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ext4: do not trim the group with corrupted block bitmap
Otherwise operating on an incorrupted block bitmap can lead to all sorts of unknown problems. Signed-off-by: Baokun Li <libaokun1@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20240104142040.2835097-3-libaokun1@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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@ -6761,6 +6761,9 @@ __releases(ext4_group_lock_ptr(sb, e4b->bd_group))
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bool set_trimmed = false;
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void *bitmap;
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if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info)))
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return 0;
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last = ext4_last_grp_cluster(sb, e4b->bd_group);
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bitmap = e4b->bd_bitmap;
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if (start == 0 && max >= last)
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