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ext4: fix memory leak in ext4_mb_init_backend on error path.
commit a8867f4 upstream. Fix a memory leak discovered by syzbot when a file system is corrupted with an illegally large s_log_groups_per_flex. Reported-by: syzbot+aa12d6106ea4ca1b6aae@syzkaller.appspotmail.com Signed-off-by: Phillip Potter <phil@philpotter.co.uk> Cc: stable@kernel.org Link: https://lore.kernel.org/r/20210412073837.1686-1-phil@philpotter.co.uk Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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