The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From cfe89091644c441a1ade6dae6d2e47b715648615 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Sat, 19 May 2018 02:04:55 -0500
Subject: [PATCH] smb3: fix various xid leaks
Fix a few cases where we were not freeing the xid which led to
active requests being non-zero at unmount time.
Signed-off-by: Steve French <smfrench@xxxxxxxxx>
CC: Stable <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index ceaa358723f0..f0ae47e69cb3 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1637,8 +1637,11 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
oparms.create_options = 0;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
- if (!utf16_path)
- return ERR_PTR(-ENOMEM);
+ if (!utf16_path) {
+ rc = -ENOMEM;
+ free_xid(xid);
+ return ERR_PTR(rc);
+ }
oparms.tcon = tcon;
oparms.desired_access = READ_CONTROL;
@@ -1696,8 +1699,11 @@ set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
access_flags = WRITE_DAC;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
- if (!utf16_path)
- return -ENOMEM;
+ if (!utf16_path) {
+ rc = -ENOMEM;
+ free_xid(xid);
+ return rc;
+ }
oparms.tcon = tcon;
oparms.desired_access = access_flags;
@@ -1757,15 +1763,21 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
/* if file not oplocked can't be sure whether asking to extend size */
if (!CIFS_CACHE_READ(cifsi))
- if (keep_size == false)
- return -EOPNOTSUPP;
+ if (keep_size == false) {
+ rc = -EOPNOTSUPP;
+ free_xid(xid);
+ return rc;
+ }
/*
* Must check if file sparse since fallocate -z (zero range) assumes
* non-sparse allocation
*/
- if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
- return -EOPNOTSUPP;
+ if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
+ rc = -EOPNOTSUPP;
+ free_xid(xid);
+ return rc;
+ }
/*
* need to make sure we are not asked to extend the file since the SMB3
@@ -1774,8 +1786,11 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
* which for a non sparse file would zero the newly extended range
*/
if (keep_size == false)
- if (i_size_read(inode) < offset + len)
- return -EOPNOTSUPP;
+ if (i_size_read(inode) < offset + len) {
+ rc = -EOPNOTSUPP;
+ free_xid(xid);
+ return rc;
+ }
cifs_dbg(FYI, "offset %lld len %lld", offset, len);
@@ -1808,8 +1823,11 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
/* Need to make file sparse, if not already, before freeing range. */
/* Consider adding equivalent for compressed since it could also work */
- if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
- return -EOPNOTSUPP;
+ if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
+ rc = -EOPNOTSUPP;
+ free_xid(xid);
+ return rc;
+ }
cifs_dbg(FYI, "offset %lld len %lld", offset, len);
@@ -1840,8 +1858,10 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
/* if file not oplocked can't be sure whether asking to extend size */
if (!CIFS_CACHE_READ(cifsi))
- if (keep_size == false)
- return -EOPNOTSUPP;
+ if (keep_size == false) {
+ free_xid(xid);
+ return rc;
+ }
/*
* Files are non-sparse by default so falloc may be a no-op
@@ -1850,14 +1870,16 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
*/
if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
if (keep_size == true)
- return 0;
+ rc = 0;
/* check if extending file */
else if (i_size_read(inode) >= off + len)
/* not extending file and already not sparse */
- return 0;
+ rc = 0;
/* BB: in future add else clause to extend file */
else
- return -EOPNOTSUPP;
+ rc = -EOPNOTSUPP;
+ free_xid(xid);
+ return rc;
}
if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
@@ -1869,8 +1891,11 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
* ie potentially making a few extra pages at the beginning
* or end of the file non-sparse via set_sparse is harmless.
*/
- if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
- return -EOPNOTSUPP;
+ if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
+ rc = -EOPNOTSUPP;
+ free_xid(xid);
+ return rc;
+ }
rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
}
