summaryrefslogtreecommitdiff
path: root/fs/smb/client/cifsacl.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/smb/client/cifsacl.c')
-rw-r--r--fs/smb/client/cifsacl.c59
1 files changed, 34 insertions, 25 deletions
diff --git a/fs/smb/client/cifsacl.c b/fs/smb/client/cifsacl.c
index ba79aa2107cc..64bd68f750f8 100644
--- a/fs/smb/client/cifsacl.c
+++ b/fs/smb/client/cifsacl.c
@@ -763,7 +763,7 @@ static void parse_dacl(struct smb_acl *pdacl, char *end_of_acl,
struct cifs_fattr *fattr, bool mode_from_special_sid)
{
int i;
- int num_aces = 0;
+ u16 num_aces = 0;
int acl_size;
char *acl_base;
struct smb_ace **ppace;
@@ -778,14 +778,15 @@ static void parse_dacl(struct smb_acl *pdacl, char *end_of_acl,
}
/* validate that we do not go past end of acl */
- if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) {
+ if (end_of_acl < (char *)pdacl + sizeof(struct smb_acl) ||
+ end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) {
cifs_dbg(VFS, "ACL too small to parse DACL\n");
return;
}
cifs_dbg(NOISY, "DACL revision %d size %d num aces %d\n",
le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size),
- le32_to_cpu(pdacl->num_aces));
+ le16_to_cpu(pdacl->num_aces));
/* reset rwx permissions for user/group/other.
Also, if num_aces is 0 i.e. DACL has no ACEs,
@@ -795,12 +796,15 @@ static void parse_dacl(struct smb_acl *pdacl, char *end_of_acl,
acl_base = (char *)pdacl;
acl_size = sizeof(struct smb_acl);
- num_aces = le32_to_cpu(pdacl->num_aces);
+ num_aces = le16_to_cpu(pdacl->num_aces);
if (num_aces > 0) {
umode_t denied_mode = 0;
- if (num_aces > ULONG_MAX / sizeof(struct smb_ace *))
+ if (num_aces > (le16_to_cpu(pdacl->size) - sizeof(struct smb_acl)) /
+ (offsetof(struct smb_ace, sid) +
+ offsetof(struct smb_sid, sub_auth) + sizeof(__le16)))
return;
+
ppace = kmalloc_array(num_aces, sizeof(struct smb_ace *),
GFP_KERNEL);
if (!ppace)
@@ -937,12 +941,12 @@ unsigned int setup_special_user_owner_ACE(struct smb_ace *pntace)
static void populate_new_aces(char *nacl_base,
struct smb_sid *pownersid,
struct smb_sid *pgrpsid,
- __u64 *pnmode, u32 *pnum_aces, u16 *pnsize,
+ __u64 *pnmode, u16 *pnum_aces, u16 *pnsize,
bool modefromsid,
bool posix)
{
__u64 nmode;
- u32 num_aces = 0;
+ u16 num_aces = 0;
u16 nsize = 0;
__u64 user_mode;
__u64 group_mode;
@@ -1050,7 +1054,7 @@ static __u16 replace_sids_and_copy_aces(struct smb_acl *pdacl, struct smb_acl *p
u16 size = 0;
struct smb_ace *pntace = NULL;
char *acl_base = NULL;
- u32 src_num_aces = 0;
+ u16 src_num_aces = 0;
u16 nsize = 0;
struct smb_ace *pnntace = NULL;
char *nacl_base = NULL;
@@ -1058,7 +1062,7 @@ static __u16 replace_sids_and_copy_aces(struct smb_acl *pdacl, struct smb_acl *p
acl_base = (char *)pdacl;
size = sizeof(struct smb_acl);
- src_num_aces = le32_to_cpu(pdacl->num_aces);
+ src_num_aces = le16_to_cpu(pdacl->num_aces);
nacl_base = (char *)pndacl;
nsize = sizeof(struct smb_acl);
@@ -1090,11 +1094,11 @@ static int set_chmod_dacl(struct smb_acl *pdacl, struct smb_acl *pndacl,
u16 size = 0;
struct smb_ace *pntace = NULL;
char *acl_base = NULL;
- u32 src_num_aces = 0;
+ u16 src_num_aces = 0;
u16 nsize = 0;
struct smb_ace *pnntace = NULL;
char *nacl_base = NULL;
- u32 num_aces = 0;
+ u16 num_aces = 0;
bool new_aces_set = false;
/* Assuming that pndacl and pnmode are never NULL */
@@ -1112,7 +1116,7 @@ static int set_chmod_dacl(struct smb_acl *pdacl, struct smb_acl *pndacl,
acl_base = (char *)pdacl;
size = sizeof(struct smb_acl);
- src_num_aces = le32_to_cpu(pdacl->num_aces);
+ src_num_aces = le16_to_cpu(pdacl->num_aces);
/* Retain old ACEs which we can retain */
for (i = 0; i < src_num_aces; ++i) {
@@ -1158,7 +1162,7 @@ next_ace:
}
finalize_dacl:
- pndacl->num_aces = cpu_to_le32(num_aces);
+ pndacl->num_aces = cpu_to_le16(num_aces);
pndacl->size = cpu_to_le16(nsize);
return 0;
@@ -1293,7 +1297,7 @@ static int build_sec_desc(struct smb_ntsd *pntsd, struct smb_ntsd *pnntsd,
dacloffset ? dacl_ptr->revision : cpu_to_le16(ACL_REVISION);
ndacl_ptr->size = cpu_to_le16(0);
- ndacl_ptr->num_aces = cpu_to_le32(0);
+ ndacl_ptr->num_aces = cpu_to_le16(0);
rc = set_chmod_dacl(dacl_ptr, ndacl_ptr, owner_sid_ptr, group_sid_ptr,
pnmode, mode_from_sid, posix);
@@ -1395,7 +1399,7 @@ chown_chgrp_exit:
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
const struct cifs_fid *cifsfid, u32 *pacllen,
- u32 __maybe_unused unused)
+ u32 info)
{
struct smb_ntsd *pntsd = NULL;
unsigned int xid;
@@ -1407,7 +1411,7 @@ struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
xid = get_xid();
rc = CIFSSMBGetCIFSACL(xid, tlink_tcon(tlink), cifsfid->netfid, &pntsd,
- pacllen);
+ pacllen, info);
free_xid(xid);
cifs_put_tlink(tlink);
@@ -1419,7 +1423,7 @@ struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
}
static struct smb_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
- const char *path, u32 *pacllen)
+ const char *path, u32 *pacllen, u32 info)
{
struct smb_ntsd *pntsd = NULL;
int oplock = 0;
@@ -1446,9 +1450,12 @@ static struct smb_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
.fid = &fid,
};
+ if (info & SACL_SECINFO)
+ oparms.desired_access |= SYSTEM_SECURITY;
+
rc = CIFS_open(xid, &oparms, &oplock, NULL);
if (!rc) {
- rc = CIFSSMBGetCIFSACL(xid, tcon, fid.netfid, &pntsd, pacllen);
+ rc = CIFSSMBGetCIFSACL(xid, tcon, fid.netfid, &pntsd, pacllen, info);
CIFSSMBClose(xid, tcon, fid.netfid);
}
@@ -1472,7 +1479,7 @@ struct smb_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb,
if (inode)
open_file = find_readable_file(CIFS_I(inode), true);
if (!open_file)
- return get_cifs_acl_by_path(cifs_sb, path, pacllen);
+ return get_cifs_acl_by_path(cifs_sb, path, pacllen, info);
pntsd = get_cifs_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
cifsFileInfo_put(open_file);
@@ -1485,7 +1492,7 @@ int set_cifs_acl(struct smb_ntsd *pnntsd, __u32 acllen,
{
int oplock = 0;
unsigned int xid;
- int rc, access_flags;
+ int rc, access_flags = 0;
struct cifs_tcon *tcon;
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
@@ -1498,10 +1505,12 @@ int set_cifs_acl(struct smb_ntsd *pnntsd, __u32 acllen,
tcon = tlink_tcon(tlink);
xid = get_xid();
- if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
- access_flags = WRITE_OWNER;
- else
- access_flags = WRITE_DAC;
+ if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
+ access_flags |= WRITE_OWNER;
+ if (aclflag & CIFS_ACL_SACL)
+ access_flags |= SYSTEM_SECURITY;
+ if (aclflag & CIFS_ACL_DACL)
+ access_flags |= WRITE_DAC;
oparms = (struct cifs_open_parms) {
.tcon = tcon,
@@ -1648,7 +1657,7 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 *pnmode,
dacl_ptr = (struct smb_acl *)((char *)pntsd + dacloffset);
if (mode_from_sid)
nsecdesclen +=
- le32_to_cpu(dacl_ptr->num_aces) * sizeof(struct smb_ace);
+ le16_to_cpu(dacl_ptr->num_aces) * sizeof(struct smb_ace);
else /* cifsacl */
nsecdesclen += le16_to_cpu(dacl_ptr->size);
}