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| author | Steve French <smfrench@austin.rr.com> | 2006-02-14 22:30:52 -0600 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-14 19:46:25 -0800 |
| commit | 93544cc6486bea12e127ed58ca33477bb6ceafe6 (patch) | |
| tree | 94eda2f741603fbf350bb8849b3291920d991d52 /fs | |
| parent | 10ee39fe3ff618d274e1cd0f6abbc2917b736bfd (diff) | |
| download | lwn-93544cc6486bea12e127ed58ca33477bb6ceafe6.tar.gz lwn-93544cc6486bea12e127ed58ca33477bb6ceafe6.zip | |
[PATCH] CIFS: fix cifs_user_read oops when null SMB response on forcedirectio mount
This patch fixes an oops reported by Adrian Bunk in cifs_user_read when a null
read response is returned on a forcedirectio mount.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/file.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index d17c97d07c80..675bd2568297 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1442,13 +1442,15 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data, &bytes_read, &smb_read_data, &buf_type); pSMBr = (struct smb_com_read_rsp *)smb_read_data; - if (copy_to_user(current_offset, - smb_read_data + 4 /* RFC1001 hdr */ - + le16_to_cpu(pSMBr->DataOffset), - bytes_read)) { - rc = -EFAULT; - } if (smb_read_data) { + if (copy_to_user(current_offset, + smb_read_data + + 4 /* RFC1001 length field */ + + le16_to_cpu(pSMBr->DataOffset), + bytes_read)) { + rc = -EFAULT; + } + if(buf_type == CIFS_SMALL_BUFFER) cifs_small_buf_release(smb_read_data); else if(buf_type == CIFS_LARGE_BUFFER) |