nfs4: start callback_ident at idr 1

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commit c68a027c05 upstream.

If clp->cl_cb_ident is zero, then nfs_cb_idr_remove_locked() skips removing
it when the nfs_client is freed.  A decoding or server bug can then find
and try to put that first nfs_client which would lead to a crash.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: d687031265 ("nfs4client: convert to idr_alloc()")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Benjamin Coddington 2015-11-20 09:56:20 -05:00 • committed by Greg Kroah-Hartman

parent 03ecddec2c

commit 254cbeb139

1 changed files with 1 additions and 1 deletions

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fs/nfs/nfs4client.c

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