random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available)
==================================================================
BUG: KASAN: slab-out-of-bounds in list_empty include/linux/list.h:189 [inline]
BUG: KASAN: slab-out-of-bounds in sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2130
Read of size 8 at addr ffff8801d91e9140 by task syzkaller773317/3322

CPU: 1 PID: 3322 Comm: syzkaller773317 Not tainted 4.4.111-g7902639 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 b847e9dd29e08e73 ffff8800b3c37970 ffffffff81d0509d
 ffffea0007647a40 ffff8801d91e9140 0000000000000000 ffff8801d91e9140
 ffff8801d069a338 ffff8800b3c379a8 ffffffff814fd433 ffff8801d91e9140
Call Trace:
 [<ffffffff81d0509d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0509d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd433>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd945>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd945>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fdaa4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b9d09>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b9d09>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2130
 [<ffffffff825ba285>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1848
 [<ffffffff825bc0c1>] sg_read+0xa21/0x1490 drivers/scsi/sg.c:538
 [<ffffffff8151cc51>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151f7ef>] compat_do_readv_writev+0x5df/0x6e0 fs/read_write.c:984
 [<ffffffff8151f9c9>] compat_readv+0xd9/0x140 fs/read_write.c:1013
 [<ffffffff81521d58>] C_SYSC_readv fs/read_write.c:1033 [inline]
 [<ffffffff81521d58>] compat_SyS_readv+0xd8/0x1b0 fs/read_write.c:1022
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff8377722a>] sysenter_flags_fixed+0xd/0x17

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d91e9100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801d91e9100, ffff8801d91e9160)
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: 0 PID: 1519 Comm: kworker/0:2 Not tainted 4.4.111-g7902639 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events vmstat_shepherd
task: ffff8801d4d997c0 task.stack: ffff8801d4df8000
RIP: 0010:[<ffffffff81d66b8e>]  [<ffffffff81d66b8e>] lookup_object lib/debugobjects.c:120 [inline]
RIP: 0010:[<ffffffff81d66b8e>]  [<ffffffff81d66b8e>] debug_object_activate+0x1de/0x500 lib/debugobjects.c:405
RSP: 0018:ffff8801d4dffa10  EFLAGS: 00010003
RAX: 1ffff10016786fe9 RBX: 00000000ffc3697c RCX: ffffffff8428ec00
RDX: 000000001ff86d32 RSI: 0000000000000008 RDI: 00000000ffc36994
RBP: ffff8801d4dffae0 R08: ffffffff85794088 R09: 0000000000000096
R10: 0000000000000001 R11: 1ffff1003a9bff08 R12: 1ffff1003a9bff46
R13: 0000000000065fb6 R14: ffff8801db31b720 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005646e59d1100 CR3: 00000000b78d8000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff842bcb20 ffffffff8428ec00 0000000000000096 ffffffff85794088
 0000000041b58ab3 ffffffff83fcc949 ffffffff81d669b0 ffff8801d4d9a030
 0000000000000000 0000000000000000 0000000000000005 ffff8801db31b720
Call Trace:
 [<ffffffff8117acb8>] debug_work_activate kernel/workqueue.c:499 [inline]
 [<ffffffff8117acb8>] __queue_work+0x48/0xea0 kernel/workqueue.c:1354
 [<ffffffff8117bdd7>] __queue_delayed_work+0x237/0x390 kernel/workqueue.c:1495
 [<ffffffff8117dbb9>] queue_delayed_work_on+0x59/0xb0 kernel/workqueue.c:1533
 [<ffffffff81471899>] vmstat_shepherd+0x1c9/0x230 mm/vmstat.c:1488
 [<ffffffff8117fe37>] process_one_work+0x7d7/0x16e0 kernel/workqueue.c:2064
 [<ffffffff81180e1f>] worker_thread+0xdf/0xfe0 kernel/workqueue.c:2196
 [<ffffffff811908e8>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83775c9f>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:494
Code: d8 48 c1 e8 03 42 80 3c 38 00 0f 85 80 02 00 00 48 8b 1b 48 85 db 0f 84 84 00 00 00 48 8d 7b 18 41 83 c5 01 48 89 fa 48 c1 ea 03 <42> 80 3c 3a 00 0f 85 32 02 00 00 4c 3b 73 18 75 c2 4c 8d 6b 10 
RIP  [<ffffffff81d66b8e>] lookup_object lib/debugobjects.c:120 [inline]
RIP  [<ffffffff81d66b8e>] debug_object_activate+0x1de/0x500 lib/debugobjects.c:405
 RSP <ffff8801d4dffa10>
---[ end trace fc920f4e74d2e9ee ]---