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-rw-r--r--fs/ceph/export.c18
-rw-r--r--fs/gfs2/export.c4
-rw-r--r--fs/isofs/export.c2
-rw-r--r--fs/reiserfs/inode.c6
-rw-r--r--fs/xfs/xfs_export.c3
-rw-r--r--mm/shmem.c6
6 files changed, 31 insertions, 8 deletions
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 8e1b60e557b6..02ce90972d81 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -99,7 +99,7 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
* FIXME: we should try harder by querying the mds for the ino.
*/
static struct dentry *__fh_to_dentry(struct super_block *sb,
- struct ceph_nfs_fh *fh)
+ struct ceph_nfs_fh *fh, int fh_len)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct inode *inode;
@@ -107,6 +107,9 @@ static struct dentry *__fh_to_dentry(struct super_block *sb,
struct ceph_vino vino;
int err;
+ if (fh_len < sizeof(*fh) / 4)
+ return ERR_PTR(-ESTALE);
+
dout("__fh_to_dentry %llx\n", fh->ino);
vino.ino = fh->ino;
vino.snap = CEPH_NOSNAP;
@@ -150,7 +153,7 @@ static struct dentry *__fh_to_dentry(struct super_block *sb,
* convert connectable fh to dentry
*/
static struct dentry *__cfh_to_dentry(struct super_block *sb,
- struct ceph_nfs_confh *cfh)
+ struct ceph_nfs_confh *cfh, int fh_len)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct inode *inode;
@@ -158,6 +161,9 @@ static struct dentry *__cfh_to_dentry(struct super_block *sb,
struct ceph_vino vino;
int err;
+ if (fh_len < sizeof(*cfh) / 4)
+ return ERR_PTR(-ESTALE);
+
dout("__cfh_to_dentry %llx (%llx/%x)\n",
cfh->ino, cfh->parent_ino, cfh->parent_name_hash);
@@ -207,9 +213,11 @@ static struct dentry *ceph_fh_to_dentry(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
if (fh_type == 1)
- return __fh_to_dentry(sb, (struct ceph_nfs_fh *)fid->raw);
+ return __fh_to_dentry(sb, (struct ceph_nfs_fh *)fid->raw,
+ fh_len);
else
- return __cfh_to_dentry(sb, (struct ceph_nfs_confh *)fid->raw);
+ return __cfh_to_dentry(sb, (struct ceph_nfs_confh *)fid->raw,
+ fh_len);
}
/*
@@ -230,6 +238,8 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb,
if (fh_type == 1)
return ERR_PTR(-ESTALE);
+ if (fh_len < sizeof(*cfh) / 4)
+ return ERR_PTR(-ESTALE);
pr_debug("fh_to_parent %llx/%d\n", cfh->parent_ino,
cfh->parent_name_hash);
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c
index e8ed6d4a6181..4767774a5f3e 100644
--- a/fs/gfs2/export.c
+++ b/fs/gfs2/export.c
@@ -161,6 +161,8 @@ static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid,
case GFS2_SMALL_FH_SIZE:
case GFS2_LARGE_FH_SIZE:
case GFS2_OLD_FH_SIZE:
+ if (fh_len < GFS2_SMALL_FH_SIZE)
+ return NULL;
this.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32;
this.no_formal_ino |= be32_to_cpu(fh[1]);
this.no_addr = ((u64)be32_to_cpu(fh[2])) << 32;
@@ -180,6 +182,8 @@ static struct dentry *gfs2_fh_to_parent(struct super_block *sb, struct fid *fid,
switch (fh_type) {
case GFS2_LARGE_FH_SIZE:
case GFS2_OLD_FH_SIZE:
+ if (fh_len < GFS2_LARGE_FH_SIZE)
+ return NULL;
parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
parent.no_formal_ino |= be32_to_cpu(fh[5]);
parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32;
diff --git a/fs/isofs/export.c b/fs/isofs/export.c
index 1d3804492aa7..2b4f2358eadb 100644
--- a/fs/isofs/export.c
+++ b/fs/isofs/export.c
@@ -175,7 +175,7 @@ static struct dentry *isofs_fh_to_parent(struct super_block *sb,
{
struct isofs_fid *ifid = (struct isofs_fid *)fid;
- if (fh_type != 2)
+ if (fh_len < 2 || fh_type != 2)
return NULL;
return isofs_export_iget(sb,
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 46485557cdc6..f27f01a98aa2 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1573,8 +1573,10 @@ struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
reiserfs_warning(sb, "reiserfs-13077",
"nfsd/reiserfs, fhtype=%d, len=%d - odd",
fh_type, fh_len);
- fh_type = 5;
+ fh_type = fh_len;
}
+ if (fh_len < 2)
+ return NULL;
return reiserfs_get_dentry(sb, fid->raw[0], fid->raw[1],
(fh_type == 3 || fh_type >= 5) ? fid->raw[2] : 0);
@@ -1583,6 +1585,8 @@ struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
+ if (fh_type > fh_len)
+ fh_type = fh_len;
if (fh_type < 4)
return NULL;
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 42679223a0fd..8c6d1d70278c 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -189,6 +189,9 @@ xfs_fs_fh_to_parent(struct super_block *sb, struct fid *fid,
struct xfs_fid64 *fid64 = (struct xfs_fid64 *)fid;
struct inode *inode = NULL;
+ if (fh_len < xfs_fileid_length(fileid_type))
+ return NULL;
+
switch (fileid_type) {
case FILEID_INO32_GEN_PARENT:
inode = xfs_nfs_get_inode(sb, fid->i32.parent_ino,
diff --git a/mm/shmem.c b/mm/shmem.c
index cc12072f8787..67afba5117f2 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2220,12 +2220,14 @@ static struct dentry *shmem_fh_to_dentry(struct super_block *sb,
{
struct inode *inode;
struct dentry *dentry = NULL;
- u64 inum = fid->raw[2];
- inum = (inum << 32) | fid->raw[1];
+ u64 inum;
if (fh_len < 3)
return NULL;
+ inum = fid->raw[2];
+ inum = (inum << 32) | fid->raw[1];
+
inode = ilookup5(sb, (unsigned long)(inum + fid->raw[0]),
shmem_match, fid->raw);
if (inode) {