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RDMA/siw: Fix potential page_array out of range access

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[ Upstream commit 271bfcfb83 ]

When seg is equal to MAX_ARRAY, the loop should break, otherwise
it will result in out of range access.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: b9be6f18cf ("rdma/siw: transmit path")
Signed-off-by: Daniil Dulov <d.dulov@aladdin.ru>
Link: https://lore.kernel.org/r/20230227091751.589612-1-d.dulov@aladdin.ru
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniil Dulov
2023-02-27 01:17:51 -08:00
committed by Greg Kroah-Hartman
parent 87e8dc26eb
commit 538f21095d
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/sw/siw/siw_qp_tx.c
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@@ -558,7 +558,7 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx, struct socket *s)
data_len -= plen; data_len -= plen;
fp_off = 0; fp_off = 0;
if (++seg > (int)MAX_ARRAY) { if (++seg >= (int)MAX_ARRAY) {
siw_dbg_qp(tx_qp(c_tx), "to many fragments\n"); siw_dbg_qp(tx_qp(c_tx), "to many fragments\n");
siw_unmap_pages(iov, kmap_mask, seg-1); siw_unmap_pages(iov, kmap_mask, seg-1);
wqe->processed -= c_tx->bytes_unsent; wqe->processed -= c_tx->bytes_unsent;