==================================================================
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 ffff8801c528a5c0 by task syz-executor3/12247

CPU: 0 PID: 12247 Comm: syz-executor3 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 a8ddf2478c784a2d ffff8800a9fbfab0 ffffffff81d028ed
 ffffea000714a280 ffff8801c528a5c0 0000000000000000 ffff8801c528a5c0
 ffff8801d8258238 ffff8800a9fbfae8 ffffffff814fd1c3 ffff8801c528a5c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd1c3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd6d5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd6d5>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fd834>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b6ed9>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b6ed9>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b7455>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825b92fb>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151be03>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151dca3>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff815205e9>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff815205e9>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 8690:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc233>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc4fd>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc4fd>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fcad2>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f81aa>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f81aa>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f81aa>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f81aa>] kmem_cache_alloc+0xba/0x290 mm/slub.c:2628
 [<ffffffff815575a7>] fasync_alloc fs/fcntl.c:603 [inline]
 [<ffffffff815575a7>] fasync_add_entry fs/fcntl.c:661 [inline]
 [<ffffffff815575a7>] fasync_helper+0x37/0xb0 fs/fcntl.c:690
 [<ffffffff82de41b1>] sock_fasync+0xd1/0x1f0 net/socket.c:1063
 [<ffffffff81558c11>] ioctl_fioasync fs/ioctl.c:511 [inline]
 [<ffffffff81558c11>] do_vfs_ioctl+0x981/0xee0 fs/ioctl.c:576
 [<ffffffff815591ff>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff815591ff>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 4102:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc233>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fcb52>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fcb52>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f9297>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f9297>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f9297>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f9297>] kmem_cache_free+0xc7/0x320 mm/slub.c:2881
 [<ffffffff8155514d>] fasync_free_rcu+0x1d/0x20 fs/fcntl.c:562
 [<ffffffff812941f4>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812941f4>] rcu_do_batch kernel/rcu/tree.c:2705 [inline]
 [<ffffffff812941f4>] invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
 [<ffffffff812941f4>] __rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
 [<ffffffff812941f4>] rcu_process_callbacks+0x7f4/0x14a0 kernel/rcu/tree.c:2957
 [<ffffffff83775197>] __do_softirq+0x227/0xa38 kernel/softirq.c:273

The buggy address belongs to the object at ffff8801c528a580
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801c528a580, ffff8801c528a5e0)
The buggy address belongs to the page:
BUG: unable to handle kernel paging request at fffffffcd45ab780
IP: [<ffffffff8122a695>] 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: 4033 Comm: syz-fuzzer Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800ba4d0000 task.stack: ffff8800b9560000
RIP: 0010:[<ffffffff8122a695>]  [<ffffffff8122a695>] cpuacct_charge+0x155/0x390 kernel/sched/cpuacct.c:247
RSP: 0018:ffff8800b95678c0  EFLAGS: 00010046
RAX: 1ffffffff0854fff RBX: 0000000000018528 RCX: ffffffff847eb500
RDX: fffffbff9a8b56f0 RSI: fffffffcd45ab780 RDI: ffffffff842a7ff8
RBP: ffff8800b9567908 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff100172acee4 R12: ffffffff842a7f20
R13: dffffc0000000000 R14: 000000003026f3e1 R15: ffffffffa9fb8050
FS:  000000c420026768(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffcd45ab780 CR3: 00000000acd4a000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8122a5a0 ffff8800b95678f0 0000000000000046 0000000000000003
 ffff8800b5eac7a0 ffffffff83844340 000000003026f3e1 ffff8800b5eac7f0
 ffff8800b5eac740 ffff8800b9567958 ffffffff811dcf57 ffff8801db21f4c0
Call Trace:
 [<ffffffff811dcf57>] update_curr+0x2c7/0x6c0 kernel/sched/fair.c:882
 [<ffffffff811e50e3>] enqueue_entity kernel/sched/fair.c:3511 [inline]
 [<ffffffff811e50e3>] 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
 [<ffffffff811c051e>] wake_up_q+0xbe/0x130 kernel/sched/core.c:581
 [<ffffffff812da00d>] futex_wake+0x3ad/0x450 kernel/futex.c:1364
 [<ffffffff812dffbe>] do_futex+0x78e/0x15d0 kernel/futex.c:3106
 [<ffffffff812e1008>] SYSC_futex kernel/futex.c:3162 [inline]
 [<ffffffff812e1008>] SyS_futex+0x208/0x2c0 kernel/futex.c:3130
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
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  [<ffffffff8122a695>] cpuacct_charge+0x155/0x390 kernel/sched/cpuacct.c:247
 RSP <ffff8800b95678c0>
CR2: fffffffcd45ab780
---[ end trace d25cd8b0b4f08f3f ]---