==================================================================
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 ffff8800b05753c0 by task syz-executor0/12350

CPU: 1 PID: 12350 Comm: syz-executor0 Not tainted 4.4.114-ga81d322 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 e138cbdedabb0ea6 ffff8801c52cf9f0 ffffffff81d0394d
 ffffea0002c15d40 ffff8800b05753c0 0000000000000000 ffff8800b05753c0
 ffff8801d2a00238 ffff8801c52cfa28 ffffffff814fe1d3 ffff8800b05753c0
Call Trace:
 [<ffffffff81d0394d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0394d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fe1d3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fe6e5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fe6e5>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fe844>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b8089>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b8089>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b8605>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825ba4ab>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151d6e1>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151fa3d>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff8151fbb8>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff81521ee9>] SYSC_readv fs/read_write.c:860 [inline]
 [<ffffffff81521ee9>] SyS_readv+0xd9/0x240 fs/read_write.c:852
 [<ffffffff83773edf>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 8089:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd243>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd50d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd50d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fdae2>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f91ba>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f91ba>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f91ba>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f91ba>] kmem_cache_alloc+0xba/0x290 mm/slub.c:2628
 [<ffffffff8155829a>] fasync_alloc+0x1a/0x20 fs/fcntl.c:607
 [<ffffffff81614dbb>] do_fcntl_add_lease fs/locks.c:1824 [inline]
 [<ffffffff81614dbb>] fcntl_setlease+0xcb/0x220 fs/locks.c:1853
 [<ffffffff81557027>] do_fcntl fs/fcntl.c:328 [inline]
 [<ffffffff81557027>] SYSC_fcntl fs/fcntl.c:375 [inline]
 [<ffffffff81557027>] SyS_fcntl+0x6e7/0xc40 fs/fcntl.c:360
 [<ffffffff83773edf>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 8089:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd243>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fdb62>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fdb62>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814fa2a7>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814fa2a7>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814fa2a7>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814fa2a7>] kmem_cache_free+0xc7/0x320 mm/slub.c:2881
 [<ffffffff815582bc>] fasync_free+0x1c/0x20 fs/fcntl.c:617
 [<ffffffff81614e58>] do_fcntl_add_lease fs/locks.c:1835 [inline]
 [<ffffffff81614e58>] fcntl_setlease+0x168/0x220 fs/locks.c:1853
 [<ffffffff81557027>] do_fcntl fs/fcntl.c:328 [inline]
 [<ffffffff81557027>] SYSC_fcntl fs/fcntl.c:375 [inline]
 [<ffffffff81557027>] SyS_fcntl+0x6e7/0xc40 fs/fcntl.c:360
 [<ffffffff83773edf>] entry_SYSCALL_64_fastpath+0x1c/0x98

The buggy address belongs to the object at ffff8800b0575380
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8800b0575380, ffff8800b05753e0)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access[   75.967666] ------------[ cut here ]------------
WARNING: CPU: 0 PID: 4019 at kernel/sched/core.c:7931 __might_sleep+0x138/0x1a0 kernel/sched/core.c:7926()
do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff81138a80>] do_wait+0x270/0xa20 kernel/exit.c:1503