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NFS: Fix memory leaks 

[ Upstream commit 123c23c6a7 ]

In _nfs42_proc_copy(), 'res->commit_res.verf' is allocated through
kzalloc() if 'args->sync' is true. In the following code, if
'res->synchronous' is false, handle_async_copy() will be invoked. If an
error occurs during the invocation, the following code will not be executed
and the error will be returned . However, the allocated
'res->commit_res.verf' is not deallocated, leading to a memory leak. This
is also true if the invocation of process_copy_commit() returns an error.

To fix the above leaks, redirect the execution to the 'out' label if an
error is encountered.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Wenwen Wang 2020-02-03 03:47:53 +00:00 committed by Greg Kroah-Hartman
parent 0562d37d14
commit 6b851823ce
1 changed files with 2 additions and 2 deletions
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4
fs/nfs/nfs42proc.c
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@ -283,14 +283,14 @@ static ssize_t _nfs42_proc_copy(struct file *src,
status = handle_async_copy(res, server, src, dst,
&args->src_stateid);
if (status)
return status;
goto out;
}
if ((!res->synchronous || !args->sync) &&
res->write_res.verifier.committed != NFS_FILE_SYNC) {
status = process_copy_commit(dst, pos_dst, res);
if (status)
return status;
goto out;
}
truncate_pagecache_range(dst_inode, pos_dst,