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check dfs_fd valid in close 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2539 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
goprife@gmail.com 2012-12-28 13:40:52 +00:00
parent 1c56553b04
commit 1c419d428e
1 changed files with 7 additions and 0 deletions
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7
components/dfs/src/dfs_posix.c
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@ -86,6 +86,13 @@ int close(int fd)
return -1; return -1;
} }
/* check dfs_fd valid or not */
if (d->path == RT_NULL || d->ref_count == 0)
{
rt_set_errno(-DFS_STATUS_EBADF);
return -1;
}
result = dfs_file_close(d); result = dfs_file_close(d);
fd_put(d); fd_put(d);