Check bytenr alignment for extent item to filter invalid items early. Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com> --- cmds-check.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/cmds-check.c b/cmds-check.c index 2aa0a7b..c56b176 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -5422,6 +5422,11 @@ static int process_extent_item(struct btrfs_root *root, num_bytes = key.offset; } + if (!IS_ALIGNED(key.objectid, root->sectorsize)) { + error("ignoring invalid extent, bytenr %llu is not aligned to %u", + key.objectid, root->sectorsize); + return -EIO; + } if (item_size < sizeof(*ei)) { #ifdef BTRFS_COMPAT_EXTENT_TREE_V0 struct btrfs_extent_item_v0 *ei0; @@ -5448,6 +5453,16 @@ static int process_extent_item(struct btrfs_root *root, metadata = 1; else metadata = 0; + if (metadata && num_bytes != root->nodesize) { + error("ignore invalid metadata extent, length %llu does not equal to %u", + num_bytes, root->nodesize); + return -EIO; + } + if (!metadata && !IS_ALIGNED(num_bytes, root->sectorsize)) { + error("ignore invalid data extent, length %llu is not aligned to %u", + num_bytes, root->sectorsize); + return -EIO; + } memset(&tmpl, 0, sizeof(tmpl)); tmpl.start = key.objectid; -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html