* [PATCH] ksmbd: Fix an error handling path in 'smb2_sess_setup()'
@ 2021-11-07 15:22 Christophe JAILLET
2021-11-07 20:33 ` Namjae Jeon
0 siblings, 1 reply; 2+ messages in thread
From: Christophe JAILLET @ 2021-11-07 15:22 UTC (permalink / raw)
To: linkinjeon, senozhatsky, sfrench, hyc.lee, mmakassikis
Cc: linux-cifs, linux-kernel, kernel-janitors, Christophe JAILLET
All the error handling paths of 'smb2_sess_setup()' end to 'out_err'.
All but the new error handling path added by the commit given in the Fixes
tag below.
Fix this error handling path and branch to 'out_err' as well.
Fixes: 0d994cd482ee ("ksmbd: add buffer validation in session setup")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
fs/ksmbd/smb2pdu.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index ba68a27cabf8..bb0d1b155b34 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -1698,8 +1698,10 @@ int smb2_sess_setup(struct ksmbd_work *work)
negblob_off = le16_to_cpu(req->SecurityBufferOffset);
negblob_len = le16_to_cpu(req->SecurityBufferLength);
if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
- negblob_len < offsetof(struct negotiate_message, NegotiateFlags))
- return -EINVAL;
+ negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
+ rc = -EINVAL;
+ goto out_err;
+ }
negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
negblob_off);
--
2.30.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ksmbd: Fix an error handling path in 'smb2_sess_setup()'
2021-11-07 15:22 [PATCH] ksmbd: Fix an error handling path in 'smb2_sess_setup()' Christophe JAILLET
@ 2021-11-07 20:33 ` Namjae Jeon
0 siblings, 0 replies; 2+ messages in thread
From: Namjae Jeon @ 2021-11-07 20:33 UTC (permalink / raw)
To: Christophe JAILLET
Cc: senozhatsky, sfrench, hyc.lee, mmakassikis, linux-cifs,
linux-kernel, kernel-janitors, stable
2021-11-08 0:22 GMT+09:00, Christophe JAILLET <christophe.jaillet@wanadoo.fr>:
> All the error handling paths of 'smb2_sess_setup()' end to 'out_err'.
>
> All but the new error handling path added by the commit given in the Fixes
> tag below.
>
> Fix this error handling path and branch to 'out_err' as well.
>
> Fixes: 0d994cd482ee ("ksmbd: add buffer validation in session setup")
Cc: stable@vger.kernel.org # v5.15
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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