NFSD: Unable to initialize client recovery tracking! (-22)
NFSD: starting 90-second grace period (net f000080f)
------------[ cut here ]------------
kernel BUG at net/sunrpc/svc.c:578!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6549 Comm: syz.8.511 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:svc_destroy+0x184/0x190 net/sunrpc/svc.c:578
Code: 5f 5d e9 2f be 64 f8 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 24 ff ff ff 4c 89 ff e8 36 46 7d f8 e9 17 ff ff ff e8 7c 19 2c f8 <0f> 0b e8 75 19 2c f8 0f 0b 0f 1f 00 55 41 57 41 56 41 55 41 54 53
RSP: 0018:ffffc90003b1fae8 EFLAGS: 00010287
RAX: ffffffff89561a74 RBX: ffff888078a79850 RCX: 0000000000080000
RDX: ffffc9000cd09000 RSI: 0000000000014621 RDI: 0000000000014622
RBP: 0000000000000001 R08: ffffffff90b0f3d7 R09: 1ffffffff2161e7a
R10: dffffc0000000000 R11: fffffbfff2161e7b R12: dffffc0000000000
R13: ffff88807d7b8000 R14: ffff888078a79868 R15: ffff888078a79800
FS:  00007f0d582746c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1228c6440 CR3: 0000000056eee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kref_put include/linux/kref.h:65 [inline]
 svc_put include/linux/sunrpc/svc.h:123 [inline]
 nfsd_svc+0x75e/0xab0 fs/nfsd/nfssvc.c:811
 write_threads+0x2ea/0x350 fs/nfsd/nfsctl.c:424
 nfsctl_transaction_write+0x105/0x150 fs/nfsd/nfsctl.c:114
 vfs_write+0x2dc/0x9a0 fs/read_write.c:582
 ksys_write+0x14d/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0d5739de99
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:00007f0d58274028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0d57625fa0 RCX: 00007f0d5739de99
RDX: 0000000000000002 RSI: 0000200000000240 RDI: 0000000000000003
RBP: 00007f0d57433eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0d57626038 R14: 00007f0d57625fa0 R15: 00007fffe2e79da8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:svc_destroy+0x184/0x190 net/sunrpc/svc.c:578
Code: 5f 5d e9 2f be 64 f8 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 24 ff ff ff 4c 89 ff e8 36 46 7d f8 e9 17 ff ff ff e8 7c 19 2c f8 <0f> 0b e8 75 19 2c f8 0f 0b 0f 1f 00 55 41 57 41 56 41 55 41 54 53
RSP: 0018:ffffc90003b1fae8 EFLAGS: 00010287
RAX: ffffffff89561a74 RBX: ffff888078a79850 RCX: 0000000000080000
RDX: ffffc9000cd09000 RSI: 0000000000014621 RDI: 0000000000014622
RBP: 0000000000000001 R08: ffffffff90b0f3d7 R09: 1ffffffff2161e7a
R10: dffffc0000000000 R11: fffffbfff2161e7b R12: dffffc0000000000
R13: ffff88807d7b8000 R14: ffff888078a79868 R15: ffff888078a79800
FS:  00007f0d582746c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563e67cf3000 CR3: 0000000056eee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400