diff options
| author | Steve French <sfrench@us.ibm.com> | 2007-09-15 03:01:17 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2007-09-15 03:01:17 +0000 |
| commit | 88f370a688e765de9755a343702ca04e6817e5f5 (patch) | |
| tree | 82ad179c2310cf60c8aa83c50e221f363b51d8fe | |
| parent | 638b250766272fcaaa0f7ed2776f58f4ac701914 (diff) | |
| download | linux-88f370a688e765de9755a343702ca04e6817e5f5.tar.bz2 | |
[CIFS] Fix potential NULL pointer usage if kzalloc fails
Potential problem was noticed by Cyrill Gorcunov
CC: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
| -rw-r--r-- | fs/cifs/cifs_debug.c | 16 | ||||
| -rw-r--r-- | fs/cifs/connect.c | 13 |
2 files changed, 17 insertions, 12 deletions
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index 1bf8cf522ad6..0356694b5cd0 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -209,13 +209,15 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset, i++; tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList); dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); - length = - sprintf(buf, - "\n%d) %s Uses: %d Type: %s DevInfo: 0x%x " - "Attributes: 0x%x\nPathComponentMax: %d Status: %d", - i, tcon->treeName, - atomic_read(&tcon->useCount), - tcon->nativeFileSystem, + length = sprintf(buf, "\n%d) %s Uses: %d ", i, + tcon->treeName, atomic_read(&tcon->useCount)); + buf += length; + if (tcon->nativeFileSystem) { + length = sprintf("Type: %s ", tcon->nativeFileSystem); + buf += length; + } + length = sprintf(buf, "DevInfo: 0x%x Attributes: 0x%x" + "\nPathComponentMax: %d Status: %d", le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), le32_to_cpu(tcon->fsAttrInfo.Attributes), le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index a83684d8eb5a..5f2ec1946776 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -3386,9 +3386,11 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, kfree(tcon->nativeFileSystem); tcon->nativeFileSystem = kzalloc(length + 2, GFP_KERNEL); - cifs_strfromUCS_le(tcon->nativeFileSystem, - (__le16 *) bcc_ptr, - length, nls_codepage); + if (tcon->nativeFileSystem) + cifs_strfromUCS_le( + tcon->nativeFileSystem, + (__le16 *) bcc_ptr, + length, nls_codepage); bcc_ptr += 2 * length; bcc_ptr[0] = 0; /* null terminate the string */ bcc_ptr[1] = 0; @@ -3403,8 +3405,9 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, kfree(tcon->nativeFileSystem); tcon->nativeFileSystem = kzalloc(length + 1, GFP_KERNEL); - strncpy(tcon->nativeFileSystem, bcc_ptr, - length); + if (tcon->nativeFileSystem) + strncpy(tcon->nativeFileSystem, bcc_ptr, + length); } /* else do not bother copying these information fields*/ } |