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Commit 8c7424cff6 "nfsd4: don't try to encode conflicting owner if low
on space" forgot to free conf->data in nfsd4_encode_lockt and before
sign conf->data to NULL in nfsd4_encode_lock_denied, causing a leak.
Worse, kfree() can be called on an uninitialized pointer in the case of
a succesful lock (or one that fails for a reason other than a conflict).
(Note that lock->lk_denied.ld_owner.data appears it should be zero here,
until you notice that it's one arm of a union the other arm of which is
written to in the succesful case by the
memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
sizeof(stateid_t));
in nfsd4_lock(). In the 32-bit case this overwrites ld_owner.data.)
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Fixes: 8c7424cff6 ""nfsd4: don't try to encode conflicting owner if low on space"
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
f98bac5a30