Messages in this thread Patch in this message | | | From | Hangyu Hua <> | Subject | [PATCH] net: 9p: fix possible memory leak in p9_check_errors() | Date | Thu, 26 Oct 2023 17:23:51 +0800 |
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When p9pdu_readf is called with "s?d" attribute, it allocates a pointer that will store a string. But when p9pdu_readf() fails while handling "d" then this pointer will not be freed in p9_check_errors.
Fixes: ca41bb3e21d7 ("[net/9p] Handle Zero Copy TREAD/RERROR case in !dotl case.") Signed-off-by: Hangyu Hua <hbh25y@gmail.com> --- net/9p/client.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/9p/client.c b/net/9p/client.c index 86bbc7147fc1..6c7cd765b714 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -540,12 +540,15 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) return 0; if (!p9_is_proto_dotl(c)) { - char *ename; + char *ename = NULL; err = p9pdu_readf(&req->rc, c->proto_version, "s?d", &ename, &ecode); - if (err) + if (err) { + if (ename != NULL) + kfree(ename); goto out_err; + } if (p9_is_proto_dotu(c) && ecode < 512) err = -ecode; -- 2.34.1
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