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chelsio/chtls: fix memory leaks caused by a race

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[ Upstream commit 8080b462b6aa856ae05ea010441a702599e579f2 ]

race between user context and softirq causing memleak,
consider the call sequence scenario

chtls_setkey()         //user context
chtls_peer_close()
chtls_abort_req_rss()
chtls_setkey()         //user context

work request skb queued in chtls_setkey() won't be freed
because resources are already cleaned for this connection,
fix it by not queuing work request while socket is closing.

v1->v2:
- fix W=1 warning.

v2->v3:
- separate it out from another memleak fix.

Fixes: cc35c88ae4 ("crypto : chtls - CPL handler definition")
Signed-off-by: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
Link: https://lore.kernel.org/r/20201102173650.24754-1-vinay.yadav@chelsio.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vinay Kumar Yadav 2020-11-02 23:06:51 +05:30 • committed by Greg Kroah-Hartman
commit 14d755a481
1 changed files with 3 additions and 0 deletions
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3
drivers/crypto/chelsio/chtls/chtls_hw.c
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@ -357,6 +357,9 @@ int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 optname)
if (ret)
goto out_notcb;
if (unlikely(csk_flag(sk, CSK_ABORT_SHUTDOWN)))
goto out_notcb;
set_wr_txq(skb, CPL_PRIORITY_DATA, csk->tlshws.txqid);
csk->wr_credits -= DIV_ROUND_UP(len, 16);
csk->wr_unacked += DIV_ROUND_UP(len, 16);