cifs: Do not leak EDEADLK to dgetents64 for STATUS_USER_SESSION_DELETED

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RHBZ: 1994393

If we hit a STATUS_USER_SESSION_DELETED for the Create part in the
Create/QueryDirectory compound that starts a directory scan
we will leak EDEADLK back to userspace and surprise glibc and the application.

Pick this up initiate_cifs_search() and retry a small number of tries before we
return an error to userspace.

Cc: stable@vger.kernel.org
Reported-by: Xiaoli Feng <xifeng@redhat.com>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

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Ronnie Sahlberg 2021-08-25 21:16:56 +10:00 • committed by Steve French

parent 332c404a55

commit 3998f0b8bc

1 changed files with 22 additions and 1 deletions

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fs/cifs/readdir.c

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