F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
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: 1 PID: 9478 Comm: syz-executor0 Not tainted 4.19.0-rc7-next-20181012+ #93
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+0x2f94/0x5a40 mm/memory.c:3886
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a5 22 00 00 49 8b 9f 30 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 76 22 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de
RSP: 0018:ffff8801c4a77020 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801c4a77158
RBP: ffff8801c4a77350 R08: ffffed003894edf2 R09: ffffed003894edf1
R10: ffffed003894edf1 R11: 0000000000000003 R12: 000ffffffffff000
R13: 0000000000000000 R14: ffff8801c4a77108 R15: ffff8801c4a77328
FS:  00007f5080cd3700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020011fd2 CR3: 00000001c2862000 CR4: 00000000001406e0
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
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x1b4/0x450 lib/iov_iter.c:421
Code: fd 49 39 dc 76 17 eb 3c e8 19 ce ec fd 49 81 c4 00 10 00 00 4c 39 a5 28 ff ff ff 72 2e e8 04 ce ec fd 0f 1f 00 0f ae e8 31 db <41> 8a 04 24 0f 1f 00 31 ff 89 de 88 85 58 ff ff ff e8 f6 ce ec fd
RSP: 0018:ffff8801c4a77690 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000f72b000
RDX: 00000000000002aa RSI: ffffffff83919c4c RDI: 0000000000000005
RBP: ffff8801c4a77768 R08: ffff8801890b45c0 R09: ffffed003b5e5b4f
R10: ffffed003b5e5b4f R11: ffff8801daf2da7b R12: 0000000020011fd2
R13: 0000000000000030 R14: 0000000000000030 R15: ffff8801c4a77bc8
 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: 0033:0x457519
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:00007f5080cd2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457519
RDX: 0000000000000030 RSI: 0000000020011fd2 RDI: 0000000000000007
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5080cd36d4
R13: 00000000004c563b R14: 00000000004d8fb8 R15: 00000000ffffffff
Modules linked in:
---[ end trace f8dc3e26148f2c8c ]---
F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
RIP: 0010:do_fault mm/memory.c:3524 [inline]
RIP: 0010:handle_pte_fault mm/memory.c:3762 [inline]
RIP: 0010:__handle_mm_fault+0x2f94/0x5a40 mm/memory.c:3886
F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a5 22 00 00 49 8b 9f 30 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 76 22 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de
F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
RSP: 0018:ffff8801c4a77020 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801c4a77158
F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
RBP: ffff8801c4a77350 R08: ffffed003894edf2 R09: ffffed003894edf1
R10: ffffed003894edf1 R11: 0000000000000003 R12: 000ffffffffff000
R13: 0000000000000000 R14: ffff8801c4a77108 R15: ffff8801c4a77328
FS:  00007f5080cd3700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020011fd2 CR3: 00000001c2862000 CR4: 00000000001406e0