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octeontx2-af: Fix possible buffer overflow

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[ Upstream commit ad31c629ca3c87f6d557488c1f9faaebfbcd203c ]

A loop in rvu_mbox_handler_nix_bandprof_free() contains
a break if (idx == MAX_BANDPROF_PER_PFFUNC),
but if idx may reach MAX_BANDPROF_PER_PFFUNC
buffer '(*req->prof_idx)[layer]' overflow happens before that check.

The patch moves the break to the
beginning of the loop.

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

Fixes: e8e095b3b3 ("octeontx2-af: cn10k: Bandwidth profiles config support").
Signed-off-by: Elena Salomatkina <elena.salomatkina.cmc@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Subbaraya Sundeep <sbhatta@marvell.com>
Link: https://lore.kernel.org/r/20231124210802.109763-1-elena.salomatkina.cmc@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Elena Salomatkina 2023-11-25 00:08:02 +03:00 committed by Greg Kroah-Hartman
parent c3e974e9c4
commit 334e6378c2
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
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@ -5236,6 +5236,8 @@ int rvu_mbox_handler_nix_bandprof_free(struct rvu *rvu,
ipolicer = &nix_hw->ipolicer[layer];
for (idx = 0; idx < req->prof_count[layer]; idx++) {
if (idx == MAX_BANDPROF_PER_PFFUNC)
break;
prof_idx = req->prof_idx[layer][idx];
if (prof_idx >= ipolicer->band_prof.max ||
ipolicer->pfvf_map[prof_idx] != pcifunc)
@ -5249,8 +5251,6 @@ int rvu_mbox_handler_nix_bandprof_free(struct rvu *rvu,
ipolicer->pfvf_map[prof_idx] = 0x00;
ipolicer->match_id[prof_idx] = 0;
rvu_free_rsrc(&ipolicer->band_prof, prof_idx);
if (idx == MAX_BANDPROF_PER_PFFUNC)
break;
}
}
mutex_unlock(&rvu->rsrc_lock);