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ksmbd: fix passing freed memory 'aux_payload_buf'

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[ Upstream commit 59d8d24f4610333560cf2e8fe3f44cafe30322eb ]

The patch e2b76ab8b5c9: "ksmbd: add support for read compound" leads
to the following Smatch static checker warning:

  fs/smb/server/smb2pdu.c:6329 smb2_read()
        warn: passing freed memory 'aux_payload_buf'

It doesn't matter that we're passing a freed variable because nbytes is
zero. This patch set "aux_payload_buf = NULL" to make smatch silence.

Fixes: e2b76ab8b5c9 ("ksmbd: add support for read compound")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Namjae Jeon 2023-12-31 16:13:01 +09:00 • committed by Greg Kroah-Hartman
parent b4b3fd1a95
commit e523a26c05
1 changed files with 1 additions and 1 deletions
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2
fs/smb/server/smb2pdu.c
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@ -6312,7 +6312,7 @@ int smb2_read(struct ksmbd_work *work)
aux_payload_buf,
nbytes);
kvfree(aux_payload_buf);
aux_payload_buf = NULL;
nbytes = 0;
if (remain_bytes < 0) {
err = (int)remain_bytes;