random: sshd: uninitialized urandom read (32 bytes read, 105 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 ffff8801d1736140 by task syzkaller977839/3317

CPU: 1 PID: 3317 Comm: syzkaller977839 Not tainted 4.4.112-g5f6325b #21
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 55e8a44fe8834427 ffff8801d0ba7a40 ffffffff81d0579d
 ffffea000745cd80 ffff8801d1736140 0000000000000000 ffff8801d1736140
 ffff8801d4574438 ffff8801d0ba7a78 ffffffff814fd9f3 ffff8801d1736140
Call Trace:
 [<ffffffff81d0579d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0579d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd9f3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fdf05>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fdf05>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fe064>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825ba579>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825ba579>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2130
 [<ffffffff825baaf5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1848
 [<ffffffff825bc931>] sg_read+0xa21/0x1490 drivers/scsi/sg.c:538
 [<ffffffff8151c943>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151e7e3>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff81521129>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff81521129>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<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
 [<ffffffff83777e2a>] 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 ffff8801d1736100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801d1736100, ffff8801d1736160)
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: 489 Comm: khugepaged Not tainted 4.4.112-g5f6325b #21
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bacfc740 task.stack: ffff8800bb220000
RIP: 0010:[<ffffffff81d688f8>]  [<ffffffff81d688f8>] __debug_check_no_obj_freed lib/debugobjects.c:689 [inline]
RIP: 0010:[<ffffffff81d688f8>]  [<ffffffff81d688f8>] debug_check_no_obj_freed+0x1a8/0x9b0 lib/debugobjects.c:726
RSP: 0018:ffff8800bb2277d8  EFLAGS: 00010803
RAX: 0000000000000282 RBX: ffff8801cfd66000 RCX: 0000000000000002
RDX: 1d2000dc1b1d0161 RSI: ffff8800bb227868 RDI: ffffffff8148ff69
RBP: ffff8800bb2278d0 R08: 1ffffffff0291fed R09: ffffffff850f2140
R10: dead000000000200 R11: 1ffff10017644ec2 R12: ecff7ee8ffffff45
R13: ffff8801cfd65000 R14: e90006e0d8e80b0f R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f37ff7 CR3: 00000001d56e6000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 000000018122f1d1 ffffffff85184600 ffff8800bacfc740 0000000000000000
 1ffff10017644f09 ffffffff85849880 ffff8801cfd66000 ffff8801cfd66000
 ffff8800bb227860 ffffffff8123588f 00000000000e9e40 fffffbfff0b09310
Call Trace:
 [<ffffffff8142d4e9>] free_pages_prepare+0x4a9/0xb30 mm/page_alloc.c:1049
 [<ffffffff8143331f>] free_hot_cold_page+0x3f/0x3a0 mm/page_alloc.c:2112
 [<ffffffff8143370f>] free_hot_cold_page_list+0x8f/0x3b0 mm/page_alloc.c:2160
 [<ffffffff81449107>] release_pages+0x1f7/0x4f0 mm/swap.c:970
 [<ffffffff814495c5>] pagevec_lru_move_fn+0x1c5/0x250 mm/swap.c:443
 [<ffffffff814498b7>] __pagevec_lru_add mm/swap.c:1054 [inline]
 [<ffffffff814498b7>] __lru_cache_add+0x187/0x240 mm/swap.c:637
 [<ffffffff8144a104>] lru_cache_add+0x44/0x90 mm/swap.c:674
 [<ffffffff81457bd7>] putback_lru_page+0xa7/0x110 mm/vmscan.c:749
 [<ffffffff8150832f>] release_pte_page mm/huge_memory.c:2227 [inline]
 [<ffffffff8150832f>] __collapse_huge_page_copy mm/huge_memory.c:2354 [inline]
 [<ffffffff8150832f>] collapse_huge_page mm/huge_memory.c:2645 [inline]
 [<ffffffff8150832f>] khugepaged_scan_pmd mm/huge_memory.c:2754 [inline]
 [<ffffffff8150832f>] khugepaged_scan_mm_slot mm/huge_memory.c:2846 [inline]
 [<ffffffff8150832f>] khugepaged_do_scan mm/huge_memory.c:2926 [inline]
 [<ffffffff8150832f>] khugepaged+0x211f/0x2ac0 mm/huge_memory.c:2961
 [<ffffffff81190958>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff8377689f>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:494
Code: 48 c7 c6 40 fa 75 85 4c 8b 34 0e 4d 85 f6 0f 84 c5 03 00 00 49 ba 00 02 00 00 00 00 ad de 31 c9 48 8d 75 98 4c 89 f2 48 c1 ea 03 <42> 80 3c 3a 00 0f 85 f0 03 00 00 49 8d 7e 18 83 c1 01 49 8b 16 
RIP  [<ffffffff81d688f8>] __debug_check_no_obj_freed lib/debugobjects.c:689 [inline]
RIP  [<ffffffff81d688f8>] debug_check_no_obj_freed+0x1a8/0x9b0 lib/debugobjects.c:726
 RSP <ffff8800bb2277d8>
---[ end trace 45d61856b704bff8 ]---