==================================================================
BUG: KASAN: wild-memory-access on address ffe708746fd83000
Read of size 37 by task syz-executor4/10749
CPU: 1 PID: 10749 Comm: syz-executor4 Not tainted 4.9.54-g34e23de #62
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c8f0fae8 ffffffff81d93659 ffe708746fd83000 0000000000000025
 0000000000000000 ffff8801cd18c7e0 ffe708746fd83000 ffff8801c8f0fb70
 ffffffff8153d48f 0000000000000000 0000000000000001 ffffffff826651bb
Call Trace:
 [<ffffffff81d93659>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93659>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d48f>] kasan_report_error mm/kasan/report.c:284 [inline]
 [<ffffffff8153d48f>] kasan_report.part.1+0x40f/0x500 mm/kasan/report.c:309
 [<ffffffff8153d860>] kasan_report+0x20/0x30 mm/kasan/report.c:296
 [<ffffffff8153c1a7>] check_memory_region_inline mm/kasan/kasan.c:308 [inline]
 [<ffffffff8153c1a7>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315
 [<ffffffff8153c211>] kasan_check_read+0x11/0x20 mm/kasan/kasan.c:320
 [<ffffffff826651bb>] __copy_to_user arch/x86/include/asm/uaccess_64.h:182 [inline]
 [<ffffffff826651bb>] sg_read_oxfer drivers/scsi/sg.c:1978 [inline]
 [<ffffffff826651bb>] sg_read+0x124b/0x1400 drivers/scsi/sg.c:520
 [<ffffffff8156d753>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156ece7>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff815728c9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff815728c9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838af185>] entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'.
IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE
IPv6: NLM_F_CREATE should be set when creating new route
IPv6: NLM_F_CREATE should be set when creating new route
9pnet_virtio: no channels available for device ./file0
netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'.
IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE
9pnet_virtio: no channels available for device ./file0
ALSA: seq fatal error: cannot create timer (-19)
kasan: CONFIG_KASAN_INLINE enabled
ALSA: seq fatal error: cannot create timer (-19)
kasan: GPF could be caused by NULL-ptr deref or user memory access
device syz1 entered promiscuous mode
device syz1 left promiscuous mode
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 10847 Comm: syz-executor4 Tainted: G    B           4.9.54-g34e23de #62
device syz1 entered promiscuous mode
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801a8b6b000 task.stack: ffff8801a8b70000
RIP: 0010:[<ffffffff8144e371>]  [<ffffffff8144e371>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144e371>]  [<ffffffff8144e371>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144e371>]  [<ffffffff8144e371>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144e371>]  [<ffffffff8144e371>] put_page_testzero include/linux/mm.h:445 [inline]
RIP: 0010:[<ffffffff8144e371>]  [<ffffffff8144e371>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
RSP: 0018:ffff8801a8b77ab0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc900031dc000
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801a8b77ac0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff1003516ef38 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801a8870000 R15: dffffc0000000000
FS:  00007f8c7e51b700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe028eafe8 CR3: 00000001cff02000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801a8b6b000 ffff8801a8870158 ffff8801a8b77b20 ffffffff826627b1
 ffff8801a8870170 ffffed003510e02b ffffed003510e02e ffff8801a8870168
 dead4ead00000000 ffff8801a8870140 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff826627b1>] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff82662b75>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff82662c39>] sg_new_read.isra.21+0x39/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff82664816>] sg_read+0x8a6/0x1400 drivers/scsi/sg.c:456
 [<ffffffff8156d753>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156ece7>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff815728c9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff815728c9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838af185>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: ff 66 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d 
RIP  [<ffffffff8144e371>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144e371>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144e371>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144e371>] put_page_testzero include/linux/mm.h:445 [inline]
RIP  [<ffffffff8144e371>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
 RSP <ffff8801a8b77ab0>
---[ end trace 34bcb7145c969dfd ]---