random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available)
random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available)
random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available)
random: nonblocking pool is initialized
==================================================================
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:2120
Read of size 8 at addr ffff8800b18e1140 by task syzkaller127979/3667

CPU: 0 PID: 3667 Comm: syzkaller127979 Not tainted 4.4.120-gd63fdf6 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 c9c03fc36005545e ffff8800aee8fab0 ffffffff81d0408d
 ffffea0002c63840 ffff8800b18e1140 0000000000000000 ffff8800b18e1140
 ffff8800ae884438 ffff8800aee8fae8 ffffffff814fe143 ffff8800b18e1140
Call Trace:
 [<ffffffff81d0408d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0408d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fe143>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fe655>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fe655>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fe7b4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b8439>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b8439>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b89b5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825ba85b>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151cf33>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151edd3>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff81521719>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff81521719>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<ffffffff8377395f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8800b18e1100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8800b18e1100, ffff8800b18e1160)
The buggy address belongs to the page:
BUG: unable to handle kernel paging request at ffffebe000000028
IP: [<ffffffff81d64240>] __list_del_entry+0x30/0x1d0 lib/list_debug.c:49
PGD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7 Comm: rcu_preempt Not tainted 4.4.120-gd63fdf6 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9b11800 task.stack: ffff8801d9b28000
RIP: 0010:[<ffffffff81d64240>]  [<ffffffff81d64240>] __list_del_entry+0x30/0x1d0 lib/list_debug.c:49
RSP: 0018:ffff8801d9b2f918  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffebe000000020 RCX: ffffebe000000020
RDX: ffffebe000000020 RSI: ffff8801d9b120d0 RDI: ffffebe000000028
RBP: ffff8801d9b2f930 R08: 0000000000000001 R09: ffffffff850e58e0
R10: 0000000000000001 R11: 1ffff1003b365ef2 R12: ffff8800aee4e800
R13: 0000000080000000 R14: 000077ff80000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffebe000000028 CR3: 00000000b18fa000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffffebe000000020 ffff8800aee4e800 ffff8801d9b2f948
 ffffffff81d643ed 0000000000000000 ffff8801d9b2f978 ffffffff810e93f3
 ffff8800aee4e800 ffff8800aee4eb40 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff81d643ed>] list_del+0xd/0x70 lib/list_debug.c:77
 [<ffffffff810e93f3>] pgd_list_del arch/x86/mm/pgtable.c:98 [inline]
 [<ffffffff810e93f3>] pgd_dtor arch/x86/mm/pgtable.c:142 [inline]
 [<ffffffff810e93f3>] pgd_free+0x63/0x100 arch/x86/mm/pgtable.c:407
 [<ffffffff81122ee6>] mm_free_pgd kernel/fork.c:552 [inline]
 [<ffffffff81122ee6>] __mmdrop+0x66/0x260 kernel/fork.c:698
 [<ffffffff811a4383>] mmdrop include/linux/sched.h:2781 [inline]
 [<ffffffff811a4383>] finish_task_switch+0x213/0x4e0 kernel/sched/core.c:2681
 [<ffffffff83764458>] context_switch kernel/sched/core.c:2805 [inline]
 [<ffffffff83764458>] __schedule+0xac8/0x1ca0 kernel/sched/core.c:3324
 [<ffffffff8376582a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3353
 [<ffffffff83770af5>] schedule_timeout+0x355/0x970 kernel/time/timer.c:1538
 [<ffffffff81292b22>] rcu_gp_kthread+0xdf2/0x2200 kernel/rcu/tree.c:2121
 [<ffffffff81190788>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83773d85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
Code: 00 00 fc ff df 48 89 f9 55 48 83 c7 08 48 89 fa 48 89 e5 41 54 48 c1 ea 03 53 48 83 ec 08 80 3c 02 00 0f 85 87 01 00 00 48 89 ca <48> 8b 59 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 
RIP  [<ffffffff81d64240>] __list_del_entry+0x30/0x1d0 lib/list_debug.c:49
 RSP <ffff8801d9b2f918>
CR2: ffffebe000000028
---[ end trace 72985ec0ad78c62c ]---