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net: 9p: fix refcount leak in p9_read_work() error handling

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p9_req_put need to be called when m->rreq->rc.sdata is NULL to avoid
temporary refcount leak.

Link: https://lkml.kernel.org/r/20220712104438.30800-1-hbh25y@gmail.com
Fixes: 728356dede ("9p: Add refcount to p9_req_t")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
[Dominique: commit wording adjustments, p9_req_put argument fixes for rebase]
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
This commit is contained in:
Hangyu Hua 2022-07-13 09:55:11 +09:00 committed by Dominique Martinet
parent 67dd8e445e
commit 4ac7573e1f
1 changed files with 1 additions and 0 deletions
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net/9p/trans_fd.c
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@ -343,6 +343,7 @@ static void p9_read_work(struct work_struct *work)
p9_debug(P9_DEBUG_ERROR,
"No recv fcall for tag %d (req %p), disconnecting!\n",
m->rc.tag, m->rreq);
p9_req_put(m->client, m->rreq);
m->rreq = NULL;
err = -EIO;
goto error;