Re: [PATCH 3/3] RDMA/rtrs-srv: Reject an empty pathname

[sashiko-bot@kernel.org]

> process_info_req() uses the pathname sent by the client as the name of
> the session device and rejects names containing '/' or '.', but it
> accepts an empty one.  dev_set_name() succeeds for it, and device_add()
> then fails in kobject_add_internal(), which warns about the empty name.
> 
> Reject an empty pathname together with the other invalid ones.
> 
> Build-tested with x86_64 and arm64 allmodconfig (W=1, sparse): no new
> warnings.  Run-tested under KVM with KASAN, lockdep and kmemleak, using
> a small user-space rtrs client that sends an empty pathname: the server
> now rejects it at the check above, nothing is reported, and an ordinary
> rnbd map, I/O and unmap afterwards still work.  Not tested on RDMA
> hardware.
> 
> Fixes: dea7bb3ad3e0 ("RDMA/rtrs: Do not allow sessname to contain special symbols / and .")
> Cc: stable@vger.kernel.org
> Assisted-by: Claude:claude-opus-5-5 kbound
> Signed-off-by: Yuqiang Sun <izaiahsun@gmail.com>

Sashiko has reviewed this patch and found no issues.

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