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6 smb3 client fixes, 3 for stable

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Merge tag '5.17-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Six small smb3 client fixes, three for stable:

   - fix for snapshot mount option

   - two ACL related fixes

   - use after free race fix

   - fix for confusing warning message logged with older dialects"

* tag '5.17-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix confusing unneeded warning message on smb2.1 and earlier
  cifs: modefromsids must add an ACE for authenticated users
  cifs: fix double free race when mount fails in cifs_get_root()
  cifs: do not use uninitialized data in the owner/group sid
  cifs: fix set of group SID via NTSD xattrs
  smb3: fix snapshot mount option
This commit is contained in:
Linus Torvalds 2022-02-18 09:04:27 -08:00
commit 7476b043b1
5 changed files with 17 additions and 10 deletions
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9
fs/cifs/cifsacl.c
View file

@ -949,6 +949,9 @@ static void populate_new_aces(char *nacl_base,
pnntace = (struct cifs_ace *) (nacl_base + nsize);
nsize += setup_special_mode_ACE(pnntace, nmode);
num_aces++;
pnntace = (struct cifs_ace *) (nacl_base + nsize);
nsize += setup_authusers_ACE(pnntace);
num_aces++;
goto set_size;
}
@ -1297,7 +1300,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
if (uid_valid(uid)) { /* chown */
uid_t id;
nowner_sid_ptr = kmalloc(sizeof(struct cifs_sid),
nowner_sid_ptr = kzalloc(sizeof(struct cifs_sid),
GFP_KERNEL);
if (!nowner_sid_ptr) {
rc = -ENOMEM;
@ -1326,7 +1329,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
}
if (gid_valid(gid)) { /* chgrp */
gid_t id;
ngroup_sid_ptr = kmalloc(sizeof(struct cifs_sid),
ngroup_sid_ptr = kzalloc(sizeof(struct cifs_sid),
GFP_KERNEL);
if (!ngroup_sid_ptr) {
rc = -ENOMEM;
@ -1613,7 +1616,7 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 *pnmode,
nsecdesclen = secdesclen;
if (pnmode && *pnmode != NO_CHANGE_64) { /* chmod */
if (mode_from_sid)
nsecdesclen += sizeof(struct cifs_ace);
nsecdesclen += 2 * sizeof(struct cifs_ace);
else /* cifsacl */
nsecdesclen += 5 * sizeof(struct cifs_ace);
} else { /* chown */

1
fs/cifs/cifsfs.c
View file

@ -919,6 +919,7 @@ cifs_smb3_do_mount(struct file_system_type *fs_type,
out_super:
deactivate_locked_super(sb);
return root;
out:
if (cifs_sb) {
kfree(cifs_sb->prepath);

4
fs/cifs/fs_context.c
View file

@ -149,7 +149,7 @@ const struct fs_parameter_spec smb3_fs_parameters[] = {
fsparam_u32("echo_interval", Opt_echo_interval),
fsparam_u32("max_credits", Opt_max_credits),
fsparam_u32("handletimeout", Opt_handletimeout),
fsparam_u32("snapshot", Opt_snapshot),
fsparam_u64("snapshot", Opt_snapshot),
fsparam_u32("max_channels", Opt_max_channels),
/* Mount options which take string value */
@ -1078,7 +1078,7 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
ctx->echo_interval = result.uint_32;
break;
case Opt_snapshot:
ctx->snapshot_time = result.uint_32;
ctx->snapshot_time = result.uint_64;
break;
case Opt_max_credits:
if (result.uint_32 < 20 || result.uint_32 > 60000) {

11
fs/cifs/sess.c
View file

@ -127,11 +127,6 @@ int cifs_try_adding_channels(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses)
struct cifs_server_iface *ifaces = NULL;
size_t iface_count;
if (ses->server->dialect < SMB30_PROT_ID) {
cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n");
return 0;
}
spin_lock(&ses->chan_lock);
new_chan_count = old_chan_count = ses->chan_count;
@ -145,6 +140,12 @@ int cifs_try_adding_channels(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses)
return 0;
}
if (ses->server->dialect < SMB30_PROT_ID) {
spin_unlock(&ses->chan_lock);
cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n");
return 0;
}
if (!(ses->server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
ses->chan_max = 1;
spin_unlock(&ses->chan_lock);

2
fs/cifs/xattr.c
View file

@ -175,11 +175,13 @@ static int cifs_xattr_set(const struct xattr_handler *handler,
switch (handler->flags) {
case XATTR_CIFS_NTSD_FULL:
aclflags = (CIFS_ACL_OWNER |
CIFS_ACL_GROUP |
CIFS_ACL_DACL |
CIFS_ACL_SACL);
break;
case XATTR_CIFS_NTSD:
aclflags = (CIFS_ACL_OWNER |
CIFS_ACL_GROUP |
CIFS_ACL_DACL);
break;
case XATTR_CIFS_ACL: