==================================================================
BUG: KASAN: use-after-free in list_empty include/linux/list.h:189 [inline]
BUG: KASAN: use-after-free in sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
Read of size 8 at addr ffff8800ba18f340 by task syz-executor4/10015

CPU: 0 PID: 10015 Comm: syz-executor4 Not tainted 4.4.113-ge70c132 #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 27508e399694209e ffff8800a889f9f0 ffffffff81d0278d
 ffffea0002e863c0 ffff8800ba18f340 0000000000000000 ffff8800ba18f340
 ffff8800b5bd0238 ffff8800a889fa28 ffffffff814fd053 ffff8800ba18f340
Call Trace:
 [<ffffffff81d0278d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0278d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd053>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd565>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd565>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fd6c4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b6d79>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b6d79>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b72f5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825b919b>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151c561>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151e8bd>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff8151ea38>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff81520d69>] SYSC_readv fs/read_write.c:860 [inline]
 [<ffffffff81520d69>] SyS_readv+0xd9/0x240 fs/read_write.c:852
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 6233:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc0c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc38d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc38d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fc962>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f803a>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f803a>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f803a>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f803a>] kmem_cache_alloc+0xba/0x290 mm/slub.c:2628
 [<ffffffff81557437>] fasync_alloc fs/fcntl.c:603 [inline]
 [<ffffffff81557437>] fasync_add_entry fs/fcntl.c:661 [inline]
 [<ffffffff81557437>] fasync_helper+0x37/0xb0 fs/fcntl.c:690
 [<ffffffff82de4051>] sock_fasync+0xd1/0x1f0 net/socket.c:1063
 [<ffffffff81558aa1>] ioctl_fioasync fs/ioctl.c:511 [inline]
 [<ffffffff81558aa1>] do_vfs_ioctl+0x981/0xee0 fs/ioctl.c:576
 [<ffffffff8155908f>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff8155908f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 3379:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc0c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc9e2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc9e2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f9127>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f9127>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f9127>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f9127>] kmem_cache_free+0xc7/0x320 mm/slub.c:2881
 [<ffffffff81554fdd>] fasync_free_rcu+0x1d/0x20 fs/fcntl.c:562
 [<ffffffff81294084>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff81294084>] rcu_do_batch kernel/rcu/tree.c:2705 [inline]
 [<ffffffff81294084>] invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
 [<ffffffff81294084>] __rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
 [<ffffffff81294084>] rcu_process_callbacks+0x7f4/0x14a0 kernel/rcu/tree.c:2957
 [<ffffffff83775057>] __do_softirq+0x227/0xa38 kernel/softirq.c:273

The buggy address belongs to the object at ffff8800ba18f300
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8800ba18f300, ffff8800ba18f360)
The buggy address belongs to the page:
BUG: unable to handle kernel paging request at fffffffcc8cab780
IP: [<ffffffff8122a525>] cpuacct_charge+0x155/0x390 kernel/sched/cpuacct.c:247
PGD 420f067 PUD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3388 Comm: syz-executor4 Not tainted 4.4.113-ge70c132 #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c51117c0 task.stack: ffff8800aba30000
RIP: 0010:[<ffffffff8122a525>]  [<ffffffff8122a525>] cpuacct_charge+0x155/0x390 kernel/sched/cpuacct.c:247
RSP: 0000:ffff8800aba37608  EFLAGS: 00010046
RAX: 1ffffffff0854fff RBX: 0000000000018528 RCX: ffffffff847eb500
RDX: fffffbff991956f0 RSI: fffffffcc8cab780 RDI: ffffffff842a7ff8
RBP: ffff8800aba37650 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff10015746e8c R12: ffffffff842a7f20
R13: dffffc0000000000 R14: 0000000013d8887f R15: ffffffffa8898050
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffcc8cab780 CR3: 000000000420c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8122a430 ffff8800aba37638 0000000000000046 0000000000000003
 ffff8800b402afe0 ffffffff83844340 0000000013d8887f ffff8800b402b030
 ffff8800b402af80 ffff8800aba376a0 ffffffff811dbea7 ffff8801db21f4c0
Call Trace:
 [<ffffffff811dbea7>] update_curr+0x2c7/0x6c0 kernel/sched/fair.c:882
 [<ffffffff811e4033>] enqueue_entity kernel/sched/fair.c:3511 [inline]
 [<ffffffff811e4033>] enqueue_task_fair+0x313/0x2940 kernel/sched/fair.c:4694
 [<ffffffff811bb7f8>] enqueue_task kernel/sched/core.c:856 [inline]
 [<ffffffff811bb7f8>] activate_task+0x148/0x270 kernel/sched/core.c:872
 [<ffffffff811bc79f>] ttwu_activate kernel/sched/core.c:1734 [inline]
 [<ffffffff811bc79f>] ttwu_do_activate.constprop.131+0xbf/0x1e0 kernel/sched/core.c:1787
 [<ffffffff811bfb8d>] ttwu_queue kernel/sched/core.c:1932 [inline]
 [<ffffffff811bfb8d>] try_to_wake_up+0x68d/0xf60 kernel/sched/core.c:2066
 [<ffffffff811c2710>] wake_up_state+0x10/0x20 kernel/sched/core.c:2146
 [<ffffffff81153c14>] signal_wake_up_state+0x44/0x70 kernel/signal.c:659
 [<ffffffff81154226>] signal_wake_up include/linux/sched.h:3307 [inline]
 [<ffffffff81154226>] complete_signal+0x5b6/0x700 kernel/signal.c:942
 [<ffffffff81155b6f>] __send_signal+0x90f/0x1330 kernel/signal.c:1080
 [<ffffffff811565da>] send_signal+0x4a/0xc0 kernel/signal.c:1096
 [<ffffffff81158d64>] do_send_sig_info+0xa4/0x130 kernel/signal.c:1151
 [<ffffffff81158e23>] send_sig_info+0x33/0x50 kernel/signal.c:1432
 [<ffffffff8133582e>] zap_pid_ns_processes+0x1de/0x690 kernel/pid_namespace.c:223
 [<ffffffff8113461f>] find_child_reaper kernel/exit.c:477 [inline]
 [<ffffffff8113461f>] forget_original_parent kernel/exit.c:563 [inline]
 [<ffffffff8113461f>] exit_notify kernel/exit.c:599 [inline]
 [<ffffffff8113461f>] do_exit+0x1ecf/0x2a10 kernel/exit.c:776
 [<ffffffff81139418>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff8115c872>] get_signal+0x4f2/0x1550 kernel/signal.c:2317
 [<ffffffff8100e7fb>] do_signal+0x8b/0x1d40 arch/x86/kernel/signal.c:712
 [<ffffffff810035fa>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:247
 [<ffffffff81006363>] prepare_exit_to_usermode+0xe3/0x100 arch/x86/entry/common.c:282
 [<ffffffff83772708>] retint_user+0x8/0x3c
Code: 49 8d bc 24 d8 00 00 00 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 9e 01 00 00 49 8b 9c 24 d8 00 00 00 80 3a 00 0f 85 0a 02 00 00 <4a> 03 1c f9 48 89 d8 48 c1 e8 03 42 80 3c 28 00 0f 85 cf 01 00 
RIP  [<ffffffff8122a525>] cpuacct_charge+0x155/0x390 kernel/sched/cpuacct.c:247
 RSP <ffff8800aba37608>
CR2: fffffffcc8cab780
---[ end trace 47f3d591d250c36d ]---