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dm-integrity: limit MAX_TAG_SIZE to 255

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[ Upstream commit 77b8e6fbf9848d651f5cb7508f18ad0971f3ffdb ]

MAX_TAG_SIZE was 0x1a8 and it may be truncated in the "bi->metadata_size
= ic->tag_size" assignment. We need to limit it to 255.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mikulas Patocka 2025-09-08 15:52:02 +02:00 committed by Greg Kroah-Hartman
parent 49bc40a559
commit 9eb265e5aa
1 changed files with 1 additions and 1 deletions
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drivers/md/dm-integrity.c
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@ -128,7 +128,7 @@ struct journal_sector {
commit_id_t commit_id;
};
#define MAX_TAG_SIZE (JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
#define MAX_TAG_SIZE 255
#define METADATA_PADDING_SECTORS 8