From: "J. Bruce Fields" Subject: [PATCH 039/100] lockd: fix a leak in nlmsvc_testlock asynchronous request handling Date: Fri, 25 Jan 2008 18:16:19 -0500 Message-ID: <1201303040-7779-39-git-send-email-bfields@citi.umich.edu> References: <20080125231521.GG25141@fieldses.org> <1201303040-7779-1-git-send-email-bfields@citi.umich.edu> <1201303040-7779-2-git-send-email-bfields@citi.umich.edu> <1201303040-7779-3-git-send-email-bfields@citi.umich.edu> <1201303040-7779-4-git-send-email-bfields@citi.umich.edu> <1201303040-7779-5-git-send-email-bfields@citi.umich.edu> <1201303040-7779-6-git-send-email-bfields@citi.umich.edu> <1201303040-7779-7-git-send-email-bfields@citi.umich.edu> <1201303040-7779-8-git-send-email-bfields@citi.umich.edu> <1201303040-7779-9-git-send-email-bfields@citi.umich.edu> <1201303040-7779-10-git-send-email-bfields@citi.umich.edu> <1201303040-7779-11-git-send-email-bfields@citi.umich.edu> <1201303040-7779-12-git-send-email-bfields@citi.umich.edu> <1201303040-7779-13-git-send-email-bfields@citi.umich.edu> <1201303040-7779-14-git-send-email-bfields@citi.umich.edu> <1201303040-7779-15-git-send-email-bfields@citi.umich.edu> <1201303040-7779-16-git-send-email-bfields@citi.umich.edu> <1201303040-7779-17-git-send-email-bfields@citi.umich.edu> <1201303040-7779-18-git-send-email-bfields@citi.umich.edu> <1201303040-7779-19-git-send-email-bfields@citi.umich.edu> <1201303040-7779-20-git-send-email-bfields@citi.umich.edu> <1201303040-7779-21-git-send-email-bfields@citi.umich.edu> <1201303040-7779-22-git-send-email-bfields@citi.umich.edu> <1201303040-7779-23-git-send-email-bfields@citi.umich.edu> <1201303040-7779-24-git-send-email-bfields@citi.umich.edu> <1201303040-7779-25-git-send-email-bfields@citi.umich.edu> <1201303040-7779-26-git-send-email-bfields@citi.umich.edu> <1201303040-7779-27-git-send-email-bfields@citi.umich.edu> <1201303040-7779-28-git-send-email-bfields@citi.umich.edu> <1201303040-7779-29-git-send-email-bfields@citi.umich.edu> <1201303040-7779-30-git-send-email-bfields@citi.umich.edu> <1201303040-7779-31-git-send-email-bfields@citi.umich.edu> <1201303040-7779-32-git-send-email-bfields@citi.umich.edu> <1201303040-7779-33-git-send-email-bfields@citi.umich.edu> <1201303040-7779-34-git-send-email-bfields@citi.umich.edu> <1201303040-7779-35-git-send-email-bfields@citi.umich.edu> <1201303040-7779-36-git-send-email-bfields@citi.umich.edu> <1201303040-7779-37-git-send-email-bfields@citi.umich.edu> <1201303040-7779-38-git-send-email-bfields@citi.umich.edu> Cc: Oleg Drokin , "J. Bruce Fields" To: linux-nfs@vger.kernel.org Return-path: Received: from mail.fieldses.org ([66.93.2.214]:47406 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932072AbYAYXRl (ORCPT ); Fri, 25 Jan 2008 18:17:41 -0500 In-Reply-To: <1201303040-7779-38-git-send-email-bfields@citi.umich.edu> Sender: linux-nfs-owner@vger.kernel.org List-ID: From: Oleg Drokin Without the patch, there is a leakage of nlmblock structure refcount that holds a reference nlmfile structure, that holds a reference to struct file, when async GETFL is used (-EINPROGRESS return from file_ops->lock()), and also in some error cases. Fix up a style nit while we're here. Signed-off-by: J. Bruce Fields --- fs/lockd/svclock.c | 18 +++++++++++------- 1 files changed, 11 insertions(+), 7 deletions(-) diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index d120ec3..84c4d5e 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -501,25 +501,29 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file, block, block->b_flags, block->b_fl); if (block->b_flags & B_TIMED_OUT) { nlmsvc_unlink_block(block); - return nlm_lck_denied; + ret = nlm_lck_denied; + goto out; } if (block->b_flags & B_GOT_CALLBACK) { if (block->b_fl != NULL && block->b_fl->fl_type != F_UNLCK) { lock->fl = *block->b_fl; goto conf_lock; - } - else { + } else { nlmsvc_unlink_block(block); - return nlm_granted; + ret = nlm_granted; + goto out; } } - return nlm_drop_reply; + ret = nlm_drop_reply; + goto out; } error = vfs_test_lock(file->f_file, &lock->fl); - if (error == -EINPROGRESS) - return nlmsvc_defer_lock_rqst(rqstp, block); + if (error == -EINPROGRESS) { + ret = nlmsvc_defer_lock_rqst(rqstp, block); + goto out; + } if (error) { ret = nlm_lck_denied_nolocks; goto out; -- 1.5.4.rc2.60.gb2e62