diff options
Diffstat (limited to 'fs/jfs/jfs_dmap.c')
| -rw-r--r-- | fs/jfs/jfs_dmap.c | 51 |
1 files changed, 22 insertions, 29 deletions
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 0e1019382cf5..cdfa699cd7c8 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -178,45 +178,30 @@ int dbMount(struct inode *ipbmap) dbmp_le = (struct dbmap_disk *) mp->data; bmp->db_mapsize = le64_to_cpu(dbmp_le->dn_mapsize); bmp->db_nfree = le64_to_cpu(dbmp_le->dn_nfree); - bmp->db_l2nbperpage = le32_to_cpu(dbmp_le->dn_l2nbperpage); - if (bmp->db_l2nbperpage > L2PSIZE - L2MINBLOCKSIZE || - bmp->db_l2nbperpage < 0) { - err = -EINVAL; - goto err_release_metapage; - } - bmp->db_numag = le32_to_cpu(dbmp_le->dn_numag); - if (!bmp->db_numag || bmp->db_numag > MAXAG) { - err = -EINVAL; - goto err_release_metapage; - } - bmp->db_maxlevel = le32_to_cpu(dbmp_le->dn_maxlevel); bmp->db_maxag = le32_to_cpu(dbmp_le->dn_maxag); bmp->db_agpref = le32_to_cpu(dbmp_le->dn_agpref); - if (bmp->db_maxag >= MAXAG || bmp->db_maxag < 0 || - bmp->db_agpref >= MAXAG || bmp->db_agpref < 0) { - err = -EINVAL; - goto err_release_metapage; - } - bmp->db_aglevel = le32_to_cpu(dbmp_le->dn_aglevel); bmp->db_agheight = le32_to_cpu(dbmp_le->dn_agheight); bmp->db_agwidth = le32_to_cpu(dbmp_le->dn_agwidth); - if (!bmp->db_agwidth) { - err = -EINVAL; - goto err_release_metapage; - } bmp->db_agstart = le32_to_cpu(dbmp_le->dn_agstart); bmp->db_agl2size = le32_to_cpu(dbmp_le->dn_agl2size); - if (bmp->db_agl2size > L2MAXL2SIZE - L2MAXAG || - bmp->db_agl2size < 0) { - err = -EINVAL; - goto err_release_metapage; - } - if (((bmp->db_mapsize - 1) >> bmp->db_agl2size) > MAXAG) { + if ((bmp->db_l2nbperpage > L2PSIZE - L2MINBLOCKSIZE) || + (bmp->db_l2nbperpage < 0) || + !bmp->db_numag || (bmp->db_numag > MAXAG) || + (bmp->db_maxag >= MAXAG) || (bmp->db_maxag < 0) || + (bmp->db_agpref >= MAXAG) || (bmp->db_agpref < 0) || + (bmp->db_agheight < 0) || (bmp->db_agheight > (L2LPERCTL >> 1)) || + (bmp->db_agwidth < 1) || (bmp->db_agwidth > (LPERCTL / MAXAG)) || + (bmp->db_agwidth > (1 << (L2LPERCTL - (bmp->db_agheight << 1)))) || + (bmp->db_agstart < 0) || + (bmp->db_agstart > (CTLTREESIZE - 1 - bmp->db_agwidth * (MAXAG - 1))) || + (bmp->db_agl2size > L2MAXL2SIZE - L2MAXAG) || + (bmp->db_agl2size < 0) || + ((bmp->db_mapsize - 1) >> bmp->db_agl2size) > MAXAG) { err = -EINVAL; goto err_release_metapage; } @@ -1404,6 +1389,12 @@ dbAllocAG(struct bmap * bmp, int agno, s64 nblocks, int l2nb, s64 * results) (1 << (L2LPERCTL - (bmp->db_agheight << 1))) / bmp->db_agwidth; ti = bmp->db_agstart + bmp->db_agwidth * (agno & (agperlev - 1)); + if (ti < 0 || ti >= le32_to_cpu(dcp->nleafs)) { + jfs_error(bmp->db_ipbmap->i_sb, "Corrupt dmapctl page\n"); + release_metapage(mp); + return -EIO; + } + /* dmap control page trees fan-out by 4 and a single allocation * group may be described by 1 or 2 subtrees within the ag level * dmap control page, depending upon the ag size. examine the ag's @@ -1824,8 +1815,10 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results) return -EIO; dp = (struct dmap *) mp->data; - if (dp->tree.budmin < 0) + if (dp->tree.budmin < 0) { + release_metapage(mp); return -EIO; + } /* try to allocate the blocks. */ |