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authorDave Kleikamp <shaggy@linux.vnet.ibm.com>2009-08-31 11:07:12 -0400
committerSteve French <sfrench@us.ibm.com>2009-09-01 22:35:01 +0000
commit6ab409b53dcaf28f83d518a6702f904b7cee3f41 (patch)
tree050bfb690ac9df049343034681478a5bb174a823 /fs/cifs/dir.c
parent1b49c5566136455764a8d17ead25784f534c202d (diff)
downloadop-kernel-dev-6ab409b53dcaf28f83d518a6702f904b7cee3f41.zip
op-kernel-dev-6ab409b53dcaf28f83d518a6702f904b7cee3f41.tar.gz
cifs: Replace wrtPending with a real reference count
Currently, cifs_close() tries to wait until all I/O is complete and then frees the file private data. If I/O does not completely in a reasonable amount of time it frees the structure anyway, leaving a potential use- after-free situation. This patch changes the wrtPending counter to a complete reference count and lets the last user free the structure. Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Tested-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/dir.c')
-rw-r--r--fs/cifs/dir.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 4326ffd..a6424cf 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -153,7 +153,7 @@ cifs_fill_fileinfo(struct inode *newinode, __u16 fileHandle,
mutex_init(&pCifsFile->fh_mutex);
mutex_init(&pCifsFile->lock_mutex);
INIT_LIST_HEAD(&pCifsFile->llist);
- atomic_set(&pCifsFile->wrtPending, 0);
+ atomic_set(&pCifsFile->count, 1);
/* set the following in open now
pCifsFile->pfile = file; */
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