Fwd: [Bug 201869] New: CIFS: block on llistxattr for SMB1

Volker Lendecke Volker.Lendecke at SerNet.DE
Wed Dec 12 06:54:44 UTC 2018

On Tue, Dec 11, 2018 at 01:26:49PM -0800, Jeremy Allison via samba-technical wrote:
> On Mon, Dec 10, 2018 at 10:19:39AM +0800, 冯小丽 wrote:
> > Re-send the smb log again because send it to samba-technical@ failed.
> As Steve already confirmed, smbd is blocking inside
> a call into the client-mounted filesystem on cifsfs.
> Cifsfs shouldn't block on system calls. This is a
> cifsf client bug, not an smbd bug.

Is that cifsfs mounting from a NetApp? Like 10 years ago I found a bug
in NetApp server replying to listxattr with 39 bytes of complete
garbage. NetApp did not accept this as a defect because cifsfs is not
on their list of supported clients. I ended up with a customer
specific patch disabling listxattr completely. So if it's a NetApp,
don't mount with cifsfs, go directly to NetApp with your supported


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