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cifs: don't leak -ENOMEM in smb2_open_file()

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[ Upstream commit f60ffa662d ]

A NULL error response might be a valid case where smb2_reconnect()
failed to reconnect the session and tcon due to a disconnected server
prior to issuing the I/O operation, so don't leak -ENOMEM to userspace
on such occasions.

Fixes: 76894f3e2f ("cifs: improve symlink handling for smb2+")
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Paulo Alcantara 2022-12-19 10:21:50 -03:00 committed by Greg Kroah-Hartman
parent 1c12816be5
commit 1022196307
1 changed files with 2 additions and 2 deletions
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4
fs/cifs/smb2file.c
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@ -122,8 +122,8 @@ int smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32
struct smb2_hdr *hdr = err_iov.iov_base;
if (unlikely(!err_iov.iov_base || err_buftype == CIFS_NO_BUFFER))
rc = -ENOMEM;
else if (hdr->Status == STATUS_STOPPED_ON_SYMLINK) {
goto out;
if (hdr->Status == STATUS_STOPPED_ON_SYMLINK) {
rc = smb2_parse_symlink_response(oparms->cifs_sb, &err_iov,
&data->symlink_target);
if (!rc) {