Commit 6cec2aed authored by Steve French's avatar Steve French Committed by Linus Torvalds

[PATCH] CIFS: CIFSSMBRead was returning an invalid pointer in buf on socket error

Thanks to Adrian Bunk for debugging the problem and to Shaggy for
helping find the solution.

Also added a fix for 64K pages we found in loosely-related testing
Signed-off-by: default avatarDave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent c45ec656
......@@ -1048,13 +1048,14 @@ CIFSSMBRead(const int xid, struct cifsTconInfo *tcon,
cifs_small_buf_release(iov[0].iov_base);
else if(resp_buf_type == CIFS_LARGE_BUFFER)
cifs_buf_release(iov[0].iov_base);
} else /* return buffer to caller to free */ /* BB FIXME how do we tell caller if it is not a large buffer */ {
*buf = iov[0].iov_base;
} else if(resp_buf_type != CIFS_NO_BUFFER) {
/* return buffer to caller to free */
*buf = iov[0].iov_base;
if(resp_buf_type == CIFS_SMALL_BUFFER)
*pbuf_type = CIFS_SMALL_BUFFER;
else if(resp_buf_type == CIFS_LARGE_BUFFER)
*pbuf_type = CIFS_LARGE_BUFFER;
}
} /* else no valid buffer on return - leave as null */
/* Note: On -EAGAIN error only caller can retry on handle based calls
since file handle passed in no longer valid */
......
......@@ -1795,10 +1795,10 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
conjunction with 52K kvec constraint on arch with 4K
page size */
if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
cifs_sb->rsize = PAGE_CACHE_SIZE;
/* Windows ME does this */
cFYI(1,("Attempt to set readsize for mount to less than one page (4096)"));
if(cifs_sb->rsize < 2048) {
cifs_sb->rsize = 2048;
/* Windows ME may prefer this */
cFYI(1,("readsize set to minimum 2048"));
}
cifs_sb->mnt_uid = volume_info.linux_uid;
cifs_sb->mnt_gid = volume_info.linux_gid;
......
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