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authorKevin Hilman <khilman@linaro.org>2015-05-06 13:57:01 -0700
committerKevin Hilman <khilman@linaro.org>2015-05-06 13:57:01 -0700
commit271de175c9af5be4ccc7a0e5701c76d3ccb92677 (patch)
tree08624b85629a42d9abca515389df397602154071 /fs
parent1dcd9896384ec3fe5c75829701d9babec7fe0d25 (diff)
parent99e64c4a808c55cb173b69dc21d28a4420eb22c5 (diff)
downloadlinux-linaro-stable-271de175c9af5be4ccc7a0e5701c76d3ccb92677.tar.gz
Merge branch 'linux-3.14.y' of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable into linux-linaro-lsk-v3.14
Diffstat (limited to 'fs')
-rw-r--r--fs/affs/amigaffs.c2
-rw-r--r--fs/autofs4/expire.c12
-rw-r--r--fs/autofs4/root.c2
-rw-r--r--fs/binfmt_elf.c9
-rw-r--r--fs/btrfs/extent-tree.c5
-rw-r--r--fs/btrfs/ioctl.c8
-rw-r--r--fs/btrfs/xattr.c53
-rw-r--r--fs/ceph/dir.c8
-rw-r--r--fs/ceph/inode.c2
-rw-r--r--fs/cifs/inode.c2
-rw-r--r--fs/coda/cache.c2
-rw-r--r--fs/dcache.c58
-rw-r--r--fs/debugfs/inode.c2
-rw-r--r--fs/exec.c76
-rw-r--r--fs/exportfs/expfs.c2
-rw-r--r--fs/ext4/namei.c20
-rw-r--r--fs/libfs.c12
-rw-r--r--fs/namei.c6
-rw-r--r--fs/ncpfs/dir.c2
-rw-r--r--fs/ncpfs/ncplib_kernel.h4
-rw-r--r--fs/nfs/getroot.c2
-rw-r--r--fs/notify/fsnotify.c4
-rw-r--r--fs/ocfs2/dcache.c2
-rw-r--r--fs/open.c2
-rw-r--r--fs/proc/task_mmu.c67
25 files changed, 225 insertions, 139 deletions
diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index d9a43674cb94..9cca0ea4e479 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -126,7 +126,7 @@ affs_fix_dcache(struct inode *inode, u32 entry_ino)
{
struct dentry *dentry;
spin_lock(&inode->i_lock);
- hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
if (entry_ino == (u32)(long)dentry->d_fsdata) {
dentry->d_fsdata = (void *)inode->i_ino;
break;
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 394e90b02c5e..edb46e67d5ca 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -91,7 +91,7 @@ static struct dentry *get_next_positive_subdir(struct dentry *prev,
spin_lock(&root->d_lock);
if (prev)
- next = prev->d_u.d_child.next;
+ next = prev->d_child.next;
else {
prev = dget_dlock(root);
next = prev->d_subdirs.next;
@@ -105,13 +105,13 @@ cont:
return NULL;
}
- q = list_entry(next, struct dentry, d_u.d_child);
+ q = list_entry(next, struct dentry, d_child);
spin_lock_nested(&q->d_lock, DENTRY_D_LOCK_NESTED);
/* Already gone or negative dentry (under construction) - try next */
if (!d_count(q) || !simple_positive(q)) {
spin_unlock(&q->d_lock);
- next = q->d_u.d_child.next;
+ next = q->d_child.next;
goto cont;
}
dget_dlock(q);
@@ -161,13 +161,13 @@ again:
goto relock;
}
spin_unlock(&p->d_lock);
- next = p->d_u.d_child.next;
+ next = p->d_child.next;
p = parent;
if (next != &parent->d_subdirs)
break;
}
}
- ret = list_entry(next, struct dentry, d_u.d_child);
+ ret = list_entry(next, struct dentry, d_child);
spin_lock_nested(&ret->d_lock, DENTRY_D_LOCK_NESTED);
/* Negative dentry - try next */
@@ -461,7 +461,7 @@ found:
spin_lock(&sbi->lookup_lock);
spin_lock(&expired->d_parent->d_lock);
spin_lock_nested(&expired->d_lock, DENTRY_D_LOCK_NESTED);
- list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child);
+ list_move(&expired->d_parent->d_subdirs, &expired->d_child);
spin_unlock(&expired->d_lock);
spin_unlock(&expired->d_parent->d_lock);
spin_unlock(&sbi->lookup_lock);
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index cc87c1abac97..9e016e6fb582 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -655,7 +655,7 @@ static void autofs_clear_leaf_automount_flags(struct dentry *dentry)
/* only consider parents below dentrys in the root */
if (IS_ROOT(parent->d_parent))
return;
- d_child = &dentry->d_u.d_child;
+ d_child = &dentry->d_child;
/* Set parent managed if it's becoming empty */
if (d_child->next == &parent->d_subdirs &&
d_child->prev == &parent->d_subdirs)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index f4d7b2fc9ffb..78f46089a077 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -751,6 +751,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
i < loc->elf_ex.e_phnum; i++, elf_ppnt++) {
int elf_prot = 0, elf_flags;
unsigned long k, vaddr;
+ unsigned long total_size = 0;
if (elf_ppnt->p_type != PT_LOAD)
continue;
@@ -815,10 +816,16 @@ static int load_elf_binary(struct linux_binprm *bprm)
#else
load_bias = ELF_PAGESTART(ELF_ET_DYN_BASE - vaddr);
#endif
+ total_size = total_mapping_size(elf_phdata,
+ loc->elf_ex.e_phnum);
+ if (!total_size) {
+ error = -EINVAL;
+ goto out_free_dentry;
+ }
}
error = elf_map(bprm->file, load_bias + vaddr, elf_ppnt,
- elf_prot, elf_flags, 0);
+ elf_prot, elf_flags, total_size);
if (BAD_ADDR(error)) {
send_sig(SIGKILL, current, 0);
retval = IS_ERR((void *)error) ?
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index d2f1c011d73a..794d7c6ea9ee 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6645,12 +6645,11 @@ static int __btrfs_free_reserved_extent(struct btrfs_root *root,
return -ENOSPC;
}
- if (btrfs_test_opt(root, DISCARD))
- ret = btrfs_discard_extent(root, start, len, NULL);
-
if (pin)
pin_down_extent(root, cache, start, len, 1);
else {
+ if (btrfs_test_opt(root, DISCARD))
+ ret = btrfs_discard_extent(root, start, len, NULL);
btrfs_add_free_space(cache, start, len);
btrfs_update_reserved_bytes(cache, len, RESERVE_FREE);
}
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 96b95e6f9f91..35696ba0318e 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2690,6 +2690,9 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 len,
if (src == dst)
return -EINVAL;
+ if (len == 0)
+ return 0;
+
btrfs_double_lock(src, loff, dst, dst_loff, len);
ret = extent_same_check_offsets(src, loff, len);
@@ -3208,6 +3211,11 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
if (off + len == src->i_size)
len = ALIGN(src->i_size, bs) - off;
+ if (len == 0) {
+ ret = 0;
+ goto out_unlock;
+ }
+
/* verify the end result is block aligned */
if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs) ||
!IS_ALIGNED(destoff, bs))
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index ad8328d797ea..488e987c3374 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -324,22 +324,42 @@ const struct xattr_handler *btrfs_xattr_handlers[] = {
/*
* Check if the attribute is in a supported namespace.
*
- * This applied after the check for the synthetic attributes in the system
+ * This is applied after the check for the synthetic attributes in the system
* namespace.
*/
-static bool btrfs_is_valid_xattr(const char *name)
+static int btrfs_is_valid_xattr(const char *name)
{
- return !strncmp(name, XATTR_SECURITY_PREFIX,
- XATTR_SECURITY_PREFIX_LEN) ||
- !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) ||
- !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
- !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) ||
- !strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN);
+ int len = strlen(name);
+ int prefixlen = 0;
+
+ if (!strncmp(name, XATTR_SECURITY_PREFIX,
+ XATTR_SECURITY_PREFIX_LEN))
+ prefixlen = XATTR_SECURITY_PREFIX_LEN;
+ else if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+ prefixlen = XATTR_SYSTEM_PREFIX_LEN;
+ else if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN))
+ prefixlen = XATTR_TRUSTED_PREFIX_LEN;
+ else if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
+ prefixlen = XATTR_USER_PREFIX_LEN;
+ else if (!strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN))
+ prefixlen = XATTR_BTRFS_PREFIX_LEN;
+ else
+ return -EOPNOTSUPP;
+
+ /*
+ * The name cannot consist of just prefix
+ */
+ if (len <= prefixlen)
+ return -EINVAL;
+
+ return 0;
}
ssize_t btrfs_getxattr(struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
+ int ret;
+
/*
* If this is a request for a synthetic attribute in the system.*
* namespace use the generic infrastructure to resolve a handler
@@ -348,8 +368,9 @@ ssize_t btrfs_getxattr(struct dentry *dentry, const char *name,
if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
return generic_getxattr(dentry, name, buffer, size);
- if (!btrfs_is_valid_xattr(name))
- return -EOPNOTSUPP;
+ ret = btrfs_is_valid_xattr(name);
+ if (ret)
+ return ret;
return __btrfs_getxattr(dentry->d_inode, name, buffer, size);
}
@@ -357,6 +378,7 @@ int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
struct btrfs_root *root = BTRFS_I(dentry->d_inode)->root;
+ int ret;
/*
* The permission on security.* and system.* is not checked
@@ -373,8 +395,9 @@ int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
return generic_setxattr(dentry, name, value, size, flags);
- if (!btrfs_is_valid_xattr(name))
- return -EOPNOTSUPP;
+ ret = btrfs_is_valid_xattr(name);
+ if (ret)
+ return ret;
if (!strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN))
return btrfs_set_prop(dentry->d_inode, name,
@@ -390,6 +413,7 @@ int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
int btrfs_removexattr(struct dentry *dentry, const char *name)
{
struct btrfs_root *root = BTRFS_I(dentry->d_inode)->root;
+ int ret;
/*
* The permission on security.* and system.* is not checked
@@ -406,8 +430,9 @@ int btrfs_removexattr(struct dentry *dentry, const char *name)
if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
return generic_removexattr(dentry, name);
- if (!btrfs_is_valid_xattr(name))
- return -EOPNOTSUPP;
+ ret = btrfs_is_valid_xattr(name);
+ if (ret)
+ return ret;
if (!strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN))
return btrfs_set_prop(dentry->d_inode, name,
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 5e0982aa7000..18e14cf8f223 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -111,7 +111,7 @@ static int fpos_cmp(loff_t l, loff_t r)
/*
* When possible, we try to satisfy a readdir by peeking at the
* dcache. We make this work by carefully ordering dentries on
- * d_u.d_child when we initially get results back from the MDS, and
+ * d_child when we initially get results back from the MDS, and
* falling back to a "normal" sync readdir if any dentries in the dir
* are dropped.
*
@@ -146,11 +146,11 @@ static int __dcache_readdir(struct file *file, struct dir_context *ctx)
p = parent->d_subdirs.prev;
dout(" initial p %p/%p\n", p->prev, p->next);
} else {
- p = last->d_u.d_child.prev;
+ p = last->d_child.prev;
}
more:
- dentry = list_entry(p, struct dentry, d_u.d_child);
+ dentry = list_entry(p, struct dentry, d_child);
di = ceph_dentry(dentry);
while (1) {
dout(" p %p/%p %s d_subdirs %p/%p\n", p->prev, p->next,
@@ -172,7 +172,7 @@ more:
!dentry->d_inode ? " null" : "");
spin_unlock(&dentry->d_lock);
p = p->prev;
- dentry = list_entry(p, struct dentry, d_u.d_child);
+ dentry = list_entry(p, struct dentry, d_child);
di = ceph_dentry(dentry);
}
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 6471f9c83428..ee24490ee925 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1289,7 +1289,7 @@ retry_lookup:
/* reorder parent's d_subdirs */
spin_lock(&parent->d_lock);
spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
- list_move(&dn->d_u.d_child, &parent->d_subdirs);
+ list_move(&dn->d_child, &parent->d_subdirs);
spin_unlock(&dn->d_lock);
spin_unlock(&parent->d_lock);
}
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index f2ddcf7ac9c3..7ee427e16f3b 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -883,7 +883,7 @@ inode_has_hashed_dentries(struct inode *inode)
struct dentry *dentry;
spin_lock(&inode->i_lock);
- hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
spin_unlock(&inode->i_lock);
return true;
diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index 1da168c61d35..9bc1147a6c5d 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -92,7 +92,7 @@ static void coda_flag_children(struct dentry *parent, int flag)
struct dentry *de;
spin_lock(&parent->d_lock);
- list_for_each_entry(de, &parent->d_subdirs, d_u.d_child) {
+ list_for_each_entry(de, &parent->d_subdirs, d_child) {
/* don't know what to do with negative dentries */
if (de->d_inode )
coda_flag_inode(de->d_inode, flag);
diff --git a/fs/dcache.c b/fs/dcache.c
index e3c556351810..1b349b56839f 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -44,7 +44,7 @@
/*
* Usage:
* dcache->d_inode->i_lock protects:
- * - i_dentry, d_alias, d_inode of aliases
+ * - i_dentry, d_u.d_alias, d_inode of aliases
* dcache_hash_bucket lock protects:
* - the dcache hash table
* s_anon bl list spinlock protects:
@@ -59,7 +59,7 @@
* - d_unhashed()
* - d_parent and d_subdirs
* - childrens' d_child and d_parent
- * - d_alias, d_inode
+ * - d_u.d_alias, d_inode
*
* Ordering:
* dentry->d_inode->i_lock
@@ -239,7 +239,6 @@ static void __d_free(struct rcu_head *head)
{
struct dentry *dentry = container_of(head, struct dentry, d_u.d_rcu);
- WARN_ON(!hlist_unhashed(&dentry->d_alias));
if (dname_external(dentry))
kfree(dentry->d_name.name);
kmem_cache_free(dentry_cache, dentry);
@@ -250,6 +249,7 @@ static void __d_free(struct rcu_head *head)
*/
static void d_free(struct dentry *dentry)
{
+ WARN_ON(!hlist_unhashed(&dentry->d_u.d_alias));
BUG_ON((int)dentry->d_lockref.count > 0);
this_cpu_dec(nr_dentry);
if (dentry->d_op && dentry->d_op->d_release)
@@ -288,7 +288,7 @@ static void dentry_iput(struct dentry * dentry)
struct inode *inode = dentry->d_inode;
if (inode) {
dentry->d_inode = NULL;
- hlist_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_u.d_alias);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
if (!inode->i_nlink)
@@ -313,7 +313,7 @@ static void dentry_unlink_inode(struct dentry * dentry)
struct inode *inode = dentry->d_inode;
__d_clear_type(dentry);
dentry->d_inode = NULL;
- hlist_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_u.d_alias);
dentry_rcuwalk_barrier(dentry);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
@@ -435,7 +435,7 @@ static struct dentry *d_kill(struct dentry *dentry, struct dentry *parent)
__releases(parent->d_lock)
__releases(dentry->d_inode->i_lock)
{
- list_del(&dentry->d_u.d_child);
+ list_del(&dentry->d_child);
/*
* Inform d_walk() that we are no longer attached to the
* dentry tree
@@ -737,7 +737,7 @@ static struct dentry *__d_find_alias(struct inode *inode, int want_discon)
again:
discon_alias = NULL;
- hlist_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) {
spin_lock(&alias->d_lock);
if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
if (IS_ROOT(alias) &&
@@ -790,7 +790,7 @@ void d_prune_aliases(struct inode *inode)
struct dentry *dentry;
restart:
spin_lock(&inode->i_lock);
- hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
spin_lock(&dentry->d_lock);
if (!dentry->d_lockref.count) {
/*
@@ -1091,7 +1091,7 @@ repeat:
resume:
while (next != &this_parent->d_subdirs) {
struct list_head *tmp = next;
- struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child);
+ struct dentry *dentry = list_entry(tmp, struct dentry, d_child);
next = tmp->next;
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
@@ -1143,7 +1143,7 @@ resume:
goto rename_retry;
}
rcu_read_unlock();
- next = child->d_u.d_child.next;
+ next = child->d_child.next;
goto resume;
}
if (need_seqretry(&rename_lock, seq)) {
@@ -1524,8 +1524,8 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
INIT_HLIST_BL_NODE(&dentry->d_hash);
INIT_LIST_HEAD(&dentry->d_lru);
INIT_LIST_HEAD(&dentry->d_subdirs);
- INIT_HLIST_NODE(&dentry->d_alias);
- INIT_LIST_HEAD(&dentry->d_u.d_child);
+ INIT_HLIST_NODE(&dentry->d_u.d_alias);
+ INIT_LIST_HEAD(&dentry->d_child);
d_set_d_op(dentry, dentry->d_sb->s_d_op);
this_cpu_inc(nr_dentry);
@@ -1555,7 +1555,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
*/
__dget_dlock(parent);
dentry->d_parent = parent;
- list_add(&dentry->d_u.d_child, &parent->d_subdirs);
+ list_add(&dentry->d_child, &parent->d_subdirs);
spin_unlock(&parent->d_lock);
return dentry;
@@ -1648,7 +1648,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
spin_lock(&dentry->d_lock);
__d_set_type(dentry, add_flags);
if (inode)
- hlist_add_head(&dentry->d_alias, &inode->i_dentry);
+ hlist_add_head(&dentry->d_u.d_alias, &inode->i_dentry);
dentry->d_inode = inode;
dentry_rcuwalk_barrier(dentry);
spin_unlock(&dentry->d_lock);
@@ -1672,7 +1672,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
void d_instantiate(struct dentry *entry, struct inode * inode)
{
- BUG_ON(!hlist_unhashed(&entry->d_alias));
+ BUG_ON(!hlist_unhashed(&entry->d_u.d_alias));
if (inode)
spin_lock(&inode->i_lock);
__d_instantiate(entry, inode);
@@ -1711,7 +1711,7 @@ static struct dentry *__d_instantiate_unique(struct dentry *entry,
return NULL;
}
- hlist_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) {
/*
* Don't need alias->d_lock here, because aliases with
* d_parent == entry->d_parent are not subject to name or
@@ -1737,7 +1737,7 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
{
struct dentry *result;
- BUG_ON(!hlist_unhashed(&entry->d_alias));
+ BUG_ON(!hlist_unhashed(&entry->d_u.d_alias));
if (inode)
spin_lock(&inode->i_lock);
@@ -1768,7 +1768,7 @@ EXPORT_SYMBOL(d_instantiate_unique);
*/
int d_instantiate_no_diralias(struct dentry *entry, struct inode *inode)
{
- BUG_ON(!hlist_unhashed(&entry->d_alias));
+ BUG_ON(!hlist_unhashed(&entry->d_u.d_alias));
spin_lock(&inode->i_lock);
if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) {
@@ -1807,7 +1807,7 @@ static struct dentry * __d_find_any_alias(struct inode *inode)
if (hlist_empty(&inode->i_dentry))
return NULL;
- alias = hlist_entry(inode->i_dentry.first, struct dentry, d_alias);
+ alias = hlist_entry(inode->i_dentry.first, struct dentry, d_u.d_alias);
__dget(alias);
return alias;
}
@@ -1884,7 +1884,7 @@ struct dentry *d_obtain_alias(struct inode *inode)
spin_lock(&tmp->d_lock);
tmp->d_inode = inode;
tmp->d_flags |= add_flags;
- hlist_add_head(&tmp->d_alias, &inode->i_dentry);
+ hlist_add_head(&tmp->d_u.d_alias, &inode->i_dentry);
hlist_bl_lock(&tmp->d_sb->s_anon);
hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon);
hlist_bl_unlock(&tmp->d_sb->s_anon);
@@ -2327,7 +2327,7 @@ int d_validate(struct dentry *dentry, struct dentry *dparent)
struct dentry *child;
spin_lock(&dparent->d_lock);
- list_for_each_entry(child, &dparent->d_subdirs, d_u.d_child) {
+ list_for_each_entry(child, &dparent->d_subdirs, d_child) {
if (dentry == child) {
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
__dget_dlock(dentry);
@@ -2585,8 +2585,8 @@ static void __d_move(struct dentry *dentry, struct dentry *target,
d_hash(dentry->d_parent, dentry->d_name.hash));
}
- list_del(&dentry->d_u.d_child);
- list_del(&target->d_u.d_child);
+ list_del(&dentry->d_child);
+ list_del(&target->d_child);
/* Switch the names.. */
switch_names(dentry, target);
@@ -2596,15 +2596,15 @@ static void __d_move(struct dentry *dentry, struct dentry *target,
if (IS_ROOT(dentry)) {
dentry->d_parent = target->d_parent;
target->d_parent = target;
- INIT_LIST_HEAD(&target->d_u.d_child);
+ INIT_LIST_HEAD(&target->d_child);
} else {
swap(dentry->d_parent, target->d_parent);
/* And add them back to the (new) parent lists */
- list_add(&target->d_u.d_child, &target->d_parent->d_subdirs);
+ list_add(&target->d_child, &target->d_parent->d_subdirs);
}
- list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs);
+ list_add(&dentry->d_child, &dentry->d_parent->d_subdirs);
write_seqcount_end(&target->d_seq);
write_seqcount_end(&dentry->d_seq);
@@ -2732,9 +2732,9 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
swap(dentry->d_name.hash, anon->d_name.hash);
dentry->d_parent = dentry;
- list_del_init(&dentry->d_u.d_child);
+ list_del_init(&dentry->d_child);
anon->d_parent = dparent;
- list_move(&anon->d_u.d_child, &dparent->d_subdirs);
+ list_move(&anon->d_child, &dparent->d_subdirs);
write_seqcount_end(&dentry->d_seq);
write_seqcount_end(&anon->d_seq);
@@ -3365,7 +3365,7 @@ void d_tmpfile(struct dentry *dentry, struct inode *inode)
{
inode_dec_link_count(inode);
BUG_ON(dentry->d_name.name != dentry->d_iname ||
- !hlist_unhashed(&dentry->d_alias) ||
+ !hlist_unhashed(&dentry->d_u.d_alias) ||
!d_unlinked(dentry));
spin_lock(&dentry->d_parent->d_lock);
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 1ff8fe5dab0d..4a9f0e0c6644 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -552,7 +552,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
* use the d_u.d_child as the rcu head and corrupt this list.
*/
spin_lock(&parent->d_lock);
- list_for_each_entry(child, &parent->d_subdirs, d_u.d_child) {
+ list_for_each_entry(child, &parent->d_subdirs, d_child) {
if (!debugfs_positive(child))
continue;
diff --git a/fs/exec.c b/fs/exec.c
index ea4449d0536a..05f1942d7edb 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1268,6 +1268,53 @@ static void check_unsafe_exec(struct linux_binprm *bprm)
spin_unlock(&p->fs->lock);
}
+static void bprm_fill_uid(struct linux_binprm *bprm)
+{
+ struct inode *inode;
+ unsigned int mode;
+ kuid_t uid;
+ kgid_t gid;
+
+ /* clear any previous set[ug]id data from a previous binary */
+ bprm->cred->euid = current_euid();
+ bprm->cred->egid = current_egid();
+
+ if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
+ return;
+
+ if (current->no_new_privs)
+ return;
+
+ inode = file_inode(bprm->file);
+ mode = ACCESS_ONCE(inode->i_mode);
+ if (!(mode & (S_ISUID|S_ISGID)))
+ return;
+
+ /* Be careful if suid/sgid is set */
+ mutex_lock(&inode->i_mutex);
+
+ /* reload atomically mode/uid/gid now that lock held */
+ mode = inode->i_mode;
+ uid = inode->i_uid;
+ gid = inode->i_gid;
+ mutex_unlock(&inode->i_mutex);
+
+ /* We ignore suid/sgid if there are no mappings for them in the ns */
+ if (!kuid_has_mapping(bprm->cred->user_ns, uid) ||
+ !kgid_has_mapping(bprm->cred->user_ns, gid))
+ return;
+
+ if (mode & S_ISUID) {
+ bprm->per_clear |= PER_CLEAR_ON_SETID;
+ bprm->cred->euid = uid;
+ }
+
+ if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
+ bprm->per_clear |= PER_CLEAR_ON_SETID;
+ bprm->cred->egid = gid;
+ }
+}
+
/*
* Fill the binprm structure from the inode.
* Check permissions, then read the first 128 (BINPRM_BUF_SIZE) bytes
@@ -1276,36 +1323,9 @@ static void check_unsafe_exec(struct linux_binprm *bprm)
*/
int prepare_binprm(struct linux_binprm *bprm)
{
- struct inode *inode = file_inode(bprm->file);
- umode_t mode = inode->i_mode;
int retval;
-
- /* clear any previous set[ug]id data from a previous binary */
- bprm->cred->euid = current_euid();
- bprm->cred->egid = current_egid();
-
- if (!(bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID) &&
- !current->no_new_privs &&
- kuid_has_mapping(bprm->cred->user_ns, inode->i_uid) &&
- kgid_has_mapping(bprm->cred->user_ns, inode->i_gid)) {
- /* Set-uid? */
- if (mode & S_ISUID) {
- bprm->per_clear |= PER_CLEAR_ON_SETID;
- bprm->cred->euid = inode->i_uid;
- }
-
- /* Set-gid? */
- /*
- * If setgid is set but no group execute bit then this
- * is a candidate for mandatory locking, not a setgid
- * executable.
- */
- if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
- bprm->per_clear |= PER_CLEAR_ON_SETID;
- bprm->cred->egid = inode->i_gid;
- }
- }
+ bprm_fill_uid(bprm);
/* fill in binprm security blob */
retval = security_bprm_set_creds(bprm);
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 59d339c417c9..aab21e5a545d 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -50,7 +50,7 @@ find_acceptable_alias(struct dentry *result,
inode = result->d_inode;
spin_lock(&inode->i_lock);
- hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
dget(dentry);
spin_unlock(&inode->i_lock);
if (toput)
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 98de4b391e79..8fb2db7deeb7 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1869,7 +1869,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode)
{
struct inode *dir = dentry->d_parent->d_inode;
- struct buffer_head *bh;
+ struct buffer_head *bh = NULL;
struct ext4_dir_entry_2 *de;
struct ext4_dir_entry_tail *t;
struct super_block *sb;
@@ -1893,14 +1893,14 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
return retval;
if (retval == 1) {
retval = 0;
- return retval;
+ goto out;
}
}
if (is_dx(dir)) {
retval = ext4_dx_add_entry(handle, dentry, inode);
if (!retval || (retval != ERR_BAD_DX_DIR))
- return retval;
+ goto out;
ext4_clear_inode_flag(dir, EXT4_INODE_INDEX);
dx_fallback++;
ext4_mark_inode_dirty(handle, dir);
@@ -1912,14 +1912,15 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
return PTR_ERR(bh);
retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
- if (retval != -ENOSPC) {
- brelse(bh);
- return retval;
- }
+ if (retval != -ENOSPC)
+ goto out;
if (blocks == 1 && !dx_fallback &&
- EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX))
- return make_indexed_dir(handle, dentry, inode, bh);
+ EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) {
+ retval = make_indexed_dir(handle, dentry, inode, bh);
+ bh = NULL; /* make_indexed_dir releases bh */
+ goto out;
+ }
brelse(bh);
}
bh = ext4_append(handle, dir, &block);
@@ -1935,6 +1936,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
}
retval = add_dirent_to_buf(handle, dentry, inode, de, bh);
+out:
brelse(bh);
if (retval == 0)
ext4_set_inode_state(inode, EXT4_STATE_NEWENTRY);
diff --git a/fs/libfs.c b/fs/libfs.c
index a1844244246f..868c0b70a30e 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -113,18 +113,18 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int whence)
spin_lock(&dentry->d_lock);
/* d_lock not required for cursor */
- list_del(&cursor->d_u.d_child);
+ list_del(&cursor->d_child);
p = dentry->d_subdirs.next;
while (n && p != &dentry->d_subdirs) {
struct dentry *next;
- next = list_entry(p, struct dentry, d_u.d_child);
+ next = list_entry(p, struct dentry, d_child);
spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
if (simple_positive(next))
n--;
spin_unlock(&next->d_lock);
p = p->next;
}
- list_add_tail(&cursor->d_u.d_child, p);
+ list_add_tail(&cursor->d_child, p);
spin_unlock(&dentry->d_lock);
}
}
@@ -149,7 +149,7 @@ int dcache_readdir(struct file *file, struct dir_context *ctx)
{
struct dentry *dentry = file->f_path.dentry;
struct dentry *cursor = file->private_data;
- struct list_head *p, *q = &cursor->d_u.d_child;
+ struct list_head *p, *q = &cursor->d_child;
if (!dir_emit_dots(file, ctx))
return 0;
@@ -158,7 +158,7 @@ int dcache_readdir(struct file *file, struct dir_context *ctx)
list_move(q, &dentry->d_subdirs);
for (p = q->next; p != &dentry->d_subdirs; p = p->next) {
- struct dentry *next = list_entry(p, struct dentry, d_u.d_child);
+ struct dentry *next = list_entry(p, struct dentry, d_child);
spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
if (!simple_positive(next)) {
spin_unlock(&next->d_lock);
@@ -286,7 +286,7 @@ int simple_empty(struct dentry *dentry)
int ret = 0;
spin_lock(&dentry->d_lock);
- list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) {
+ list_for_each_entry(child, &dentry->d_subdirs, d_child) {
spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
if (simple_positive(child)) {
spin_unlock(&child->d_lock);
diff --git a/fs/namei.c b/fs/namei.c
index 0fbf1504fb63..7ee6af0672b2 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1546,7 +1546,8 @@ static inline int walk_component(struct nameidata *nd, struct path *path,
if (should_follow_link(path->dentry, follow)) {
if (nd->flags & LOOKUP_RCU) {
- if (unlikely(unlazy_walk(nd, path->dentry))) {
+ if (unlikely(nd->path.mnt != path->mnt ||
+ unlazy_walk(nd, path->dentry))) {
err = -ECHILD;
goto out_err;
}
@@ -2988,7 +2989,8 @@ finish_lookup:
if (should_follow_link(path->dentry, !symlink_ok)) {
if (nd->flags & LOOKUP_RCU) {
- if (unlikely(unlazy_walk(nd, path->dentry))) {
+ if (unlikely(nd->path.mnt != path->mnt ||
+ unlazy_walk(nd, path->dentry))) {
error = -ECHILD;
goto out;
}
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index c320ac52353e..dc9747d6a4d0 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -406,7 +406,7 @@ ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
- dent = list_entry(next, struct dentry, d_u.d_child);
+ dent = list_entry(next, struct dentry, d_child);
if ((unsigned long)dent->d_fsdata == fpos) {
if (dent->d_inode)
dget(dent);
diff --git a/fs/ncpfs/ncplib_kernel.h b/fs/ncpfs/ncplib_kernel.h
index 32c06587351a..6d5e7c56c79d 100644
--- a/fs/ncpfs/ncplib_kernel.h
+++ b/fs/ncpfs/ncplib_kernel.h
@@ -194,7 +194,7 @@ ncp_renew_dentries(struct dentry *parent)
spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
- dentry = list_entry(next, struct dentry, d_u.d_child);
+ dentry = list_entry(next, struct dentry, d_child);
if (dentry->d_fsdata == NULL)
ncp_age_dentry(server, dentry);
@@ -216,7 +216,7 @@ ncp_invalidate_dircache_entries(struct dentry *parent)
spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
- dentry = list_entry(next, struct dentry, d_u.d_child);
+ dentry = list_entry(next, struct dentry, d_child);
dentry->d_fsdata = NULL;
ncp_age_dentry(server, dentry);
next = next->next;
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 66984a9aafaa..5b8ab0e444f9 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -58,7 +58,7 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
*/
spin_lock(&sb->s_root->d_inode->i_lock);
spin_lock(&sb->s_root->d_lock);
- hlist_del_init(&sb->s_root->d_alias);
+ hlist_del_init(&sb->s_root->d_u.d_alias);
spin_unlock(&sb->s_root->d_lock);
spin_unlock(&sb->s_root->d_inode->i_lock);
}
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 9d3e9c50066a..700129940c6e 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -63,14 +63,14 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
spin_lock(&inode->i_lock);
/* run all of the dentries associated with this inode. Since this is a
* directory, there damn well better only be one item on this list */
- hlist_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) {
struct dentry *child;
/* run all of the children of the original inode and fix their
* d_flags to indicate parental interest (their parent is the
* original inode) */
spin_lock(&alias->d_lock);
- list_for_each_entry(child, &alias->d_subdirs, d_u.d_child) {
+ list_for_each_entry(child, &alias->d_subdirs, d_child) {
if (!child->d_inode)
continue;
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index 0d3a97d2d5f6..116748502bae 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -173,7 +173,7 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
struct dentry *dentry;
spin_lock(&inode->i_lock);
- hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
spin_lock(&dentry->d_lock);
if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
trace_ocfs2_find_local_alias(dentry->d_name.len,
diff --git a/fs/open.c b/fs/open.c
index c92c6ef8bf6d..8d30711435d8 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -539,6 +539,7 @@ static int chown_common(struct path *path, uid_t user, gid_t group)
uid = make_kuid(current_user_ns(), user);
gid = make_kgid(current_user_ns(), group);
+retry_deleg:
newattrs.ia_valid = ATTR_CTIME;
if (user != (uid_t) -1) {
if (!uid_valid(uid))
@@ -555,7 +556,6 @@ static int chown_common(struct path *path, uid_t user, gid_t group)
if (!S_ISDIR(inode->i_mode))
newattrs.ia_valid |=
ATTR_KILL_SUID | ATTR_KILL_SGID | ATTR_KILL_PRIV;
-retry_deleg:
mutex_lock(&inode->i_mutex);
error = security_path_chown(path, uid, gid);
if (!error)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index c2546717fc2b..eaa7374305a3 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -993,9 +993,8 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
struct vm_area_struct *vma;
struct pagemapread *pm = walk->private;
spinlock_t *ptl;
- pte_t *pte;
+ pte_t *pte, *orig_pte;
int err = 0;
- pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2));
/* find the first VMA at or above 'addr' */
vma = find_vma(walk->mm, addr);
@@ -1009,6 +1008,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
for (; addr != end; addr += PAGE_SIZE) {
unsigned long offset;
+ pagemap_entry_t pme;
offset = (addr & ~PAGEMAP_WALK_MASK) >>
PAGE_SHIFT;
@@ -1023,32 +1023,55 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
if (pmd_trans_unstable(pmd))
return 0;
- for (; addr != end; addr += PAGE_SIZE) {
- int flags2;
-
- /* check to see if we've left 'vma' behind
- * and need a new, higher one */
- if (vma && (addr >= vma->vm_end)) {
- vma = find_vma(walk->mm, addr);
- if (vma && (vma->vm_flags & VM_SOFTDIRTY))
- flags2 = __PM_SOFT_DIRTY;
- else
- flags2 = 0;
- pme = make_pme(PM_NOT_PRESENT(pm->v2) | PM_STATUS2(pm->v2, flags2));
+
+ while (1) {
+ /* End of address space hole, which we mark as non-present. */
+ unsigned long hole_end;
+
+ if (vma)
+ hole_end = min(end, vma->vm_start);
+ else
+ hole_end = end;
+
+ for (; addr < hole_end; addr += PAGE_SIZE) {
+ pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2));
+
+ err = add_to_pagemap(addr, &pme, pm);
+ if (err)
+ return err;
}
- /* check that 'vma' actually covers this address,
- * and that it isn't a huge page vma */
- if (vma && (vma->vm_start <= addr) &&
- !is_vm_hugetlb_page(vma)) {
- pte = pte_offset_map(pmd, addr);
+ if (!vma || vma->vm_start >= end)
+ break;
+ /*
+ * We can't possibly be in a hugetlb VMA. In general,
+ * for a mm_walk with a pmd_entry and a hugetlb_entry,
+ * the pmd_entry can only be called on addresses in a
+ * hugetlb if the walk starts in a non-hugetlb VMA and
+ * spans a hugepage VMA. Since pagemap_read walks are
+ * PMD-sized and PMD-aligned, this will never be true.
+ */
+ BUG_ON(is_vm_hugetlb_page(vma));
+
+ /* Addresses in the VMA. */
+ orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+ for (; addr < min(end, vma->vm_end); pte++, addr += PAGE_SIZE) {
+ pagemap_entry_t pme;
+
pte_to_pagemap_entry(&pme, pm, vma, addr, *pte);
- /* unmap before userspace copy */
- pte_unmap(pte);
+ err = add_to_pagemap(addr, &pme, pm);
+ if (err)
+ break;
}
- err = add_to_pagemap(addr, &pme, pm);
+ pte_unmap_unlock(orig_pte, ptl);
+
if (err)
return err;
+
+ if (addr == end)
+ break;
+
+ vma = find_vma(walk->mm, addr);
}
cond_resched();