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authorAdam McCoy <adam@forsedomani.com>2020-05-13 11:53:30 +0000
committerSteve French <stfrench@microsoft.com>2020-05-14 17:47:01 -0500
commita48137996063d22ffba77e077425f49873856ca5 (patch)
tree0ea55985df6a5836586ceaee78db68b026523f26 /fs
parent9bd21d4b1a767c3abebec203342f3820dcb84662 (diff)
downloadlinux-stericsson-a48137996063d22ffba77e077425f49873856ca5.tar.gz
cifs: fix leaked reference on requeued write
Failed async writes that are requeued may not clean up a refcount on the file, which can result in a leaked open. This scenario arises very reliably when using persistent handles and a reconnect occurs while writing. cifs_writev_requeue only releases the reference if the write fails (rc != 0). The server->ops->async_writev operation will take its own reference, so the initial reference can always be released. Signed-off-by: Adam McCoy <adam@forsedomani.com> Signed-off-by: Steve French <stfrench@microsoft.com> CC: Stable <stable@vger.kernel.org> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/cifssmb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 182b864b3075..5014a82391ff 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -2152,8 +2152,8 @@ cifs_writev_requeue(struct cifs_writedata *wdata)
}
}
+ kref_put(&wdata2->refcount, cifs_writedata_release);
if (rc) {
- kref_put(&wdata2->refcount, cifs_writedata_release);
if (is_retryable_error(rc))
continue;
i += nr_pages;