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authorChristoph Hellwig <hch@infradead.org>2011-09-14 02:26:00 +0400
committerAlex Elder <aelder@sgi.com>2011-09-14 17:56:35 +0400
commit2d2422aebc037095f77551119f795449d29befed (patch)
tree1786857f965cb63887c2bd7fd8dd08aabaefab4a /fs
parent003f6c9df54970d8b19578d195b3e2b398cdbde2 (diff)
downloadlinux-2d2422aebc037095f77551119f795449d29befed.tar.xz
xfs: fix a use after free in xfs_end_io_direct_write
There is a window in which the ioend that we call inode_dio_wake on in xfs_end_io_direct_write is already free. Fix this by storing the inode pointer in a local variable. This is a fix for the regression introduced in 3.1-rc by "fs: move inode_dio_done to the end_io handler". Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/xfs_aops.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 63e971e2b837..8c37dde4c521 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1300,6 +1300,7 @@ xfs_end_io_direct_write(
bool is_async)
{
struct xfs_ioend *ioend = iocb->private;
+ struct inode *inode = ioend->io_inode;
/*
* blockdev_direct_IO can return an error even after the I/O
@@ -1331,7 +1332,7 @@ xfs_end_io_direct_write(
}
/* XXX: probably should move into the real I/O completion handler */
- inode_dio_done(ioend->io_inode);
+ inode_dio_done(inode);
}
STATIC ssize_t