forked from Minki/linux
xprtrdma: Fix use-after-free in rpcrdma_post_recvs
Dereference wr->next /before/ the memory backing wr has been
released. This issue was found by code inspection. It is not
expected to be a significant problem because it is in an error
path that is almost never executed.
Fixes: 7c8d9e7c88
("xprtrdma: Move Receive posting to ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
parent
10694ac92c
commit
2d0abe36cf
@ -1553,10 +1553,11 @@ rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp)
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rc = ib_post_recv(r_xprt->rx_ia.ri_id->qp, wr,
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(const struct ib_recv_wr **)&bad_wr);
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if (rc) {
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for (wr = bad_wr; wr; wr = wr->next) {
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for (wr = bad_wr; wr;) {
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struct rpcrdma_rep *rep;
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rep = container_of(wr, struct rpcrdma_rep, rr_recv_wr);
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wr = wr->next;
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rpcrdma_recv_buffer_put(rep);
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--count;
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}
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