random: sshd: uninitialized urandom read (32 bytes read, 123 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 ffff8801d1642140 by task syzkaller082664/3326

CPU: 1 PID: 3326 Comm: syzkaller082664 Not tainted 4.4.111-g7902639 #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 f809bfeee192b80c ffff8800b412fab0 ffffffff81d0509d
 ffffea0007459080 ffff8801d1642140 0000000000000000 ffff8801d1642140
 ffff8801d0130238 ffff8800b412fae8 ffffffff814fd433 ffff8801d1642140
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
 [<ffffffff8151c383>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151e223>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff81520b69>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff81520b69>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<ffffffff83775899>] entry_SYSCALL_64_fastpath+0x16/0x92

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d1642100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801d1642100, ffff8801d1642160)
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: 0 Comm: swapper/0 Not tainted 4.4.111-g7902639 #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84217840 task.stack: ffffffff84200000
RIP: 0010:[<ffffffff81d681f8>]  [<ffffffff81d681f8>] __debug_check_no_obj_freed lib/debugobjects.c:689 [inline]
RIP: 0010:[<ffffffff81d681f8>]  [<ffffffff81d681f8>] debug_check_no_obj_freed+0x1a8/0x9b0 lib/debugobjects.c:726
RSP: 0018:ffff8801db207a68  EFLAGS: 00010803
RAX: 0000000000000282 RBX: ffff8801d3470aa0 RCX: 0000000000000007
RDX: 1d2000dc1b1d0161 RSI: ffff8801db207af8 RDI: ffffffff8148f9a9
RBP: ffff8801db207b60 R08: 1ffffffff0291f35 R09: ffffffff850ffd90
R10: dead000000000200 R11: 1ffff1003b640f14 R12: ed04cee8ffffff45
R13: ffff8801d3470910 R14: e90006e0d8e80b0f R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055efc7ae80f0 CR3: 00000000b559c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff00000000 ffffffff842bca80 ffff8800b57c5c80 ffffffff84217840
 1ffff1003b640f5b ffffffff85791000 ffff8801d3471000 ffff8801d3470aa0
 ffffffff842180b0 ffff8801db207af8 00000000000325c0 fffffbfff0af2200
Call Trace:
 <IRQ> 
 [<ffffffff814f94ec>] slab_free_hook mm/slub.c:1376 [inline]
 [<ffffffff814f94ec>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f94ec>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f94ec>] kmem_cache_free+0xbc/0x320 mm/slub.c:2881
 [<ffffffff82fa90c6>] nf_conntrack_free+0xe6/0x130 net/netfilter/nf_conntrack_core.c:899
 [<ffffffff82faa758>] destroy_conntrack+0x268/0x380 net/netfilter/nf_conntrack_core.c:365
 [<ffffffff82f93daa>] nf_conntrack_destroy+0x9a/0x1a0 net/netfilter/core.c:389
 [<ffffffff82facb72>] nf_conntrack_put include/linux/skbuff.h:3364 [inline]
 [<ffffffff82facb72>] nf_ct_put include/net/netfilter/nf_conntrack.h:171 [inline]
 [<ffffffff82facb72>] nf_ct_delete+0x4d2/0x930 net/netfilter/nf_conntrack_core.c:417
 [<ffffffff82facfe9>] death_by_timeout+0x19/0x20 net/netfilter/nf_conntrack_core.c:424
 [<ffffffff8129fe6b>] call_timer_fn+0x18b/0x860 kernel/time/timer.c:1178
 [<ffffffff812a1f74>] __run_timers kernel/time/timer.c:1254 [inline]
 [<ffffffff812a1f74>] run_timer_softirq+0x604/0xbb0 kernel/time/timer.c:1437
 [<ffffffff83778dbd>] __do_softirq+0x24d/0xa59 kernel/softirq.c:273
 [<ffffffff8113da09>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff8113da09>] irq_exit+0x119/0x140 kernel/softirq.c:391
 [<ffffffff837784fb>] exiting_irq arch/x86/include/asm/apic.h:653 [inline]
 [<ffffffff837784fb>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff83777450>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:725
 <EOI> 
 [<ffffffff81027e15>] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline]
 [<ffffffff81027e15>] default_idle+0x55/0x3c0 arch/x86/kernel/process.c:291
 [<ffffffff8102938a>] arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:282
 [<ffffffff81220508>] default_idle_call+0x48/0x70 kernel/sched/idle.c:93
 [<ffffffff81220c15>] cpuidle_idle_call kernel/sched/idle.c:157 [inline]
 [<ffffffff81220c15>] cpu_idle_loop kernel/sched/idle.c:253 [inline]
 [<ffffffff81220c15>] cpu_startup_entry+0x605/0x820 kernel/sched/idle.c:301
 [<ffffffff837628b9>] rest_init+0x189/0x190 init/main.c:410
 [<ffffffff84820811>] start_kernel+0x6b9/0x6ee init/main.c:682
 [<ffffffff8481f312>] x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:196
 [<ffffffff8481f454>] x86_64_start_kernel+0x140/0x163 arch/x86/kernel/head64.c:185
Code: 48 c7 c6 40 ea 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  [<ffffffff81d681f8>] __debug_check_no_obj_freed lib/debugobjects.c:689 [inline]
RIP  [<ffffffff81d681f8>] debug_check_no_obj_freed+0x1a8/0x9b0 lib/debugobjects.c:726
 RSP <ffff8801db207a68>
---[ end trace d593b5dd8c24a4c5 ]---