Re: NFS panic in latest main

On Thu, Jul 17, 2025 at 03:42:08PM +0200, Dag-Erling Smørgrav wrote:
> I have another one:
> 
>     db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe008dfd0490
>     assert_vop_locked() at assert_vop_locked+0x49/frame 0xfffffe008dfd04b0
>     VOP_PATHCONF_APV() at VOP_PATHCONF_APV+0x42/frame 0xfffffe008dfd04e0
>     nfsv4_fillattr() at nfsv4_fillattr+0xfa8/frame 0xfffffe008dfd0670
>     nfsvno_fillattr() at nfsvno_fillattr+0xdd/frame 0xfffffe008dfd0710
>     nfsrvd_getattr() at nfsrvd_getattr+0x3c6/frame 0xfffffe008dfd09a0
>     nfsrvd_dorpc() at nfsrvd_dorpc+0x167e/frame 0xfffffe008dfd0bb0
>     nfssvc_program() at nfssvc_program+0x852/frame 0xfffffe008dfd0db0
>     svc_run_internal() at svc_run_internal+0xaa8/frame 0xfffffe008dfd0ee0
>     svc_thread_start() at svc_thread_start+0xb/frame 0xfffffe008dfd0ef0
>     fork_exit() at fork_exit+0x82/frame 0xfffffe008dfd0f30
>     fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe008dfd0f30
>     --- trap 0xc, rip = 0x2a07bda3b4ea, rsp = 0x2a07bc818ed8, rbp = 0x2a07bc819170 ---
>     vnode 0xfffff8007dfdac08: type VDIR state VSTATE_CONSTRUCTED op 0xffffffff822fc120
>         usecount 3, writecount 0, refcount 1 seqc users 0 mountedhere 0
>         hold count flags ()
>         flags (VV_ROOT)
>         lock type tmpfs: UNLOCKED
>     tag VT_TMPFS, tmpfs_node 0xfffff800ada100f0, flags 0x0, links 2
>     	mode 0755, owner 0, group 0, size 0, status 0x0
>     
>     VOP_PATHCONF Entry (vp): 0xfffff8007dfdac08 is not locked but should be
> 
> This can be reliably triggered by running the nfsv4 test case from
> review D51371.  Note that you will need to apply D51372 first to allow
> the client jail to mount NFS file systems.

Try https://reviews.freebsd.org/D51398