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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull vfs fixes from Al Viro:
 "Several obvious fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  Fix mountpoint reference leakage in linkat
  hfsplus: use xattr handlers for removexattr
  Typo in compat_sys_lseek() declaration
  fs/super.c: sync ro remount after blocking writers
  vfs: unexport the getname() symbol
This commit is contained in:
Linus Torvalds 2014-02-01 10:43:45 -08:00
commit efc518eb31
7 changed files with 26 additions and 51 deletions
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2
fs/hfsplus/dir.c
View File

@ -529,7 +529,7 @@ const struct inode_operations hfsplus_dir_inode_operations = {
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr,
.removexattr = hfsplus_removexattr,
.removexattr = generic_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl,

2
fs/hfsplus/inode.c
View File

@ -331,7 +331,7 @@ static const struct inode_operations hfsplus_file_inode_operations = {
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr,
.removexattr = hfsplus_removexattr,
.removexattr = generic_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl,

60
fs/hfsplus/xattr.c
View File

@ -11,6 +11,8 @@
#include "xattr.h"
#include "acl.h"
static int hfsplus_removexattr(struct inode *inode, const char *name);
const struct xattr_handler *hfsplus_xattr_handlers[] = {
&hfsplus_xattr_osx_handler,
&hfsplus_xattr_user_handler,
@ -274,14 +276,8 @@ int __hfsplus_setxattr(struct inode *inode, const char *name,
HFSPLUS_IS_RSRC(inode))
return -EOPNOTSUPP;
if (strncmp(name, XATTR_MAC_OSX_PREFIX,
XATTR_MAC_OSX_PREFIX_LEN) == 0)
name += XATTR_MAC_OSX_PREFIX_LEN;
if (value == NULL) {
value = "";
size = 0;
}
if (value == NULL)
return hfsplus_removexattr(inode, name);
err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
if (err) {
@ -399,16 +395,11 @@ int __hfsplus_setxattr(struct inode *inode, const char *name,
return err;
}
static inline int is_osx_xattr(const char *xattr_name)
{
return !is_known_namespace(xattr_name);
}
static int name_len(const char *xattr_name, int xattr_name_len)
{
int len = xattr_name_len + 1;
if (is_osx_xattr(xattr_name))
if (!is_known_namespace(xattr_name))
len += XATTR_MAC_OSX_PREFIX_LEN;
return len;
@ -419,7 +410,7 @@ static int copy_name(char *buffer, const char *xattr_name, int name_len)
int len = name_len;
int offset = 0;
if (is_osx_xattr(xattr_name)) {
if (!is_known_namespace(xattr_name)) {
strncpy(buffer, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN);
offset += XATTR_MAC_OSX_PREFIX_LEN;
len += XATTR_MAC_OSX_PREFIX_LEN;
@ -497,18 +488,6 @@ ssize_t __hfsplus_getxattr(struct inode *inode, const char *name,
HFSPLUS_IS_RSRC(inode))
return -EOPNOTSUPP;
if (strncmp(name, XATTR_MAC_OSX_PREFIX,
XATTR_MAC_OSX_PREFIX_LEN) == 0) {
/* skip "osx." prefix */
name += XATTR_MAC_OSX_PREFIX_LEN;
/*
* Don't allow retrieving properly prefixed attributes
* by prepending them with "osx."
*/
if (is_known_namespace(name))
return -EOPNOTSUPP;
}
if (!strcmp_xattr_finder_info(name))
return hfsplus_getxattr_finder_info(inode, value, size);
@ -743,28 +722,18 @@ ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size)
return res;
}
int hfsplus_removexattr(struct dentry *dentry, const char *name)
static int hfsplus_removexattr(struct inode *inode, const char *name)
{
int err = 0;
struct inode *inode = dentry->d_inode;
struct hfs_find_data cat_fd;
u16 flags;
u16 cat_entry_type;
int is_xattr_acl_deleted = 0;
int is_all_xattrs_deleted = 0;
if ((!S_ISREG(inode->i_mode) &&
!S_ISDIR(inode->i_mode)) ||
HFSPLUS_IS_RSRC(inode))
return -EOPNOTSUPP;
if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
return -EOPNOTSUPP;
if (strncmp(name, XATTR_MAC_OSX_PREFIX,
XATTR_MAC_OSX_PREFIX_LEN) == 0)
name += XATTR_MAC_OSX_PREFIX_LEN;
if (!strcmp_xattr_finder_info(name))
return -EOPNOTSUPP;
@ -838,8 +807,12 @@ static int hfsplus_osx_getxattr(struct dentry *dentry, const char *name,
if (len > HFSPLUS_ATTR_MAX_STRLEN)
return -EOPNOTSUPP;
strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
/*
* Don't allow retrieving properly prefixed attributes
* by prepending them with "osx."
*/
if (is_known_namespace(name))
return -EOPNOTSUPP;
return hfsplus_getxattr(dentry, xattr_name, buffer, size);
}
@ -857,12 +830,13 @@ static int hfsplus_osx_setxattr(struct dentry *dentry, const char *name,
if (len > HFSPLUS_ATTR_MAX_STRLEN)
return -EOPNOTSUPP;
/*
* Don't allow setting properly prefixed attributes
* by prepending them with "osx."
*/
if (is_known_namespace(name))
return -EOPNOTSUPP;
strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
}

2
fs/hfsplus/xattr.h
View File

@ -40,8 +40,6 @@ static inline ssize_t hfsplus_getxattr(struct dentry *dentry,
ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
int hfsplus_removexattr(struct dentry *dentry, const char *name);
int hfsplus_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr);

6
fs/namei.c
View File

@ -209,7 +209,6 @@ getname(const char __user * filename)
{
return getname_flags(filename, 0, NULL);
}
EXPORT_SYMBOL(getname);
#ifdef CONFIG_AUDITSYSCALL
void putname(struct filename *name)
@ -3927,10 +3926,13 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
done_path_create(&new_path, new_dentry);
if (delegated_inode) {
error = break_deleg_wait(&delegated_inode);
if (!error)
if (!error) {
path_put(&old_path);
goto retry;
}
}
if (retry_estale(error, how)) {
path_put(&old_path);
how |= LOOKUP_REVAL;
goto retry;
}

3
fs/super.c
View File

@ -703,7 +703,6 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
if (flags & MS_RDONLY)
acct_auto_close(sb);
shrink_dcache_sb(sb);
sync_filesystem(sb);
remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY);
@ -720,6 +719,8 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
}
}
sync_filesystem(sb);
if (sb->s_op->remount_fs) {
retval = sb->s_op->remount_fs(sb, &flags, data);
if (retval) {

2
include/linux/compat.h
View File

@ -337,7 +337,7 @@ asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
const struct compat_iovec __user *vec,
compat_ulong_t vlen, u32 pos_low, u32 pos_high);
asmlinkage long comat_sys_lseek(unsigned int, compat_off_t, unsigned int);
asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
const compat_uptr_t __user *envp);