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authorPavel Shilovsky <pshilovsky@samba.org>2013-07-09 17:44:56 +0200
committerSteve French <smfrench@gmail.com>2013-07-10 20:08:39 +0200
commitfd55439638a27e34d87b91d618c0ba6b42302940 (patch)
tree3b448d011f80e69ce1954d7e48519eea57c71185
parent[CIFS] use sensible file nlink values if unprovided (diff)
downloadlinux-fd55439638a27e34d87b91d618c0ba6b42302940.tar.xz
linux-fd55439638a27e34d87b91d618c0ba6b42302940.zip
CIFS: Fix lease context buffer parsing
to prevent missing RqLs context if it's not the first one. Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steven French <steven@steven-GA-970A-DS3.(none)>
-rw-r--r--fs/cifs/smb2pdu.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 2b312e4eeaa6..19fafeb767fa 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -853,23 +853,24 @@ parse_lease_state(struct smb2_create_rsp *rsp)
char *data_offset;
struct create_lease *lc;
bool found = false;
+ unsigned int next = 0;
+ char *name;
- data_offset = (char *)rsp;
- data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset);
+ data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
lc = (struct create_lease *)data_offset;
do {
- char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc;
+ lc = (struct create_lease *)((char *)lc + next);
+ name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc;
if (le16_to_cpu(lc->ccontext.NameLength) != 4 ||
strncmp(name, "RqLs", 4)) {
- lc = (struct create_lease *)((char *)lc
- + le32_to_cpu(lc->ccontext.Next));
+ next = le32_to_cpu(lc->ccontext.Next);
continue;
}
if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
return SMB2_OPLOCK_LEVEL_NOCHANGE;
found = true;
break;
- } while (le32_to_cpu(lc->ccontext.Next) != 0);
+ } while (next != 0);
if (!found)
return 0;