From: Colin Ian King <colin.i.king@gmail.com>
To: Sunil Goutham <sgoutham@marvell.com>,
Linu Cherian <lcherian@marvell.com>,
Geetha sowjanya <gakula@marvell.com>,
Jerin Jacob <jerinj@marvell.com>, hariprasad <hkelam@marvell.com>,
Subbaraya Sundeep <sbhatta@marvell.com>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Naveen Mamindlapalli <naveenm@marvell.com>,
netdev@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH][next] octeontx2-af: Fix potential integer overflow on shift of a int
Date: Thu, 10 Oct 2024 14:11:22 +0100 [thread overview]
Message-ID: <20241010131122.751744-1-colin.i.king@gmail.com> (raw)
The left shift of int 32 bit integer constant 1 is evaluated using 32 bit
arithmetic and then assigned to a 64 bit unsigned integer. In the case
where the shift is 32 or more this can lead to an overflow. Avoid this
by shifting using the BIT_ULL macro instead.
Fixes: 019aba04f08c ("octeontx2-af: Modify SMQ flush sequence to drop packets")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 82832a24fbd8..28f917a37acf 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -2411,7 +2411,7 @@ static int nix_smq_flush(struct rvu *rvu, int blkaddr,
NIX_AF_TL3_TL2X_LINKX_CFG(tl2_tl3_link_schq, link));
if (!(cfg & BIT_ULL(12)))
continue;
- bmap |= (1 << i);
+ bmap |= BIT_ULL(i);
cfg &= ~BIT_ULL(12);
rvu_write64(rvu, blkaddr,
NIX_AF_TL3_TL2X_LINKX_CFG(tl2_tl3_link_schq, link), cfg);
--
2.39.5
next reply other threads:[~2024-10-10 13:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-10 13:11 Colin Ian King [this message]
2024-10-10 13:49 ` [PATCH][next] octeontx2-af: Fix potential integer overflow on shift of a int Dan Carpenter
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