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: 1 PID: 8596 Comm: syz-executor2 Not tainted 4.9.63-g44a3afc #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801ca0ae000 task.stack: ffff8801a7090000
RIP: 0010:[<ffffffff8144fce1>] [   58.007907] FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 8601 Comm: syz-executor7 Not tainted 4.9.63-g44a3afc #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c6bef930
 ffffffff81d94429 ffff8801c6befc10 0000000000000000 ffff8801d66d1910
 ffff8801c6befb00 ffff8801d66d1800 ffff8801c6befb28 ffffffff816623c7
 ffff8801c6befac8 ffff8801c6befa80 00000001d1cc9067Call Trace:
 [<ffffffff81d94429>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94429>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff816623c7>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814d16c1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814d16c1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814d16c1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814d16c1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e1447>] __do_page_fault+0x5b7/0xd70 arch/x86/mm/fault.c:1396
 [<ffffffff810e1c27>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ae8d8>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ad705>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 8598 Comm: syz-executor7 Not tainted 4.9.63-g44a3afc #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d0d77890
 ffffffff81d94429 ffff8801d0d77b70 0000000000000000 ffff8801d66d1910
 ffff8801d0d77a60 ffff8801d66d1800 ffff8801d0d77a88 ffffffff816623c7
 0000000000006e92 ffff8801d0d779e0 00000001d1cc9067Call Trace:
 [<ffffffff81d94429>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94429>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff816623c7>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814d16c1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814d16c1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814d16c1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814d16c1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e1447>] __do_page_fault+0x5b7/0xd70 arch/x86/mm/fault.c:1396
 [<ffffffff810e1c27>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ae8d8>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff815a46ce>] getname_flags+0x10e/0x580 fs/namei.c:148
 [<ffffffff815a4b59>] getname+0x19/0x20 fs/namei.c:208
 [<ffffffff8156b6fd>] do_sys_open+0x21d/0x4c0 fs/open.c:1066
 [<ffffffff8156ba10>] SYSC_openat fs/open.c:1099 [inline]
 [<ffffffff8156ba10>] SyS_openat+0x30/0x40 fs/open.c:1093
 [<ffffffff838ad705>] entry_SYSCALL_64_fastpath+0x23/0xc6
9pnet_virtio: no channels available for device ./file0
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 8601 Comm: syz-executor7 Not tainted 4.9.63-g44a3afc #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c6bef930
 ffffffff81d94429 ffff8801c6befc10 0000000000000000 ffff8801d66d1c10
 ffff8801c6befb00 ffff8801d66d1b00 ffff8801c6befb28 ffffffff816623c7
 ffff8801c6befac8 ffff8801c6befa80 00000001d1cc9067Call Trace:
 [<ffffffff81d94429>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94429>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff816623c7>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814d16c1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814d16c1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814d16c1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814d16c1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e1447>] __do_page_fault+0x5b7/0xd70 arch/x86/mm/fault.c:1396
 [<ffffffff810e1c27>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ae8d8>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ad705>] entry_SYSCALL_64_fastpath+0x23/0xc6
9pnet_virtio: no channels available for device ./file0
 [<ffffffff8144fce1>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff8144fce1>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
 [<ffffffff8144fce1>] page_ref_count include/linux/page_ref.h:66 [inline]
 [<ffffffff8144fce1>] put_page_testzero include/linux/mm.h:445 [inline]
 [<ffffffff8144fce1>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
RSP: 0018:ffff8801a70979b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc90003b1b000
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801a70979c0 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801ca0ae000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801cfc02100 R15: dffffc0000000000
FS:  00007f67f0232700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020fa1000 CR3: 00000001a6e54000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffff8801cfc02258 ffff8801a7097a20 ffffffff826635a1
 ffff8801cfc02270 ffffed0039f8044b ffffed0039f8044e ffff8801cfc02268
 dead4ead00000000 ffff8801cfc02240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff826635a1>] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff82663965>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff82663d46>] sg_new_read.isra.21+0x356/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff8266561d>] sg_read+0x8bd/0x1440 drivers/scsi/sg.c:456
 [<ffffffff8156cd71>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff81570be0>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff81570be0>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff81570e94>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff81570fb6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff815744a7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff815744a7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838ad705>] 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  [<ffffffff8144fce1>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144fce1>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144fce1>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144fce1>] put_page_testzero include/linux/mm.h:445 [inline]
RIP  [<ffffffff8144fce1>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
 RSP <ffff8801a70979b0>
---[ end trace 13c3af83e866a7ab ]---