ext4: fix possible leak of sbi->s_group_desc_leak in error path
commit 9e463084cdb22e0b56b2dfbc50461020409a5fd3 upstream. Fixes: bfe0a5f4 ("ext4: add more mount time checks of the superblock") Reported-by: NVasily Averin <vvs@virtuozzo.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org # 4.18 Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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