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xfs: validate ag btree levels using the precomputed values 

Use the AG btree height limits that we precomputed into the xfs_mount to
validate the AG headers instead of using XFS_BTREE_MAXLEVELS.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2021-03-22 09:51:54 -07:00
parent f53acface7
commit 973975b72a
3 changed files with 7 additions and 7 deletions
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8
fs/xfs/libxfs/xfs_alloc.c
View File

@ -2906,13 +2906,13 @@ xfs_agf_verify(
if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) < 1 ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) < 1 ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > XFS_BTREE_MAXLEVELS ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) > XFS_BTREE_MAXLEVELS)
be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > mp->m_ag_maxlevels ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) > mp->m_ag_maxlevels)
return __this_address;
if (xfs_sb_version_hasrmapbt(&mp->m_sb) &&
(be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) < 1 ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) > XFS_BTREE_MAXLEVELS))
be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) > mp->m_rmap_maxlevels))
return __this_address;
if (xfs_sb_version_hasrmapbt(&mp->m_sb) &&
@ -2939,7 +2939,7 @@ xfs_agf_verify(
if (xfs_sb_version_hasreflink(&mp->m_sb) &&
(be32_to_cpu(agf->agf_refcount_level) < 1 ||
be32_to_cpu(agf->agf_refcount_level) > XFS_BTREE_MAXLEVELS))
be32_to_cpu(agf->agf_refcount_level) > mp->m_refc_maxlevels))
return __this_address;
return NULL;

4
fs/xfs/libxfs/xfs_ialloc.c
View File

@ -2535,12 +2535,12 @@ xfs_agi_verify(
return __this_address;
if (be32_to_cpu(agi->agi_level) < 1 ||
be32_to_cpu(agi->agi_level) > XFS_BTREE_MAXLEVELS)
be32_to_cpu(agi->agi_level) > M_IGEO(mp)->inobt_maxlevels)
return __this_address;
if (xfs_sb_version_hasfinobt(&mp->m_sb) &&
(be32_to_cpu(agi->agi_free_level) < 1 ||
be32_to_cpu(agi->agi_free_level) > XFS_BTREE_MAXLEVELS))
be32_to_cpu(agi->agi_free_level) > M_IGEO(mp)->inobt_maxlevels))
return __this_address;
/*

2
fs/xfs/libxfs/xfs_inode_fork.c
View File

@ -195,7 +195,7 @@ xfs_iformat_btree(
XFS_BMDR_SPACE_CALC(nrecs) >
XFS_DFORK_SIZE(dip, mp, whichfork) ||
ifp->if_nextents > ip->i_d.di_nblocks) ||
level == 0 || level > XFS_BTREE_MAXLEVELS) {
level == 0 || level > XFS_BM_MAXLEVELS(mp, whichfork)) {
xfs_warn(mp, "corrupt inode %Lu (btree).",
(unsigned long long) ip->i_ino);
xfs_inode_verifier_error(ip, -EFSCORRUPTED,