==================================================================
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 ffff8800b3c57140 by task syz-executor5/9502

CPU: 0 PID: 9502 Comm: syz-executor5 Not tainted 4.4.119-g855ea74 #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 8f249dcad0f3e74e ffff8801c3027ab0 ffffffff81d0402d
 ffffea0002cf15c0 ffff8800b3c57140 0000000000000000 ffff8800b3c57140
 ffff8800ad0e2338 ffff8801c3027ae8 ffffffff814fe103 ffff8800b3c57140
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
 [<ffffffff8377365f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 6498:
 [<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
 [<ffffffff82985d6e>] evdev_fasync+0x4e/0x60 drivers/input/evdev.c:342
 [<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
 [<ffffffff8377365f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 3818:
 [<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
 [<ffffffff83776b57>] __do_softirq+0x227/0xa38 kernel/softirq.c:273

The buggy address belongs to the object at ffff8800b3c57100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8800b3c57100, ffff8800b3c57160)
The buggy address belongs to the page:
PANIC: double fault, error_code: 0x0
CPU: 0 PID: 9502 Comm: syz-executor5 Not tainted 4.4.119-g855ea74 #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800a9371800 task.stack: ffff8801c3020000
RIP: 0010:[<ffffffff814907f8>]  [<ffffffff814907f8>] dump_page_badflags+0x8/0x250 mm/debug.c:84
RSP: 0018:ffff880100000000  EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffffea0002cf15c0 RCX: ffffffff81490970
RDX: 0000000000000000 RSI: ffffffff838a9060 RDI: ffffea0002cf15c0
RBP: ffff880100000010 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: fffffbfff0ad7e1e R12: 0000000000000000
R13: ffffffff838a9060 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f00bc644700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8800fffffff8 CR3: 00000000b2ede000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:

Call Trace:
 <UNK> 
Code: 00 e9 83 fd ff ff e8 88 df 06 00 e9 50 fd ff ff e8 7e df 06 00 e9 1d fd ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 <41> 55 49 89 f5 41 54 49 89 d4 53 48 89 fb 48 83 ec 08 e8 01 05