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| author | Christoph Hellwig <hch@infradead.org> | 2013-11-18 05:07:47 -0800 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-11-18 12:06:48 -0500 |
| commit | 987da4791052fa298b7cfcde4dea9f6f2bbc786b (patch) | |
| tree | 8a469919f3990db2f496db44cb6a3d36d32569c4 /fs | |
| parent | 818e5a22e907fbae75e9c1fd78233baec9fa64b6 (diff) | |
| download | linux-987da4791052fa298b7cfcde4dea9f6f2bbc786b.tar.gz linux-987da4791052fa298b7cfcde4dea9f6f2bbc786b.tar.bz2 linux-987da4791052fa298b7cfcde4dea9f6f2bbc786b.zip | |
nfsd: make sure to balance get/put_write_access
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>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/vfs.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index c3f57cf14a63..7eea63cada1d 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -444,27 +444,28 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap, 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, NULL); - 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, NULL); + 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) || \ |