Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.12 072/116] nfsd: make sure to balance get/put_write_access | Date | Tue, 26 Nov 2013 16:57:25 -0800 |
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3.12-stable review patch. If anyone has any objections, please let me know.
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From: Christoph Hellwig <hch@infradead.org>
commit 987da4791052fa298b7cfcde4dea9f6f2bbc786b upstream.
Use a straight goto error label style in nfsd_setattr to make sure we always do the put_write_access call after we got it earlier.
Note that the we have been failing to do that in the case nfsd_break_lease() returns an error, a bug introduced into 2.6.38 with 6a76bebefe15d9a08864f824d7f8d5beaf37c997 "nfsd4: break lease on nfsd setattr".
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/nfsd/vfs.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-)
--- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -444,27 +444,28 @@ nfsd_setattr(struct svc_rqst *rqstp, str iap->ia_valid |= ATTR_CTIME; - err = nfserr_notsync; - if (!check_guard || guardtime == inode->i_ctime.tv_sec) { - host_err = nfsd_break_lease(inode); - if (host_err) - goto out_nfserr; - fh_lock(fhp); - - host_err = notify_change(dentry, iap); - err = nfserrno(host_err); - fh_unlock(fhp); + if (check_guard && guardtime != inode->i_ctime.tv_sec) { + err = nfserr_notsync; + goto out_put_write_access; } + + host_err = nfsd_break_lease(inode); + if (host_err) + goto out_put_write_access_nfserror; + + fh_lock(fhp); + host_err = notify_change(dentry, iap); + fh_unlock(fhp); + +out_put_write_access_nfserror: + err = nfserrno(host_err); +out_put_write_access: if (size_change) put_write_access(inode); if (!err) commit_metadata(fhp); out: return err; - -out_nfserr: - err = nfserrno(host_err); - goto out; } #if defined(CONFIG_NFSD_V2_ACL) || \
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