diff options
| -rw-r--r-- | fs/erofs/zdata.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 1b6816dd235f..c7be447ac64d 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -521,7 +521,7 @@ err_out: static int z_erofs_collector_begin(struct z_erofs_decompress_frontend *fe) { struct erofs_map_blocks *map = &fe->map; - struct erofs_workgroup *grp; + struct erofs_workgroup *grp = NULL; int ret; DBG_BUGON(fe->pcl); @@ -530,33 +530,31 @@ static int z_erofs_collector_begin(struct z_erofs_decompress_frontend *fe) DBG_BUGON(fe->owned_head == Z_EROFS_PCLUSTER_NIL); DBG_BUGON(fe->owned_head == Z_EROFS_PCLUSTER_TAIL_CLOSED); - if (map->m_flags & EROFS_MAP_META) { - if ((map->m_pa & ~PAGE_MASK) + map->m_plen > PAGE_SIZE) { - DBG_BUGON(1); - return -EFSCORRUPTED; - } - goto tailpacking; + if (!(map->m_flags & EROFS_MAP_META)) { + grp = erofs_find_workgroup(fe->inode->i_sb, + map->m_pa >> PAGE_SHIFT); + } else if ((map->m_pa & ~PAGE_MASK) + map->m_plen > PAGE_SIZE) { + DBG_BUGON(1); + return -EFSCORRUPTED; } - grp = erofs_find_workgroup(fe->inode->i_sb, map->m_pa >> PAGE_SHIFT); if (grp) { fe->pcl = container_of(grp, struct z_erofs_pcluster, obj); + ret = -EEXIST; } else { -tailpacking: ret = z_erofs_register_pcluster(fe); - if (!ret) - goto out; - if (ret != -EEXIST) - return ret; } - ret = z_erofs_lookup_pcluster(fe); - if (ret) { - erofs_workgroup_put(&fe->pcl->obj); + if (ret == -EEXIST) { + ret = z_erofs_lookup_pcluster(fe); + if (ret) { + erofs_workgroup_put(&fe->pcl->obj); + return ret; + } + } else if (ret) { return ret; } -out: z_erofs_pagevec_ctor_init(&fe->vector, Z_EROFS_NR_INLINE_PAGEVECS, fe->pcl->pagevec, fe->pcl->vcnt); /* since file-backed online pages are traversed in reverse order */ |