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libfsimage/xfs: Amend mask32lo() to allow the value 32
agblklog could plausibly be 32, but that would overflow this shift. Perform the shift as ULL and cast to u32 at the end instead. This is part of XSA-443 / CVE-2023-34325 Signed-off-by: Alejandro Vallejo <alejandro.vallejo@cloud.com> Acked-by: Jan Beulich <jbeulich@suse.com>
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Alejandro Vallejo authored and Andrew Cooper committed
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@@ -61,7 +61,7 @@ static struct xfs_info xfs;
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#define inode ((xfs_dinode_t *)((char *)FSYS_BUF + 8192))
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#define icore (inode->di_core)
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#define mask32lo(n) (((xfs_uint32_t)1 << (n)) - 1)
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#define mask32lo(n) ((xfs_uint32_t)((1ull << (n)) - 1))
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#define XFS_INO_MASK(k) ((xfs_uint32_t)((1ULL << (k)) - 1))
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#define XFS_INO_OFFSET_BITS xfs.inopblog
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