Re: [Samba] Random EINVAL when opening files with SMB3 POSIX extensions enabled

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On Fri, Nov 29, 2024 at 05:22:11PM +0100, Ralph Boehme via samba wrote:
On 11/28/24 9:46 PM, Andrew Gunnerson wrote:
Thanks for the replies!

On Thu, Nov 28, 2024, at 04:34, Rowland Penny via samba wrote:
I do not use the SMB3 Unix extensions, but perhaps you may not be
either, have you tried replacing 'server min protocol = SMB2' (which is
the default anyway) with 'server min protocol = SMB3' ?

I took a packet capture and do see the the client making POSIX extension
requests, like SMB2_FILE_POSIX_INFO.

On Thu, Nov 28, 2024, at 04:53, Ralph Boehme wrote:
can you grab a network trace when it happens?

Sure thing! I disabled SMB encryption first since it seemed to make the pcaps
useless.

1. pcap when running `cat <file>`, which fails with EINVAL:

    https://files.pub.chiller3.com/issues/samba/posix_extensions/2024-11-28/posix_enabled_broken.pcap

it's a client problem.

See packet 30: the client issues an POSIX SMB2-CREATE with a pathname starting with a "/" which is not allowed. If you check the working cases there the pathnames are relative and don't start with "/".

@Steve: do you have any idea what could be causing this in cifs.ko?

DFS mistake ?




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