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From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: Maxim Patlasov <MPatlasov@parallels.com>,
	Robert Baldyga <r.baldyga@samsung.com>,
	Michal Nazarewicz <mina86@mina86.com>,
	Felipe Balbi <balbi@ti.com>,
	linux-aio@kvack.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH 03/12] gadget/function/f_fs.c: close leaks
Date: Mon, 23 Feb 2015 10:00:27 -0800	[thread overview]
Message-ID: <1424714436-19371-4-git-send-email-hch@lst.de> (raw)
In-Reply-To: <1424714436-19371-1-git-send-email-hch@lst.de>

From: Al Viro <viro@zeniv.linux.org.uk>

If ffs_epfile_io() fails in AIO case, we end up leaking io_data
(and iovec_copy in case of AIO read).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 drivers/usb/gadget/function/f_fs.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index af98b09..3ab34a2 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -970,6 +970,7 @@ static ssize_t ffs_epfile_aio_write(struct kiocb *kiocb,
 				    unsigned long nr_segs, loff_t loff)
 {
 	struct ffs_io_data *io_data;
+	ssize_t res;
 
 	ENTER();
 
@@ -989,7 +990,10 @@ static ssize_t ffs_epfile_aio_write(struct kiocb *kiocb,
 
 	kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
 
-	return ffs_epfile_io(kiocb->ki_filp, io_data);
+	res = ffs_epfile_io(kiocb->ki_filp, io_data);
+	if (res != -EIOCBQUEUED)
+		kfree(io_data);
+	return res;
 }
 
 static ssize_t ffs_epfile_aio_read(struct kiocb *kiocb,
@@ -998,6 +1002,7 @@ static ssize_t ffs_epfile_aio_read(struct kiocb *kiocb,
 {
 	struct ffs_io_data *io_data;
 	struct iovec *iovec_copy;
+	ssize_t res;
 
 	ENTER();
 
@@ -1025,7 +1030,12 @@ static ssize_t ffs_epfile_aio_read(struct kiocb *kiocb,
 
 	kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
 
-	return ffs_epfile_io(kiocb->ki_filp, io_data);
+	res = ffs_epfile_io(kiocb->ki_filp, io_data);
+	if (res != -EIOCBQUEUED) {
+		kfree(io_data);
+		kfree(iovec_copy);
+	}
+	return res;
 }
 
 static int
-- 
1.9.1


  parent reply	other threads:[~2015-02-23 18:02 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-23 18:00 [RFC] split struct kiocb Christoph Hellwig
2015-02-23 18:00 ` [PATCH 01/12] new helper: dup_iter() Christoph Hellwig
2015-02-23 18:00 ` [PATCH 02/12] move iov_iter.c from mm/ to lib/ Christoph Hellwig
2015-02-23 18:00 ` Christoph Hellwig [this message]
2015-02-23 18:00 ` [PATCH 04/12] gadget/function/f_fs.c: use put iov_iter into io_data Christoph Hellwig
2015-02-23 18:00 ` [PATCH 05/12] gadget/function/f_fs.c: switch to ->{read,write}_iter() Christoph Hellwig
2015-02-23 18:00 ` [PATCH 06/12] gadgetfs: use-after-free in ->aio_read() Christoph Hellwig
2015-03-08 10:07   ` Ming Lei
2015-03-09 15:18     ` Michal Nazarewicz
2015-02-23 18:00 ` [PATCH 07/12] gadget: switch ep_io_operations to ->read_iter/->write_iter Christoph Hellwig
2015-02-23 18:00 ` [PATCH 08/12] fs: remove ki_nbytes Christoph Hellwig
2015-02-23 18:00 ` [PATCH 09/12] fuse: handle synchronous iocbs internally Christoph Hellwig
2015-03-06  2:54   ` Maxim Patlasov
2015-02-23 18:00 ` [PATCH 10/12] fs: don't allow to complete sync iocbs through aio_complete Christoph Hellwig
2015-02-23 18:00 ` [PATCH 11/12] fs: split generic and aio kiocb Christoph Hellwig
2015-02-23 18:00 ` [PATCH 12/12] fs: move struct kiocb to fs.h Christoph Hellwig
2015-02-23 21:20 ` [RFC] split struct kiocb Al Viro
2015-02-23 21:22   ` Christoph Hellwig
2015-02-23 21:39     ` Al Viro
2015-02-24  3:47       ` Al Viro
2015-02-23 21:23   ` Felipe Balbi
2015-02-23 21:42     ` Al Viro
2015-02-23 21:50       ` Felipe Balbi
2015-02-25 17:13   ` Felipe Balbi

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