From 37ec35a6cc2b99eb7fd6b85b7d7b75dff46bc353 Mon Sep 17 00:00:00 2001 From: Gao Xiang Date: Tue, 18 Sep 2018 22:25:33 +0800 Subject: [PATCH] staging: erofs: fix a missing endian conversion This patch fixes a missing endian conversion in vle_get_logical_extent_head. Reviewed-by: Chao Yu Signed-off-by: Gao Xiang Signed-off-by: Greg Kroah-Hartman --- drivers/staging/erofs/unzip_vle.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/staging/erofs/unzip_vle.c b/drivers/staging/erofs/unzip_vle.c index 21874b79c434..d16e3dc84765 100644 --- a/drivers/staging/erofs/unzip_vle.c +++ b/drivers/staging/erofs/unzip_vle.c @@ -1488,6 +1488,7 @@ static erofs_off_t vle_get_logical_extent_head( struct super_block *const sb = inode->i_sb; const unsigned int clusterbits = EROFS_SB(sb)->clusterbits; const unsigned int clustersize = 1 << clusterbits; + unsigned int delta0; if (page->index != blkaddr) { kunmap_atomic(*kaddr_iter); @@ -1502,12 +1503,13 @@ static erofs_off_t vle_get_logical_extent_head( di = *kaddr_iter + vle_extent_blkoff(inode, lcn); switch (vle_cluster_type(di)) { case Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD: - BUG_ON(!di->di_u.delta[0]); - BUG_ON(lcn < di->di_u.delta[0]); + delta0 = le16_to_cpu(di->di_u.delta[0]); + DBG_BUGON(!delta0); + DBG_BUGON(lcn < delta0); ofs = vle_get_logical_extent_head(inode, page_iter, kaddr_iter, - lcn - di->di_u.delta[0], pcn, flags); + lcn - delta0, pcn, flags); break; case Z_EROFS_VLE_CLUSTER_TYPE_PLAIN: *flags ^= EROFS_MAP_ZIPPED; -- 2.11.0