ext4: fix possible memory leak in ext4_remount()
'orig_data' is malloced in ext4_remount() and should be freed before leaving from the error handling cases, otherwise it will cause memory leak. Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu> Reviewed-by: NLukas Czerner <lczerner@redhat.com> Cc: stable@vger.kernel.org
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