From: Elena Salomatkina Date: Fri, 24 Nov 2023 21:08:02 +0000 (+0300) Subject: octeontx2-af: Fix possible buffer overflow X-Git-Tag: v6.1.68~239 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=334e6378c28c2dd0584259777a76b413aaa25fb1;p=platform%2Fkernel%2Flinux-starfive.git octeontx2-af: Fix possible buffer overflow [ 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: e8e095b3b370 ("octeontx2-af: cn10k: Bandwidth profiles config support"). Signed-off-by: Elena Salomatkina Reviewed-by: Simon Horman Reviewed-by: Subbaraya Sundeep Link: https://lore.kernel.org/r/20231124210802.109763-1-elena.salomatkina.cmc@gmail.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c index 1f3a8cf..7310047 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c @@ -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);