input:  as /devices/virtual/input/input20
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
CPU: 0 PID: 23413 Comm: syz-executor5 Not tainted 4.19.0-rc6-next-20181004+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_fault mm/memory.c:3524 [inline]
RIP: 0010:handle_pte_fault mm/memory.c:3762 [inline]
RIP: 0010:__handle_mm_fault+0x2d72/0x55c0 mm/memory.c:3886
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 20 00 00 49 8b 9c 24 b0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 57 20 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de
RSP: 0018:ffff880188fa70a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8160f791
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff880188fa71d8
RBP: ffff880188fa7350 R08: ffffed00379f6fda R09: ffffed00379f6fd9
R10: ffffed00379f6fd9 R11: ffff8801bcfb7ecb R12: ffff880188fa7328
R13: ffff8801bd5b1810 R14: ffff8801ce74f910 R15: 0000000000000067
FS:  00007f0d2d2ff700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002053433f CR3: 00000001d8353000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 handle_mm_fault+0x54f/0xc70 mm/memory.c:3923
 __do_page_fault+0x567/0xd10 arch/x86/mm/fault.c:1355
 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1430
kobject: 'loop3' (0000000086ad4c25): kobject_uevent_env
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:609 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x363/0x450 lib/iov_iter.c:421
Code: 00 31 ff 44 89 ee 88 55 98 e8 59 3e f0 fd 45 85 ed 74 c2 e9 7d fe ff ff e8 3a 3d f0 fd 0f 1f 00 0f ae e8 48 8b 85 28 ff ff ff <8a> 00 0f 1f 00 31 ff 89 de 88 85 58 ff ff ff e8 29 3e f0 fd 85 db
RSP: 0018:ffff880188fa7690 EFLAGS: 00010246
RAX: 000000002053433f RBX: 0000000000000000 RCX: ffffc9000beee000
RDX: 0000000000040000 RSI: ffffffff838d3dd6 RDI: 0000000000000007
RBP: ffff880188fa7768 R08: ffff880186f10040 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000001000 R15: ffff880188fa7bc8
kobject: 'loop3' (0000000086ad4c25): fill_kobj_path: path = '/devices/virtual/block/loop3'
 generic_perform_write+0x216/0x6a0 mm/filemap.c:3038
 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3173
 ext4_file_write_iter+0x390/0x1420 fs/ext4/file.c:266
 call_write_iter include/linux/fs.h:1844 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6b8/0x9f0 fs/read_write.c:487
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457579
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0d2d2fec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579
RDX: 00000000fffffd63 RSI: 0000000020001340 RDI: 0000000000000006
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0d2d2ff6d4
R13: 00000000004c55ab R14: 00000000004d8ee0 R15: 00000000ffffffff
Modules linked in:
---[ end trace e585352065e3032a ]---
RIP: 0010:do_fault mm/memory.c:3524 [inline]
RIP: 0010:handle_pte_fault mm/memory.c:3762 [inline]
RIP: 0010:__handle_mm_fault+0x2d72/0x55c0 mm/memory.c:3886
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 20 00 00 49 8b 9c 24 b0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 57 20 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de
RSP: 0018:ffff880188fa70a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8160f791
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff880188fa71d8
RBP: ffff880188fa7350 R08: ffffed00379f6fda R09: ffffed00379f6fd9
R10: ffffed00379f6fd9 R11: ffff8801bcfb7ecb R12: ffff880188fa7328
R13: ffff8801bd5b1810 R14: ffff8801ce74f910 R15: 0000000000000067
FS:  00007f0d2d2ff700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002053433f CR3: 00000001d8353000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400