==================================================================
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 ffff8801cffa71c0 by task syz-executor4/9872

CPU: 1 PID: 9872 Comm: syz-executor4 Not tainted 4.4.114-gfe09418 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 859e103d12698b7e ffff8800bb93f9f0 ffffffff81d02e6d
 ffffea00073fe9c0 ffff8801cffa71c0 0000000000000000 ffff8801cffa71c0
 ffff8801cd3ba338 ffff8800bb93fa28 ffffffff814fd6f3 ffff8801cffa71c0
Call Trace:
 [<ffffffff81d02e6d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d02e6d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd6f3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fdc05>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fdc05>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fdd64>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b75a9>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b75a9>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b7b25>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825b99cb>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151cc01>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151ef5d>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff8151f0d8>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff81521409>] SYSC_readv fs/read_write.c:860 [inline]
 [<ffffffff81521409>] SyS_readv+0xd9/0x240 fs/read_write.c:852
 [<ffffffff8377341f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 7435:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc763>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fca2d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fca2d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fd002>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f86da>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f86da>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f86da>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f86da>] kmem_cache_alloc+0xba/0x290 mm/slub.c:2628
 [<ffffffff815577ba>] fasync_alloc+0x1a/0x20 fs/fcntl.c:607
 [<ffffffff816142db>] do_fcntl_add_lease fs/locks.c:1824 [inline]
 [<ffffffff816142db>] fcntl_setlease+0xcb/0x220 fs/locks.c:1853
 [<ffffffff81556547>] do_fcntl fs/fcntl.c:328 [inline]
 [<ffffffff81556547>] SYSC_fcntl fs/fcntl.c:375 [inline]
 [<ffffffff81556547>] SyS_fcntl+0x6e7/0xc40 fs/fcntl.c:360
 [<ffffffff8377341f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 7463:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc763>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd082>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd082>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f97c7>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f97c7>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f97c7>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f97c7>] kmem_cache_free+0xc7/0x320 mm/slub.c:2881
 [<ffffffff8155567d>] fasync_free_rcu+0x1d/0x20 fs/fcntl.c:566
 [<ffffffff812945e4>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812945e4>] rcu_do_batch kernel/rcu/tree.c:2705 [inline]
 [<ffffffff812945e4>] invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
 [<ffffffff812945e4>] __rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
 [<ffffffff812945e4>] rcu_process_callbacks+0x7f4/0x14a0 kernel/rcu/tree.c:2957
 [<ffffffff83776917>] __do_softirq+0x227/0xa38 kernel/softirq.c:273

The buggy address belongs to the object at ffff8801cffa7180
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801cffa7180, ffff8801cffa71e0)
The buggy address belongs to the page:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9875 at lib/debugobjects.c:263 debug_print_object+0x17d/0x220 lib/debugobjects.c:260()
ODEBUG: deactivate not available (active state 0) object type: hrtimer hint: tick_sched_timer+0x0/0x120 kernel/time/tick-sched.c:124