RepoMirrors/btrfs-progs
1
0
Fork 0
mirror of https://github.com/kdave/btrfs-progs synced 2025-04-30 06:57:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

btrfs-progs: fsck: Check bytenr alignment for extent item

Browse Source 
Check bytenr alignment for extent item to filter invalid items early.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2016-08-30 15:22:15 +08:00 committed by David Sterba
parent f51a34696b
commit 77deae9cb7
1 changed files with 15 additions and 0 deletions

15
cmds-check.c
View File

@ -5422,6 +5422,11 @@ static int process_extent_item(struct btrfs_root *root,
num_bytes = key.offset; 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)) { if (item_size < sizeof(*ei)) {
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
struct btrfs_extent_item_v0 *ei0; struct btrfs_extent_item_v0 *ei0;
@ -5448,6 +5453,16 @@ static int process_extent_item(struct btrfs_root *root,
metadata = 1; metadata = 1;
else else
metadata = 0; 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)); memset(&tmpl, 0, sizeof(tmpl));
tmpl.start = key.objectid; tmpl.start = key.objectid;