Patch "RDMA/siw: Fix potential page_array out of range access" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    RDMA/siw: Fix potential page_array out of range access

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rdma-siw-fix-potential-page_array-out-of-range-acces.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit a38dc62b4b7a5dd14177334f0f6a11945b9cb1ad
Author: Daniil Dulov <d.dulov@xxxxxxxxxx>
Date:   Mon Feb 27 01:17:51 2023 -0800

    RDMA/siw: Fix potential page_array out of range access
    
    [ Upstream commit 271bfcfb83a9f77cbae3d6e1a16e3c14132922f0 ]
    
    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: b9be6f18cf9e ("rdma/siw: transmit path")
    Signed-off-by: Daniil Dulov <d.dulov@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230227091751.589612-1-d.dulov@xxxxxxxxxx
    Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index 05052b49107f2..6bb9e9e81ff4c 100644
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -558,7 +558,7 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx, struct socket *s)
 			data_len -= plen;
 			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_unmap_pages(iov, kmap_mask, seg-1);
 				wqe->processed -= c_tx->bytes_unsent;



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