: syz-executor.1 Not tainted 4.4.174+ #17
 0000000000000000 9d17b07e77b47886 ffff8800b41676c0 ffffffff81aad1a1
 0000000000000000 ffffea00075c1e00 ffff8801d707e2e8 0000000000000008
 0000000000000000 ffff8800b41676f8 ffffffff81490120 0000000000000000
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff81490120>] print_address_description+0x6f/0x21b mm/kasan/report.c:252
 [<ffffffff81490358>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81490358>] kasan_report mm/kasan/report.c:408 [inline]
 [<ffffffff81490358>] kasan_report.cold+0x8c/0x2be mm/kasan/report.c:393
 [<ffffffff81484ed4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff81a82965>] disk_unblock_events+0x55/0x60 block/genhd.c:1543
 [<ffffffff8154efcc>] __blkdev_get+0x70c/0xdf0 fs/block_dev.c:1297
 [<ffffffff81551938>] blkdev_get+0x2e8/0x920 fs/block_dev.c:1353
 [<ffffffff8155219a>] blkdev_open+0x1aa/0x250 fs/block_dev.c:1508
 [<ffffffff8149154f>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
 [<ffffffff81494d3b>] vfs_open+0x10b/0x210 fs/open.c:862
 [<ffffffff814c5ddf>] do_last fs/namei.c:3269 [inline]
 [<ffffffff814c5ddf>] path_openat+0x136f/0x4470 fs/namei.c:3406
 [<ffffffff814ccab1>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
 [<ffffffff81495668>] do_sys_open+0x2f8/0x600 fs/open.c:1038
 [<ffffffff81599c4a>] C_SYSC_open fs/compat.c:1092 [inline]
 [<ffffffff81599c4a>] compat_SyS_open+0x2a/0x40 fs/compat.c:1090
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a

Allocated by task 18588:
 [<ffffffff8102e3c6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff81483f22>] save_stack mm/kasan/kasan.c:512 [inline]
 [<ffffffff81483f22>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff81483f22>] kasan_kmalloc.part.0+0x62/0xf0 mm/kasan/kasan.c:616
 [<ffffffff81484197>] kasan_kmalloc+0xb7/0xd0 mm/kasan/kasan.c:601
 [<ffffffff814801a3>] kmem_cache_alloc_trace+0x123/0x2d0 mm/slub.c:2642
 [<ffffffff81a81b50>] kmem_cache_alloc_node_trace include/linux/slab.h:367 [inline]
 [<ffffffff81a81b50>] kmalloc_node include/linux/slab.h:514 [inline]
 [<ffffffff81a81b50>] kzalloc_node include/linux/slab.h:631 [inline]
 [<ffffffff81a81b50>] alloc_disk_node+0x50/0x3c0 block/genhd.c:1282
 [<ffffffff81a81edb>] alloc_disk+0x1b/0x20 block/genhd.c:1274
 [<ffffffff81d436d0>] loop_add+0x380/0x830 drivers/block/loop.c:1857
 [<ffffffff81d440a8>] loop_control_ioctl+0x138/0x2f0 drivers/block/loop.c:1988
 [<ffffffff8159b2c3>] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline]
 [<ffffffff8159b2c3>] compat_SyS_ioctl+0x403/0x2210 fs/compat_ioctl.c:1544
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a

Freed by task 18599:
 [<ffffffff8102e3c6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff81484820>] save_stack mm/kasan/kasan.c:512 [inline]
 [<ffffffff81484820>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff81484820>] kasan_slab_free+0xb0/0x190 mm/kasan/kasan.c:589
 [<ffffffff81481c44>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff81481c44>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff81481c44>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff81481c44>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff81a80375>] disk_release+0x255/0x330 block/genhd.c:1118
 [<ffffffff81cf785d>] device_release+0x7d/0x220 drivers/base/core.c:247
 [<ffffffff81ab309c>] kobject_cleanup lib/kobject.c:643 [inline]
 [<ffffffff81ab309c>] kobject_release lib/kobject.c:672 [inline]
 [<ffffffff81ab309c>] kref_sub include/linux/kref.h:73 [inline]
 [<ffffffff81ab309c>] kref_put include/linux/kref.h:98 [inline]
 [<ffffffff81ab309c>] kobject_put+0x14c/0x260 lib/kobject.c:689
 [<ffffffff81a7e013>] put_disk+0x23/0x30 block/genhd.c:1346
 [<ffffffff8154ef2c>] __blkdev_get+0x66c/0xdf0 fs/block_dev.c:1290
 [<ffffffff81551938>] blkdev_get+0x2e8/0x920 fs/block_dev.c:1353
 [<ffffffff8155219a>] blkdev_open+0x1aa/0x250 fs/block_dev.c:1508
 [<ffffffff8149154f>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
 [<ffffffff81494d3b>] vfs_open+0x10b/0x210 fs/open.c:862
 [<ffffffff814c5ddf>] do_last fs/namei.c:3269 [inline]
 [<ffffffff814c5ddf>] path_openat+0x136f/0x4470 fs/namei.c:3406
 [<ffffffff814ccab1>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
 [<ffffffff81495668>] do_sys_open+0x2f8/0x600 fs/open.c:1038
 [<ffffffff81599c4a>] C_SYSC_open fs/compat.c:1092 [inline]
 [<ffffffff81599c4a>] compat_SyS_open+0x2a/0x40 fs/compat.c:1090
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a

The buggy address belongs to the object at ffff8801d707dd80
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1384 bytes inside of
 2048-byte region [ffff8801d707dd80, ffff8801d707e580)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
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: 18583 Comm: syz-executor.1 Not tainted 4.4.174+ #17
task: ffff8801bd360000 task.stack: ffff88019e0e8000
RIP: 0010:[<ffffffff81abe481>]  [<ffffffff81abe481>] __rb_insert lib/rbtree.c:118 [inline]
RIP: 0010:[<ffffffff81abe481>]  [<ffffffff81abe481>] rb_insert_color+0x71/0x9d0 lib/rbtree.c:420
RSP: 0018:ffff8801db707d18  EFLAGS: 00010006
RAX: 0800000000000811 RBX: ffffea00075c1e00 RCX: 1ffffd4000eb83c1
RDX: 1ffff1003b6e3318 RSI: ffff8801db719390 RDI: ffff8801db7198c0
RBP: ffff8801db707d58 R08: ffffffff840ebd88 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 4000000000004080
R13: ffff8801db7198c0 R14: dffffc0000000000 R15: 4000000000004088
FS:  0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000f5538b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020ed11ff CR3: 00000001d07ee000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff81b0abec ffffffff82fb8bc0 0000000000000001 ffff8801db719390
 ffff8801db7198c0 dffffc0000000000 000000698e5c9c00 ffffea00075c1e08
 ffff8801db707d98 ffffffff81ac9ff8 ffff8801db719390 ffff8801db719380
Call Trace:
 <IRQ> 
 [<ffffffff81ac9ff8>] timerqueue_add+0x1a8/0x320 lib/timerqueue.c:57
 [<ffffffff8125e6ac>] enqueue_hrtimer+0x15c/0x450 kernel/time/hrtimer.c:893
 [<ffffffff8125fd6a>] __run_hrtimer kernel/time/hrtimer.c:1276 [inline]
 [<ffffffff8125fd6a>] __hrtimer_run_queues+0x65a/0xfc0 kernel/time/hrtimer.c:1325
 [<ffffffff81262756>] hrtimer_interrupt+0x1b6/0x450 kernel/time/hrtimer.c:1359
 [<ffffffff8108a9d6>] local_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:901
 [<ffffffff8271b249>] smp_apic_timer_interrupt+0x79/0xb0 arch/x86/kernel/apic/apic.c:925
 [<ffffffff8271a59d>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:768
 <EOI> 
 [<ffffffff81299a20>] smp_call_function_many+0x5c0/0x730 kernel/smp.c:435
 [<ffffffff810bbc70>] native_flush_tlb_others+0x110/0x710 arch/x86/mm/tlb.c:325
 [<ffffffff810bc37e>] flush_tlb_others arch/x86/include/asm/paravirt.h:338 [inline]
 [<ffffffff810bc37e>] flush_tlb_mm_range+0x10e/0x550 arch/x86/mm/tlb.c:391
 [<ffffffff81461f77>] flush_tlb_page arch/x86/include/asm/tlbflush.h:300 [inline]
 [<ffffffff81461f77>] ptep_clear_flush+0xe7/0x120 mm/pgtable-generic.c:80
 [<ffffffff81430223>] wp_page_copy.isra.0+0x6e3/0xc70 mm/memory.c:2202
 [<ffffffff81433bda>] do_wp_page+0x23a/0x1340 mm/memory.c:2441
 [<ffffffff8143b2e4>] handle_pte_fault mm/memory.c:3362 [inline]
 [<ffffffff8143b2e4>] __handle_mm_fault mm/memory.c:3474 [inline]
 [<ffffffff8143b2e4>] handle_mm_fault+0x1614/0x3140 mm/memory.c:3503
 [<ffffffff810aaa4e>] __do_page_fault+0x28e/0x7f0 arch/x86/mm/fault.c:1243
 [<ffffffff810ab008>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1306
 [<ffffffff82719e35>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:1064
 [<ffffffff814b17a4>] pipe_read+0x274/0x860 fs/pipe.c:270
 [<ffffffff81496725>] new_sync_read fs/read_write.c:424 [inline]
 [<ffffffff81496725>] __vfs_read+0x2e5/0x3c0 fs/read_write.c:436
 [<ffffffff81498264>] vfs_read+0x134/0x360 fs/read_write.c:456
 [<ffffffff8149aa8c>] SYSC_read fs/read_write.c:571 [inline]
 [<ffffffff8149aa8c>] SyS_read+0xdc/0x1c0 fs/read_write.c:564
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
Code: 48 89 d8 48 c1 e8 03 42 80 3c 30 00 0f 85 d0 05 00 00 4c 8b 23 41 f6 c4 01 0f 85 7f 01 00 00 4d 8d 7c 24 08 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 c1 05 00 00 49 8b 7c 24 08 48 39 df 0f 84 
RIP  [<ffffffff81abe481>] __rb_insert lib/rbtree.c:118 [inline]
RIP  [<ffffffff81abe481>] rb_insert_color+0x71/0x9d0 lib/rbtree.c:420
 RSP <ffff8801db707d18>
---[ end trace 82d205890ac5c7f2 ]---