==================================================================
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 ffff8801d0969840 by task syz-executor0/10961

CPU: 0 PID: 10961 Comm: syz-executor0 Not tainted 4.4.119-g024f962 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 836cdce8e3049ca0 ffff8800a957fab0 ffffffff81d0402d
 ffffea0007425a40 ffff8801d0969840 0000000000000000 ffff8801d0969840
 ffff8801d86d0238 ffff8800a957fae8 ffffffff814fe103 ffff8801d0969840
Call Trace:
 [<ffffffff81d0402d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0402d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fe103>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fe615>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fe615>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fe774>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b83b9>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b83b9>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b8935>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825ba7db>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151cef3>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151ed93>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff815216d9>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff815216d9>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<ffffffff8377361f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 6584:
 [<ffffffff81035d96>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd173>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd43d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd43d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fda12>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f90ea>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f90ea>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f90ea>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f90ea>] kmem_cache_alloc+0xba/0x290 mm/slub.c:2628
 [<ffffffff815588b7>] fasync_alloc fs/fcntl.c:607 [inline]
 [<ffffffff815588b7>] fasync_add_entry fs/fcntl.c:665 [inline]
 [<ffffffff815588b7>] fasync_helper+0x37/0xb0 fs/fcntl.c:694
 [<ffffffff81f45b82>] __tty_fasync+0xd2/0x290 drivers/tty/tty_io.c:2216
 [<ffffffff81f45daf>] tty_fasync+0x6f/0xa0 drivers/tty/tty_io.c:2255
 [<ffffffff8155726f>] setfl fs/fcntl.c:69 [inline]
 [<ffffffff8155726f>] do_fcntl fs/fcntl.c:270 [inline]
 [<ffffffff8155726f>] SYSC_fcntl fs/fcntl.c:375 [inline]
 [<ffffffff8155726f>] SyS_fcntl+0x64f/0xc40 fs/fcntl.c:360
 [<ffffffff8377361f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 3:
 [<ffffffff81035d96>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd173>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fda92>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fda92>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814fa1d7>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814fa1d7>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814fa1d7>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814fa1d7>] kmem_cache_free+0xc7/0x320 mm/slub.c:2881
 [<ffffffff8155643d>] fasync_free_rcu+0x1d/0x20 fs/fcntl.c:566
 [<ffffffff812950d4>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812950d4>] rcu_do_batch kernel/rcu/tree.c:2705 [inline]
 [<ffffffff812950d4>] invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
 [<ffffffff812950d4>] __rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
 [<ffffffff812950d4>] rcu_process_callbacks+0x7f4/0x14a0 kernel/rcu/tree.c:2957
 [<ffffffff83776b17>] __do_softirq+0x227/0xa38 kernel/softirq.c:273

The buggy address belongs to the object at ffff8801d0969800
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801d0969800, ffff8801d0969860)
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
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3686 Comm: syz-executor3 Not tainted 4.4.119-g024f962 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d91cb000 task.stack: ffff8801ce198000
RIP: 0010:[<ffffffff811bfcbd>]  [<ffffffff811bfcbd>] try_to_wake_up+0x20d/0xf60 kernel/sched/core.c:2043
RSP: 0018:ffff8801ce19fa28  EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 000000000001f4c0 RCX: 0000000000000000
RDX: 0000000099e15780 RSI: ffffffff842bdb60 RDI: 00000004cf0abc00
RBP: ffff8801ce19faa8 R08: 0000000000000001 R09: ffffffff83859380
R10: 0000000000000001 R11: 1ffff10039c33f0c R12: ffff8800baaa0818
R13: ffff8800baaa0000 R14: 00000000a9518050 R15: ffff8800baaa0008
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffea0007425a40 CR3: 000000000420c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d91cb8d0 0000000000000077 ffff8801d91cb000 ffff8801d91cb000
 ffff8801d91cb8f8 0000000000000024 ffff8801a9518050 ffffffff00000001
 000000000001f4c0 00000000ce19fb30 0000000000000086 ffff8800baaa0000
Call Trace:
 [<ffffffff811c2cc0>] wake_up_state+0x10/0x20 kernel/sched/core.c:2146
 [<ffffffff81153bc4>] signal_wake_up_state+0x44/0x70 kernel/signal.c:659
 [<ffffffff811541d6>] signal_wake_up include/linux/sched.h:3319 [inline]
 [<ffffffff811541d6>] complete_signal+0x5b6/0x700 kernel/signal.c:942
 [<ffffffff81155b1f>] __send_signal+0x90f/0x1330 kernel/signal.c:1080
 [<ffffffff8115658a>] send_signal+0x4a/0xc0 kernel/signal.c:1096
 [<ffffffff81158d14>] do_send_sig_info+0xa4/0x130 kernel/signal.c:1151
 [<ffffffff81158dd3>] send_sig_info+0x33/0x50 kernel/signal.c:1432
 [<ffffffff8133691e>] zap_pid_ns_processes+0x1de/0x690 kernel/pid_namespace.c:223
 [<ffffffff811345d2>] find_child_reaper kernel/exit.c:477 [inline]
 [<ffffffff811345d2>] forget_original_parent kernel/exit.c:563 [inline]
 [<ffffffff811345d2>] exit_notify kernel/exit.c:599 [inline]
 [<ffffffff811345d2>] do_exit+0x1ed2/0x2a10 kernel/exit.c:776
 [<ffffffff811393c8>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff811395fd>] SYSC_exit_group kernel/exit.c:896 [inline]
 [<ffffffff811395fd>] SyS_exit_group+0x1d/0x20 kernel/exit.c:894
 [<ffffffff8377361f>] entry_SYSCALL_64_fastpath+0x1c/0x98
Code: 04 02 84 c0 74 08 3c 03 0f 8e 2f 08 00 00 48 b8 00 00 00 00 00 fc ff df 45 8b 76 10 4a 8d 3c f5 80 b9 7e 84 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 19 0d 00 00 4a 03 1c f5 80 b9 7e 84 48 89 df 
RIP  [<ffffffff811bfcbd>] try_to_wake_up+0x20d/0xf60 kernel/sched/core.c:2043
 RSP <ffff8801ce19fa28>
---[ end trace 690258074f6a49bc ]---