The data offset for the SMB3.1.1 POSIX create context will always be
8-byte aligned so having the check 'noff + nlen >= doff' in
smb2_parse_contexts() is wrong as it will lead to -EINVAL because noff
+ nlen == doff.
Fix the sanity check to correctly handle aligned create context data.
Fixes: af1689a9b770 ("smb: client: fix potential OOBs in smb2_parse_contexts()")
Signed-off-by: Paulo Alcantara <pc@xxxxxxxxxxxxx>
---
fs/smb/client/smb2pdu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index 44abd4deb9eb..288199f0b987 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -2308,7 +2308,7 @@ int smb2_parse_contexts(struct TCP_Server_Info *server,
noff = le16_to_cpu(cc->NameOffset);
nlen = le16_to_cpu(cc->NameLength);
- if (noff + nlen >= doff)
+ if (noff + nlen > doff)
return -EINVAL;
name = (char *)cc + noff;
--
2.43.0
