NFS: avoid infinite loop in pnfs_update_layout.

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[ Upstream commit 2fdbc20036 ]

If pnfsd_update_layout() is called on a file for which recovery has
failed it will enter a tight infinite loop.

NFS_LAYOUT_INVALID_STID will be set, nfs4_select_rw_stateid() will
return -EIO, and nfs4_schedule_stateid_recovery() will do nothing, so
nfs4_client_recover_expired_lease() will not wait.  So the code will
loop indefinitely.

Break the loop by testing the validity of the open stateid at the top of
the loop.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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NeilBrown 2024-02-28 11:24:53 +11:00 • committed by Greg Kroah-Hartman

parent 4ff710fdf7

commit fbc63fb165

1 changed files with 8 additions and 0 deletions

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fs/nfs/pnfs.c

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