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a few small SMB3 fixes, and a larger one to fix various older string handling functions 

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Merge tag '5.3-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "A few small SMB3 fixes, and a larger one to fix various older string
  handling functions"

* tag '5.3-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module number
  cifs: replace various strncpy with strscpy and similar
  cifs: Use kzfree() to zero out the password
  cifs: set domainName when a domain-key is used in multiuser
alistair/sunxi64-5.4-dsi
Linus Torvalds 2019-08-29 17:51:23 -07:00
parent 4a64489cf8 36e337744c
commit 2653810049
7 changed files with 135 additions and 147 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/cifs/cifsfs.h
View File

@ -152,5 +152,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
extern const struct export_operations cifs_export_ops;
#endif /* CONFIG_CIFS_NFSD_EXPORT */
#define CIFS_VERSION "2.21"
#define CIFS_VERSION "2.22"
#endif /* _CIFSFS_H */

1
fs/cifs/cifsproto.h
View File

@ -579,6 +579,7 @@ extern void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page,
unsigned int *len, unsigned int *offset);
void extract_unc_hostname(const char *unc, const char **h, size_t *len);
int copy_path_name(char *dst, const char *src);
#ifdef CONFIG_CIFS_DFS_UPCALL
static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses,

197
fs/cifs/cifssmb.c
View File

@ -942,10 +942,8 @@ PsxDelete:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB add path length overrun check */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fileName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, fileName);
}
params = 6 + name_len;
@ -1015,10 +1013,8 @@ DelFileRetry:
remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve check for buffer overruns BB */
name_len = strnlen(name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->fileName, name, name_len);
} else {
name_len = copy_path_name(pSMB->fileName, name);
}
pSMB->SearchAttributes =
cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM);
@ -1062,10 +1058,8 @@ RmDirRetry:
remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve check for buffer overruns BB */
name_len = strnlen(name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->DirName, name, name_len);
} else {
name_len = copy_path_name(pSMB->DirName, name);
}
pSMB->BufferFormat = 0x04;
@ -1107,10 +1101,8 @@ MkDirRetry:
remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve check for buffer overruns BB */
name_len = strnlen(name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->DirName, name, name_len);
} else {
name_len = copy_path_name(pSMB->DirName, name);
}
pSMB->BufferFormat = 0x04;
@ -1157,10 +1149,8 @@ PsxCreat:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, name, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, name);
}
params = 6 + name_len;
@ -1324,11 +1314,9 @@ OldOpenRetry:
fileName, PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve check for buffer overruns BB */
} else {
count = 0; /* no pad */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->fileName, fileName, name_len);
name_len = copy_path_name(pSMB->fileName, fileName);
}
if (*pOplock & REQ_OPLOCK)
pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK);
@ -1442,11 +1430,8 @@ openRetry:
/* BB improve check for buffer overruns BB */
/* no pad */
count = 0;
name_len = strnlen(path, PATH_MAX);
/* trailing null */
name_len++;
name_len = copy_path_name(req->fileName, path);
req->NameLength = cpu_to_le16(name_len);
strncpy(req->fileName, path, name_len);
}
if (*oplock & REQ_OPLOCK)
@ -2812,15 +2797,10 @@ renameRetry:
remap);
name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
name_len2 *= 2; /* convert to bytes */
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(from_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->OldFileName, from_name, name_len);
name_len2 = strnlen(to_name, PATH_MAX);
name_len2++; /* trailing null */
} else {
name_len = copy_path_name(pSMB->OldFileName, from_name);
name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, to_name);
pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2);
name_len2++; /* trailing null */
name_len2++; /* signature byte */
}
@ -2962,15 +2942,10 @@ copyRetry:
toName, PATH_MAX, nls_codepage, remap);
name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
name_len2 *= 2; /* convert to bytes */
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fromName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->OldFileName, fromName, name_len);
name_len2 = strnlen(toName, PATH_MAX);
name_len2++; /* trailing null */
} else {
name_len = copy_path_name(pSMB->OldFileName, fromName);
pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
name_len2++; /* trailing null */
name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, toName);
name_len2++; /* signature byte */
}
@ -3021,10 +2996,8 @@ createSymLinkRetry:
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fromName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fromName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, fromName);
}
params = 6 + name_len;
pSMB->MaxSetupCount = 0;
@ -3044,10 +3017,8 @@ createSymLinkRetry:
PATH_MAX, nls_codepage, remap);
name_len_target++; /* trailing null */
name_len_target *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len_target = strnlen(toName, PATH_MAX);
name_len_target++; /* trailing null */
strncpy(data_offset, toName, name_len_target);
} else {
name_len_target = copy_path_name(data_offset, toName);
}
pSMB->MaxParameterCount = cpu_to_le16(2);
@ -3109,10 +3080,8 @@ createHardLinkRetry:
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(toName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, toName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, toName);
}
params = 6 + name_len;
pSMB->MaxSetupCount = 0;
@ -3131,10 +3100,8 @@ createHardLinkRetry:
PATH_MAX, nls_codepage, remap);
name_len_target++; /* trailing null */
name_len_target *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len_target = strnlen(fromName, PATH_MAX);
name_len_target++; /* trailing null */
strncpy(data_offset, fromName, name_len_target);
} else {
name_len_target = copy_path_name(data_offset, fromName);
}
pSMB->MaxParameterCount = cpu_to_le16(2);
@ -3213,15 +3180,10 @@ winCreateHardLinkRetry:
remap);
name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
name_len2 *= 2; /* convert to bytes */
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(from_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->OldFileName, from_name, name_len);
name_len2 = strnlen(to_name, PATH_MAX);
name_len2++; /* trailing null */
} else {
name_len = copy_path_name(pSMB->OldFileName, from_name);
pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2);
name_len2++; /* trailing null */
name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, to_name);
name_len2++; /* signature byte */
}
@ -3271,10 +3233,8 @@ querySymLinkRetry:
remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(searchName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, searchName);
}
params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
@ -3691,10 +3651,8 @@ queryAclRetry:
name_len *= 2;
pSMB->FileName[name_len] = 0;
pSMB->FileName[name_len+1] = 0;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(searchName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, searchName);
}
params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
@ -3776,10 +3734,8 @@ setAclRetry:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fileName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, fileName);
}
params = 6 + name_len;
pSMB->MaxParameterCount = cpu_to_le16(2);
@ -4184,9 +4140,7 @@ QInfRetry:
name_len++; /* trailing null */
name_len *= 2;
} else {
name_len = strnlen(search_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, search_name, name_len);
name_len = copy_path_name(pSMB->FileName, search_name);
}
pSMB->BufferFormat = 0x04;
name_len++; /* account for buffer type byte */
@ -4321,10 +4275,8 @@ QPathInfoRetry:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(search_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, search_name, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, search_name);
}
params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
@ -4490,10 +4442,8 @@ UnixQPathInfoRetry:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(searchName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, searchName);
}
params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
@ -4593,17 +4543,16 @@ findFirstRetry:
pSMB->FileName[name_len+1] = 0;
name_len += 2;
}
} else { /* BB add check for overrun of SMB buf BB */
name_len = strnlen(searchName, PATH_MAX);
/* BB fix here and in unicode clause above ie
if (name_len > buffersize-header)
free buffer exit; BB */
strncpy(pSMB->FileName, searchName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, searchName);
if (msearch) {
pSMB->FileName[name_len] = CIFS_DIR_SEP(cifs_sb);
pSMB->FileName[name_len+1] = '*';
pSMB->FileName[name_len+2] = 0;
name_len += 3;
if (WARN_ON_ONCE(name_len > PATH_MAX-2))
name_len = PATH_MAX-2;
/* overwrite nul byte */
pSMB->FileName[name_len-1] = CIFS_DIR_SEP(cifs_sb);
pSMB->FileName[name_len] = '*';
pSMB->FileName[name_len+1] = 0;
name_len += 2;
}
}
@ -4898,10 +4847,8 @@ GetInodeNumberRetry:
remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(search_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, search_name, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, search_name);
}
params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
@ -5008,9 +4955,7 @@ getDFSRetry:
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(search_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->RequestFileName, search_name, name_len);
name_len = copy_path_name(pSMB->RequestFileName, search_name);
}
if (ses->server->sign)
@ -5663,10 +5608,8 @@ SetEOFRetry:
PATH_MAX, cifs_sb->local_nls, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(file_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, file_name, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, file_name);
}
params = 6 + name_len;
data_count = sizeof(struct file_end_of_file_info);
@ -5959,10 +5902,8 @@ SetTimesRetry:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fileName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, fileName);
}
params = 6 + name_len;
@ -6040,10 +5981,8 @@ SetAttrLgcyRetry:
PATH_MAX, nls_codepage);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->fileName, fileName, name_len);
} else {
name_len = copy_path_name(pSMB->fileName, fileName);
}
pSMB->attr = cpu_to_le16(dos_attrs);
pSMB->BufferFormat = 0x04;
@ -6203,10 +6142,8 @@ setPermsRetry:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(file_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, file_name, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, file_name);
}
params = 6 + name_len;
@ -6298,10 +6235,8 @@ QAllEAsRetry:
PATH_MAX, nls_codepage, remap);
list_len++; /* trailing null */
list_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
list_len = strnlen(searchName, PATH_MAX);
list_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, list_len);
} else {
list_len = copy_path_name(pSMB->FileName, searchName);
}
params = 2 /* level */ + 4 /* reserved */ + list_len /* includes NUL */;
@ -6480,10 +6415,8 @@ SetEARetry:
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fileName, name_len);
} else {
name_len = copy_path_name(pSMB->FileName, fileName);
}
params = 6 + name_len;

29
fs/cifs/connect.c
View File

@ -2981,6 +2981,7 @@ static int
cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
{
int rc = 0;
int is_domain = 0;
const char *delim, *payload;
char *desc;
ssize_t len;
@ -3028,6 +3029,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
rc = PTR_ERR(key);
goto out_err;
}
is_domain = 1;
}
down_read(&key->sem);
@ -3085,6 +3087,26 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
goto out_key_put;
}
/*
* If we have a domain key then we must set the domainName in the
* for the request.
*/
if (is_domain && ses->domainName) {
vol->domainname = kstrndup(ses->domainName,
strlen(ses->domainName),
GFP_KERNEL);
if (!vol->domainname) {
cifs_dbg(FYI, "Unable to allocate %zd bytes for "
"domain\n", len);
rc = -ENOMEM;
kfree(vol->username);
vol->username = NULL;
kzfree(vol->password);
vol->password = NULL;
goto out_key_put;
}
}
out_key_put:
up_read(&key->sem);
key_put(key);
@ -4209,16 +4231,19 @@ build_unc_path_to_root(const struct smb_vol *vol,
strlen(vol->prepath) + 1 : 0;
unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
if (unc_len > MAX_TREE_SIZE)
return ERR_PTR(-EINVAL);
full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
if (full_path == NULL)
return ERR_PTR(-ENOMEM);
strncpy(full_path, vol->UNC, unc_len);
memcpy(full_path, vol->UNC, unc_len);
pos = full_path + unc_len;
if (pplen) {
*pos = CIFS_DIR_SEP(cifs_sb);
strncpy(pos + 1, vol->prepath, pplen);
memcpy(pos + 1, vol->prepath, pplen);
pos += pplen;
}

5
fs/cifs/dir.c
View File

@ -69,11 +69,10 @@ cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
return full_path;
if (dfsplen)
strncpy(full_path, tcon->treeName, dfsplen);
memcpy(full_path, tcon->treeName, dfsplen);
full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb);
strncpy(full_path + dfsplen + 1, vol->prepath, pplen);
memcpy(full_path + dfsplen + 1, vol->prepath, pplen);
convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
full_path[dfsplen + pplen] = 0; /* add trailing null */
return full_path;
}

22
fs/cifs/misc.c
View File

@ -1011,3 +1011,25 @@ void extract_unc_hostname(const char *unc, const char **h, size_t *len)
*h = unc;
*len = end - unc;
}
/**
* copy_path_name - copy src path to dst, possibly truncating
*
* returns number of bytes written (including trailing nul)
*/
int copy_path_name(char *dst, const char *src)
{
int name_len;
/*
* PATH_MAX includes nul, so if strlen(src) >= PATH_MAX it
* will truncate and strlen(dst) will be PATH_MAX-1
*/
name_len = strscpy(dst, src, PATH_MAX);
if (WARN_ON_ONCE(name_len < 0))
name_len = PATH_MAX-1;
/* we count the trailing nul */
name_len++;
return name_len;
}

26
fs/cifs/sess.c
View File

@ -159,13 +159,16 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
const struct nls_table *nls_cp)
{
char *bcc_ptr = *pbcc_area;
int len;
/* copy user */
/* BB what about null user mounts - check that we do this BB */
/* copy user */
if (ses->user_name != NULL) {
strncpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN);
bcc_ptr += strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
len = strscpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN);
if (WARN_ON_ONCE(len < 0))
len = CIFS_MAX_USERNAME_LEN - 1;
bcc_ptr += len;
}
/* else null user mount */
*bcc_ptr = 0;
@ -173,8 +176,10 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
/* copy domain */
if (ses->domainName != NULL) {
strncpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
bcc_ptr += strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
len = strscpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
if (WARN_ON_ONCE(len < 0))
len = CIFS_MAX_DOMAINNAME_LEN - 1;
bcc_ptr += len;
} /* else we will send a null domain name
so the server will default to its own domain */
*bcc_ptr = 0;
@ -242,9 +247,10 @@ static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
kfree(ses->serverOS);
ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
ses->serverOS = kmalloc(len + 1, GFP_KERNEL);
if (ses->serverOS) {
strncpy(ses->serverOS, bcc_ptr, len);
memcpy(ses->serverOS, bcc_ptr, len);
ses->serverOS[len] = 0;
if (strncmp(ses->serverOS, "OS/2", 4) == 0)
cifs_dbg(FYI, "OS/2 server\n");
}
@ -258,9 +264,11 @@ static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
kfree(ses->serverNOS);
ses->serverNOS = kzalloc(len + 1, GFP_KERNEL);
if (ses->serverNOS)
strncpy(ses->serverNOS, bcc_ptr, len);
ses->serverNOS = kmalloc(len + 1, GFP_KERNEL);
if (ses->serverNOS) {
memcpy(ses->serverNOS, bcc_ptr, len);
ses->serverNOS[len] = 0;
}
bcc_ptr += len + 1;
bleft -= len + 1;