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jbd2: fix use after free in jbd2_journal_start_reserved() 

If start_this_handle() fails then it leads to a use after free of
"handle".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
This commit is contained in:
Dan Carpenter 2014-02-17 20:33:01 -05:00 committed by Theodore Ts'o
parent 19ea806037
commit 92e3b40537
1 changed files with 4 additions and 2 deletions
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6
fs/jbd2/transaction.c
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@ -514,11 +514,13 @@ int jbd2_journal_start_reserved(handle_t *handle, unsigned int type,
* similarly constrained call sites
*/
ret = start_this_handle(journal, handle, GFP_NOFS);
if (ret < 0)
if (ret < 0) {
jbd2_journal_free_reserved(handle);
return ret;
}
handle->h_type = type;
handle->h_line_no = line_no;
return ret;
return 0;
}
EXPORT_SYMBOL(jbd2_journal_start_reserved);