RBP: 00007f556e9f6090 R08: 000000000000000a R09: 0000000000000014
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f5570a16038 R14: 00007f5570a15fa0 R15: 00007ffcf18d92f8
 </TASK>
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 2cd47067 P4D 2cd47067 PUD 0 
Oops: Oops: 0010 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 11470 Comm: syz.0.1512 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000663f998 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88803b4b5730 RCX: ffffffff82c4f41a
RDX: ffff888038d7a4c0 RSI: ffffffff82c4f2ac RDI: ffff88803b4b5680
RBP: 000000000002001e R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88803b4b5718
R13: dffffc0000000000 R14: ffff88803b4b5680 R15: ffff88805cee0000
FS:  00007f556e9f66c0(0000) GS:ffff8880d643f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000004d29d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000007
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netfs_unbuffered_write+0xae5/0x2080 fs/netfs/direct_write.c:189
 netfs_unbuffered_write_iter_locked+0x801/0xab0 fs/netfs/direct_write.c:287
 netfs_unbuffered_write_iter+0x40c/0x710 fs/netfs/direct_write.c:377
 v9fs_file_write_iter+0xbf/0x100 fs/9p/vfs_file.c:409
 do_iter_readv_writev+0x6ee/0x920 fs/read_write.c:829
 vfs_writev+0x360/0xe10 fs/read_write.c:1059
 do_pwritev+0x1ac/0x270 fs/read_write.c:1155
 __do_sys_pwritev2 fs/read_write.c:1213 [inline]
 __se_sys_pwritev2 fs/read_write.c:1204 [inline]
 __x64_sys_pwritev2+0xef/0x160 fs/read_write.c:1204
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f557079c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f556e9f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f5570a15fa0 RCX: 00007f557079c799
RDX: 0000000000000001 RSI: 0000200000000980 RDI: 0000000000000003
RBP: 00007f556e9f6090 R08: 000000000000000a R09: 0000000000000014
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f5570a16038 R14: 00007f5570a15fa0 R15: 00007ffcf18d92f8
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000663f998 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88803b4b5730 RCX: ffffffff82c4f41a
RDX: ffff888038d7a4c0 RSI: ffffffff82c4f2ac RDI: ffff88803b4b5680
RBP: 000000000002001e R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88803b4b5718
R13: dffffc0000000000 R14: ffff88803b4b5680 R15: ffff88805cee0000
FS:  00007f556e9f66c0(0000) GS:ffff8880d643f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000004d29d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000007
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400