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authorSteve French <smfrench@austin.rr.com>2005-04-28 22:41:08 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-28 22:41:08 -0700
commit433dc24f24b409fb130f638aa85470a0eb666206 (patch)
treec64f3c478297b38361f91fea0609fb4fbedaffaf /fs/cifs
parent099a58f681ed951434574ec39bdfe87055bafe73 (diff)
[PATCH] cifs: remove cifs_kcalloc and check for NULL return on kcalloc in session initialization
Suggested by: Adrian Bunk and Dave Miller Signed-off-by: Steve French (sfrench@us.ibm.com) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifs_debug.c15
-rw-r--r--fs/cifs/connect.c124
2 files changed, 80 insertions, 59 deletions
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index bff2ec6e054..4061e43471c 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -89,14 +89,21 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
list_for_each(tmp, &GlobalSMBSessionList) {
i++;
ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
- length =
- sprintf(buf,
- "\n%d) Name: %s Domain: %s Mounts: %d ServerOS: %s \n\tServerNOS: %s\tCapabilities: 0x%x\n\tSMB session status: %d\t",
+ if((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
+ (ses->serverNOS == NULL)) {
+ buf += sprintf("\nentry for %s not fully displayed\n\t",
+ ses->serverName);
+
+ } else {
+ length =
+ sprintf(buf,
+ "\n%d) Name: %s Domain: %s Mounts: %d ServerOS: %s \n\tServerNOS: %s\tCapabilities: 0x%x\n\tSMB session status: %d\t",
i, ses->serverName, ses->serverDomain,
atomic_read(&ses->inUse),
ses->serverOS, ses->serverNOS,
ses->capabilities,ses->status);
- buf += length;
+ buf += length;
+ }
if(ses->server) {
buf += sprintf(buf, "TCP status: %d\n\tLocal Users To Server: %d SecMode: 0x%x Req Active: %d",
ses->server->tcpStatus,
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c999583d11b..8a8aa785e7b 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -505,16 +505,6 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
return 0;
}
-static void *
-cifs_kcalloc(size_t size, unsigned int __nocast type)
-{
- void *addr;
- addr = kmalloc(size, type);
- if (addr)
- memset(addr, 0, size);
- return addr;
-}
-
static int
cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
{
@@ -632,7 +622,11 @@ cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
/* go from value to value + temp_len condensing
double commas to singles. Note that this ends up
allocating a few bytes too many, which is ok */
- vol->password = cifs_kcalloc(temp_len, GFP_KERNEL);
+ vol->password = kcalloc(1, temp_len, GFP_KERNEL);
+ if(vol->password == NULL) {
+ printk("CIFS: no memory for pass\n");
+ return 1;
+ }
for(i=0,j=0;i<temp_len;i++,j++) {
vol->password[j] = value[i];
if(value[i] == separator[0] && value[i+1] == separator[0]) {
@@ -642,7 +636,11 @@ cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
}
vol->password[j] = 0;
} else {
- vol->password = cifs_kcalloc(temp_len + 1, GFP_KERNEL);
+ vol->password = kcalloc(1, temp_len + 1, GFP_KERNEL);
+ if(vol->password == NULL) {
+ printk("CIFS: no memory for pass\n");
+ return 1;
+ }
strcpy(vol->password, value);
}
} else if (strnicmp(data, "ip", 2) == 0) {
@@ -1104,7 +1102,7 @@ ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
sessinit is sent but no second negprot */
struct rfc1002_session_packet * ses_init_buf;
struct smb_hdr * smb_buf;
- ses_init_buf = cifs_kcalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
+ ses_init_buf = kcalloc(1, sizeof(struct rfc1002_session_packet), GFP_KERNEL);
if(ses_init_buf) {
ses_init_buf->trailer.session_req.called_len = 32;
rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
@@ -1751,7 +1749,9 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
/* We look for obvious messed up bcc or strings in response so we do not go off
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
- ses->serverOS = cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
+ ses->serverOS = kcalloc(1, 2 * (len + 1), GFP_KERNEL);
+ if(ses->serverOS == NULL)
+ goto sesssetup_nomem;
cifs_strfromUCS_le(ses->serverOS,
(wchar_t *)bcc_ptr, len,nls_codepage);
bcc_ptr += 2 * (len + 1);
@@ -1761,7 +1761,9 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
if (remaining_words > 0) {
len = UniStrnlen((wchar_t *)bcc_ptr,
remaining_words-1);
- ses->serverNOS =cifs_kcalloc(2 * (len + 1),GFP_KERNEL);
+ ses->serverNOS = kcalloc(1, 2 * (len + 1),GFP_KERNEL);
+ if(ses->serverNOS == NULL)
+ goto sesssetup_nomem;
cifs_strfromUCS_le(ses->serverNOS,
(wchar_t *)bcc_ptr,len,nls_codepage);
bcc_ptr += 2 * (len + 1);
@@ -1774,10 +1776,12 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
}
remaining_words -= len + 1;
if (remaining_words > 0) {
- len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
+ len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
/* last string is not always null terminated (for e.g. for Windows XP & 2000) */
ses->serverDomain =
- cifs_kcalloc(2*(len+1),GFP_KERNEL);
+ kcalloc(1, 2*(len+1),GFP_KERNEL);
+ if(ses->serverDomain == NULL)
+ goto sesssetup_nomem;
cifs_strfromUCS_le(ses->serverDomain,
(wchar_t *)bcc_ptr,len,nls_codepage);
bcc_ptr += 2 * (len + 1);
@@ -1785,21 +1789,25 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
ses->serverDomain[1+(2*len)] = 0;
} /* else no more room so create dummy domain string */
else
- ses->serverDomain =
- cifs_kcalloc(2,
- GFP_KERNEL);
+ ses->serverDomain =
+ kcalloc(1, 2, GFP_KERNEL);
} else { /* no room so create dummy domain and NOS string */
+ /* if these kcallocs fail not much we
+ can do, but better to not fail the
+ sesssetup itself */
ses->serverDomain =
- cifs_kcalloc(2, GFP_KERNEL);
+ kcalloc(1, 2, GFP_KERNEL);
ses->serverNOS =
- cifs_kcalloc(2, GFP_KERNEL);
+ kcalloc(1, 2, GFP_KERNEL);
}
} else { /* ASCII */
len = strnlen(bcc_ptr, 1024);
if (((long) bcc_ptr + len) - (long)
pByteArea(smb_buffer_response)
<= BCC(smb_buffer_response)) {
- ses->serverOS = cifs_kcalloc(len + 1,GFP_KERNEL);
+ ses->serverOS = kcalloc(1, len + 1,GFP_KERNEL);
+ if(ses->serverOS == NULL)
+ goto sesssetup_nomem;
strncpy(ses->serverOS,bcc_ptr, len);
bcc_ptr += len;
@@ -1807,14 +1815,18 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
- ses->serverNOS = cifs_kcalloc(len + 1,GFP_KERNEL);
+ ses->serverNOS = kcalloc(1, len + 1,GFP_KERNEL);
+ if(ses->serverNOS == NULL)
+ goto sesssetup_nomem;
strncpy(ses->serverNOS, bcc_ptr, len);
bcc_ptr += len;
bcc_ptr[0] = 0;
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
- ses->serverDomain = cifs_kcalloc(len + 1,GFP_KERNEL);
+ ses->serverDomain = kcalloc(1, len + 1,GFP_KERNEL);
+ if(ses->serverDomain == NULL)
+ goto sesssetup_nomem;
strncpy(ses->serverDomain, bcc_ptr, len);
bcc_ptr += len;
bcc_ptr[0] = 0;
@@ -1834,7 +1846,9 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
smb_buffer_response->WordCount));
rc = -EIO;
}
-
+sesssetup_nomem: /* do not return an error on nomem for the info strings,
+ since that could make reconnection harder, and
+ reconnection might be needed to free memory */
if (smb_buffer)
cifs_buf_release(smb_buffer);
@@ -2011,7 +2025,7 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
ses->serverOS =
- cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
+ kcalloc(1, 2 * (len + 1), GFP_KERNEL);
cifs_strfromUCS_le(ses->serverOS,
(wchar_t *)
bcc_ptr, len,
@@ -2025,7 +2039,7 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
remaining_words
- 1);
ses->serverNOS =
- cifs_kcalloc(2 * (len + 1),
+ kcalloc(1, 2 * (len + 1),
GFP_KERNEL);
cifs_strfromUCS_le(ses->serverNOS,
(wchar_t *)bcc_ptr,
@@ -2038,7 +2052,7 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
if (remaining_words > 0) {
len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
/* last string is not always null terminated (for e.g. for Windows XP & 2000) */
- ses->serverDomain = cifs_kcalloc(2*(len+1),GFP_KERNEL);
+ ses->serverDomain = kcalloc(1, 2*(len+1),GFP_KERNEL);
cifs_strfromUCS_le(ses->serverDomain,
(wchar_t *)bcc_ptr,
len,
@@ -2049,10 +2063,10 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
} /* else no more room so create dummy domain string */
else
ses->serverDomain =
- cifs_kcalloc(2,GFP_KERNEL);
+ kcalloc(1, 2,GFP_KERNEL);
} else { /* no room so create dummy domain and NOS string */
- ses->serverDomain = cifs_kcalloc(2, GFP_KERNEL);
- ses->serverNOS = cifs_kcalloc(2, GFP_KERNEL);
+ ses->serverDomain = kcalloc(1, 2, GFP_KERNEL);
+ ses->serverNOS = kcalloc(1, 2, GFP_KERNEL);
}
} else { /* ASCII */
@@ -2060,7 +2074,7 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
if (((long) bcc_ptr + len) - (long)
pByteArea(smb_buffer_response)
<= BCC(smb_buffer_response)) {
- ses->serverOS = cifs_kcalloc(len + 1, GFP_KERNEL);
+ ses->serverOS = kcalloc(1, len + 1, GFP_KERNEL);
strncpy(ses->serverOS, bcc_ptr, len);
bcc_ptr += len;
@@ -2068,14 +2082,14 @@ CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
- ses->serverNOS = cifs_kcalloc(len + 1,GFP_KERNEL);
+ ses->serverNOS = kcalloc(1, len + 1,GFP_KERNEL);
strncpy(ses->serverNOS, bcc_ptr, len);
bcc_ptr += len;
bcc_ptr[0] = 0;
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
- ses->serverDomain = cifs_kcalloc(len + 1, GFP_KERNEL);
+ ses->serverDomain = kcalloc(1, len + 1, GFP_KERNEL);
strncpy(ses->serverDomain, bcc_ptr, len);
bcc_ptr += len;
bcc_ptr[0] = 0;
@@ -2325,7 +2339,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
ses->serverOS =
- cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
+ kcalloc(1, 2 * (len + 1), GFP_KERNEL);
cifs_strfromUCS_le(ses->serverOS,
(wchar_t *)
bcc_ptr, len,
@@ -2340,7 +2354,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
remaining_words
- 1);
ses->serverNOS =
- cifs_kcalloc(2 * (len + 1),
+ kcalloc(1, 2 * (len + 1),
GFP_KERNEL);
cifs_strfromUCS_le(ses->
serverNOS,
@@ -2357,7 +2371,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
/* last string is not always null terminated (for e.g. for Windows XP & 2000) */
ses->serverDomain =
- cifs_kcalloc(2 *
+ kcalloc(1, 2 *
(len +
1),
GFP_KERNEL);
@@ -2383,13 +2397,13 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
} /* else no more room so create dummy domain string */
else
ses->serverDomain =
- cifs_kcalloc(2,
+ kcalloc(1, 2,
GFP_KERNEL);
} else { /* no room so create dummy domain and NOS string */
ses->serverDomain =
- cifs_kcalloc(2, GFP_KERNEL);
+ kcalloc(1, 2, GFP_KERNEL);
ses->serverNOS =
- cifs_kcalloc(2, GFP_KERNEL);
+ kcalloc(1, 2, GFP_KERNEL);
}
} else { /* ASCII */
len = strnlen(bcc_ptr, 1024);
@@ -2397,7 +2411,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
pByteArea(smb_buffer_response)
<= BCC(smb_buffer_response)) {
ses->serverOS =
- cifs_kcalloc(len + 1,
+ kcalloc(1, len + 1,
GFP_KERNEL);
strncpy(ses->serverOS,
bcc_ptr, len);
@@ -2408,7 +2422,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
len = strnlen(bcc_ptr, 1024);
ses->serverNOS =
- cifs_kcalloc(len + 1,
+ kcalloc(1, len + 1,
GFP_KERNEL);
strncpy(ses->serverNOS, bcc_ptr, len);
bcc_ptr += len;
@@ -2417,7 +2431,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
len = strnlen(bcc_ptr, 1024);
ses->serverDomain =
- cifs_kcalloc(len + 1,
+ kcalloc(1, len + 1,
GFP_KERNEL);
strncpy(ses->serverDomain, bcc_ptr, len);
bcc_ptr += len;
@@ -2719,7 +2733,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
ses->serverOS =
- cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
+ kcalloc(1, 2 * (len + 1), GFP_KERNEL);
cifs_strfromUCS_le(ses->serverOS,
(wchar_t *)
bcc_ptr, len,
@@ -2734,7 +2748,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
remaining_words
- 1);
ses->serverNOS =
- cifs_kcalloc(2 * (len + 1),
+ kcalloc(1, 2 * (len + 1),
GFP_KERNEL);
cifs_strfromUCS_le(ses->
serverNOS,
@@ -2750,7 +2764,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
/* last string not always null terminated (e.g. for Windows XP & 2000) */
ses->serverDomain =
- cifs_kcalloc(2 *
+ kcalloc(1, 2 *
(len +
1),
GFP_KERNEL);
@@ -2775,17 +2789,17 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
= 0;
} /* else no more room so create dummy domain string */
else
- ses->serverDomain = cifs_kcalloc(2,GFP_KERNEL);
+ ses->serverDomain = kcalloc(1, 2,GFP_KERNEL);
} else { /* no room so create dummy domain and NOS string */
- ses->serverDomain = cifs_kcalloc(2, GFP_KERNEL);
- ses->serverNOS = cifs_kcalloc(2, GFP_KERNEL);
+ ses->serverDomain = kcalloc(1, 2, GFP_KERNEL);
+ ses->serverNOS = kcalloc(1, 2, GFP_KERNEL);
}
} else { /* ASCII */
len = strnlen(bcc_ptr, 1024);
if (((long) bcc_ptr + len) -
(long) pByteArea(smb_buffer_response)
<= BCC(smb_buffer_response)) {
- ses->serverOS = cifs_kcalloc(len + 1,GFP_KERNEL);
+ ses->serverOS = kcalloc(1, len + 1,GFP_KERNEL);
strncpy(ses->serverOS,bcc_ptr, len);
bcc_ptr += len;
@@ -2793,14 +2807,14 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
- ses->serverNOS = cifs_kcalloc(len+1,GFP_KERNEL);
+ ses->serverNOS = kcalloc(1, len+1,GFP_KERNEL);
strncpy(ses->serverNOS, bcc_ptr, len);
bcc_ptr += len;
bcc_ptr[0] = 0;
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
- ses->serverDomain = cifs_kcalloc(len+1,GFP_KERNEL);
+ ses->serverDomain = kcalloc(1, len+1,GFP_KERNEL);
strncpy(ses->serverDomain, bcc_ptr, len);
bcc_ptr += len;
bcc_ptr[0] = 0;
@@ -2912,7 +2926,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
if(tcon->nativeFileSystem)
kfree(tcon->nativeFileSystem);
tcon->nativeFileSystem =
- cifs_kcalloc(length + 2, GFP_KERNEL);
+ kcalloc(1, length + 2, GFP_KERNEL);
cifs_strfromUCS_le(tcon->nativeFileSystem,
(wchar_t *) bcc_ptr,
length, nls_codepage);
@@ -2930,7 +2944,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
if(tcon->nativeFileSystem)
kfree(tcon->nativeFileSystem);
tcon->nativeFileSystem =
- cifs_kcalloc(length + 1, GFP_KERNEL);
+ kcalloc(1, length + 1, GFP_KERNEL);
strncpy(tcon->nativeFileSystem, bcc_ptr,
length);
}