nfsd: fix potential race in nfs4_find_file

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The WARN_ON_ONCE check is not terribly useful. It also seems possible
for nfs4_find_file to race with the destruction of an fi_deleg_file
while trying to take a reference to it.

Now that it's safe to pass nfs_get_file a NULL pointer, remove the WARN
and NULL pointer check. Take the fi_lock when fetching fi_deleg_file.

Cc: NeilBrown <neilb@suse.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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Jeff Layton 2023-01-06 10:33:48 -05:00 • committed by Chuck Lever

parent 70f62231cd

commit bd6aaf781d

1 changed files with 9 additions and 6 deletions

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15

fs/nfsd/nfs4state.c

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