==================================================================
BUG: KASAN: wild-memory-access on address ffe708746dbd3000
Read of size 4060 by task syz-executor4/31019
CPU: 1 PID: 31019 Comm: syz-executor4 Not tainted 4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c8a2f628 ffffffff81d93149 ffe708746dbd3000 0000000000000fdc
 0000000000000000 ffff8801da39ca20 ffe708746dbd3000 ffff8801c8a2f6b0
 ffffffff8153d08f 0000000000000000 0000000000000000 ffffffff826648db
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d08f>] kasan_report_error mm/kasan/report.c:284 [inline]
 [<ffffffff8153d08f>] kasan_report.part.1+0x40f/0x500 mm/kasan/report.c:309
 [<ffffffff8153d460>] kasan_report+0x20/0x30 mm/kasan/report.c:296
 [<ffffffff8153bda7>] check_memory_region_inline mm/kasan/kasan.c:308 [inline]
 [<ffffffff8153bda7>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315
 [<ffffffff8153be11>] kasan_check_read+0x11/0x20 mm/kasan/kasan.c:320
 [<ffffffff826648db>] __copy_to_user arch/x86/include/asm/uaccess_64.h:182 [inline]
 [<ffffffff826648db>] sg_read_oxfer drivers/scsi/sg.c:1978 [inline]
 [<ffffffff826648db>] sg_read+0x124b/0x1400 drivers/scsi/sg.c:520
 [<ffffffff8156b741>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156f510>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156f510>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156f7c4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8160e4ff>] kernel_readv fs/splice.c:363 [inline]
 [<ffffffff8160e4ff>] default_file_splice_read+0x43f/0x7a0 fs/splice.c:435
 [<ffffffff8160d5fa>] do_splice_to+0x10a/0x160 fs/splice.c:899
 [<ffffffff8161337f>] do_splice fs/splice.c:1192 [inline]
 [<ffffffff8161337f>] SYSC_splice fs/splice.c:1416 [inline]
 [<ffffffff8161337f>] SyS_splice+0xf5f/0x1520 fs/splice.c:1399
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
FAULT_FLAG_ALLOW_RETRY missing 30
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 30999 Comm: syz-executor6 Tainted: G    B           4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d54ff960 ffffffff81d93149 ffff8801d54ffc40 0000000000000000
 ffff8801a9c6b310 ffff8801d54ffb30 ffff8801a9c6b200 ffff8801d54ffb58
 ffffffff81660dc8 ffff8801d54ffab0 0000000000000292 00000001d928a067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad818>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff8116a374>] SyS_rt_sigqueueinfo+0x24/0x30 kernel/signal.c:2967
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 30986 Comm: syz-executor6 Tainted: G    B           4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d938f9a0 ffffffff81d93149 ffff8801d938fc80 0000000000000000
 ffff8801a9c6b310 ffff8801d938fb70 ffff8801a9c6b200 ffff8801d938fb98
 ffffffff81660dc8 ffff8801d938faf0 ffff8801d938fbb8 00000001d928a067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad818>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'.
CPU: 1 PID: 31009 Comm: syz-executor6 Tainted: G    B           4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8e67780 ffffffff81d93149 ffff8801d8e67a60 0000000000000000
 ffff8801a9c6b310 ffff8801d8e67950 ffff8801a9c6b200 ffff8801d8e67978
 ffffffff81660dc8 ffff8801d8e678d0 0000000000000000 00000001d928a067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad818>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff815b2228>] SYSC_select fs/select.c:652 [inline]
 [<ffffffff815b2228>] SyS_select+0x158/0x1e0 fs/select.c:634
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
binder: 31150:31151 ioctl c0106401 20caa000 returned -22
binder: 31150:31151 ioctl c0106401 20caa000 returned -22
FAULT_FLAG_ALLOW_RETRY missing 30
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 31161 Comm: syz-executor7 Tainted: G    B           4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cb29f9a0 ffffffff81d93149 ffff8801cb29fc80 0000000000000000
 ffff8801a9c6b010 ffff8801cb29fb70 ffff8801a9c6af00 ffff8801cb29fb98
 ffffffff81660dc8 ffff8801cb29faf0 0000000000000000 00000001da38d067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad818>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 31147 Comm: syz-executor7 Tainted: G    B           4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d05c79a0 ffffffff81d93149 ffff8801d05c7c80 0000000000000000
 ffff8801a9c6b010 ffff8801d05c7b70 ffff8801a9c6af00 ffff8801d05c7b98
 ffffffff81660dc8 ffff8801d05c7af0 ffff8801d05c7bb8 00000001da38d067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad818>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
IPVS: Creating netns size=2536 id=78
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=30 sclass=netlink_audit_socket pig=31201 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=30 sclass=netlink_audit_socket pig=31205 comm=syz-executor2
device lo entered promiscuous mode
CPU: 0 PID: 31166 Comm: syz-executor7 Tainted: G    B           4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cd7df8c0 ffffffff81d93149 ffff8801cd7dfba0 0000000000000000
 ffff8801a9c6b010 ffff8801cd7dfa90 ffff8801a9c6af00 ffff8801cd7dfab8
 ffffffff81660dc8 ffff8801cd7dfa10 0000000000000000 00000001da38d067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad818>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=51958 sclass=netlink_tcpdiag_socket pig=31231 comm=syz-executor5
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=51958 sclass=netlink_tcpdiag_socket pig=31231 comm=syz-executor5
pktgen: kernel_thread() failed for cpu 0
pktgen: Cannot create thread for cpu 0 (-4)
pktgen: kernel_thread() failed for cpu 1
pktgen: Cannot create thread for cpu 1 (-4)
pktgen: Initialization failed for all threads
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
devpts: called with bogus options
devpts: called with bogus options
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=31525 comm=syz-executor5
IPVS: Creating netns size=2536 id=79
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=31558 comm=syz-executor5
pktgen: kernel_thread() failed for cpu 0
pktgen: Cannot create thread for cpu 0 (-4)
pktgen: kernel_thread() failed for cpu 1
pktgen: Cannot create thread for cpu 1 (-4)
pktgen: Initialization failed for all threads
nla_parse: 16 callbacks suppressed
binder: 31642:31647 ioctl c0106418 2046bfe0 returned -22
netlink: 13 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 13 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'.
tmpfs: No value for mount option 'I'
netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'.
tmpfs: No value for mount option 'I'
netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'.
binder: 31799:31800 ioctl 4c07 0 returned -22
binder: 31799:31800 ioctl 4c07 0 returned -22
device syz2 left promiscuous mode
device syz2 entered promiscuous mode
device syz2 left promiscuous mode
IPVS: length: 24 != 8
device syz3 entered promiscuous mode
IPv6: ADDRCONF(NETDEV_CHANGE): syz3: link becomes ready
device syz3 left promiscuous mode
device syz3 entered promiscuous mode
IPv6: ADDRCONF(NETDEV_CHANGE): syz3: link becomes ready
device syz3 left promiscuous mode
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=32158 comm=syz-executor6
device lo entered promiscuous mode
IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
device lo left promiscuous mode
IPVS: Creating netns size=2536 id=80
device lo entered promiscuous mode
IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
device lo left promiscuous mode
IPVS: Creating netns size=2536 id=81
keychord: using input dev AT Translated Set 2 keyboard for fevent
keychord: invalid keycode count 0
keychord: Insufficient bytes present for keycount 18
keychord: using input dev AT Translated Set 2 keyboard for fevent
keychord: invalid keycode count 0
binder: 32592:32594 ioctl 5404 207dcfec returned -22
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65280 sclass=netlink_route_socket pig=32612 comm=syz-executor1
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=59037 sclass=netlink_route_socket pig=32646 comm=syz-executor0
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65280 sclass=netlink_route_socket pig=32612 comm=syz-executor1
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=59037 sclass=netlink_route_socket pig=32659 comm=syz-executor0
binder: 32592:32665 ioctl 5404 207dcfec returned -22
9pnet_virtio: no channels available for device ./file0
9pnet_virtio: no channels available for device ./file0
sg_write: data in/out 34319/34 bytes for SCSI command 0xfc-- guessing data in;
   program syz-executor7 not setting count and/or reply_len properly
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 307 Comm: syz-executor7 Tainted: G    B           4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801a9416000 task.stack: ffff8801d7810000
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] put_page_testzero include/linux/mm.h:445 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
RSP: 0018:ffff8801d78179b0  EFLAGS: 00010a07
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3307 sclass=netlink_route_socket pig=331 comm=syz-executor4
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc9000327a000
RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3307 sclass=netlink_route_socket pig=342 comm=syz-executor4
RBP: ffff8801d78179c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff1003af02f18 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801d1dea100 R15: dffffc0000000000
FS:  00007f0eb03b2700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b31b62db8 CR3: 00000001d92f1000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801a9416000 ffff8801d1dea258 ffff8801d7817a20 ffffffff82661ed1
 ffff8801d1dea270 ffffed003a3bd44b ffffed003a3bd44e ffff8801d1dea268
 dead4ead00000000 ffff8801d1dea240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82661ed1>] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff82662295>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff82662359>] sg_new_read.isra.21+0x39/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff82663f36>] sg_read+0x8a6/0x1400 drivers/scsi/sg.c:456
 [<ffffffff8156b741>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156f510>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156f510>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156f7c4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156f8e6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81572ca7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81572ca7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838ac645>] 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  [<ffffffff8144df71>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144df71>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144df71>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144df71>] put_page_testzero include/linux/mm.h:445 [inline]
RIP  [<ffffffff8144df71>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
 RSP <ffff8801d78179b0>
---[ end trace a2a73b9fc3ca1dcb ]---