9pnet: Insufficient options for proto=fd
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2040!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 21279 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:__block_commit_write.constprop.0.isra.0+0x287/0x310 fs/buffer.c:2040
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
Code: 41 5c 41 5d 41 5e 41 5f e9 46 f7 b1 ff e8 41 f7 b1 ff 48 8b 7c 24 10 48 c7 c6 c0 1a 75 88 e8 f0 88 d9 ff 0f 0b e8 29 f7 b1 ff <0f> 0b e8 22 f7 b1 ff 48 8b 7c 24 10 48 c7 c6 20 1f 75 88 e8 d1 88
RSP: 0018:ffff88809650f8e0 EFLAGS: 00010293
RAX: ffff8880a1110280 RBX: 0000000000000000 RCX: ffffffff81b08c58
RDX: 0000000000000000 RSI: ffffffff81b08e47 RDI: 0000000000000001
RBP: 0000000000000210 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000210
R13: 0000000000000010 R14: ffffea0001901080 R15: 0000000000000220
FS:  00007f76ad345700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff13dbc24f8 CR3: 0000000028287000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 block_write_end+0x53/0x140 fs/buffer.c:2163
 ext4_write_end+0x22b/0xec0 fs/ext4/inode.c:1432
 ext4_da_write_end+0x860/0xa70 fs/ext4/inode.c:3170
 generic_perform_write+0x2ae/0x4d0 mm/filemap.c:3181
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 ext4_file_write_iter+0x2fe/0xf20 fs/ext4/file.c:272
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f76ae9d0279
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f76ad345168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f76aeae2f80 RCX: 00007f76ae9d0279
RDX: 0000000000000010 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00007f76aea2a189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffd6ac0c5f R14: 00007f76ad345300 R15: 0000000000022000
Modules linked in:
---[ end trace cf428122abcb65f0 ]---
RIP: 0010:__block_commit_write.constprop.0.isra.0+0x287/0x310 fs/buffer.c:2040
Code: 41 5c 41 5d 41 5e 41 5f e9 46 f7 b1 ff e8 41 f7 b1 ff 48 8b 7c 24 10 48 c7 c6 c0 1a 75 88 e8 f0 88 d9 ff 0f 0b e8 29 f7 b1 ff <0f> 0b e8 22 f7 b1 ff 48 8b 7c 24 10 48 c7 c6 20 1f 75 88 e8 d1 88
RSP: 0018:ffff88809650f8e0 EFLAGS: 00010293
RAX: ffff8880a1110280 RBX: 0000000000000000 RCX: ffffffff81b08c58
RDX: 0000000000000000 RSI: ffffffff81b08e47 RDI: 0000000000000001
RBP: 0000000000000210 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000210
R13: 0000000000000010 R14: ffffea0001901080 R15: 0000000000000220
FS:  00007f76ad345700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21dfab1718 CR3: 0000000028287000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400