diff options
| author | Colin Ian King <colin.king@canonical.com> | 2020-11-18 13:05:20 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-20 11:05:16 -0800 |
| commit | 583b273dea75720ce74cc45afeeb96d88246e582 (patch) | |
| tree | 5613ec8fda5f6b1cb6b549b0401803934f94390c | |
| parent | b5fb0b1bbb5021339cfe9e9fe8177a50047545f1 (diff) | |
octeontx2-pf: Fix unintentional sign extension issue
The shifting of the u16 result from ntohs(proto) by 16 bits to the
left will be promoted to a 32 bit signed int and then sign-extended
to a u64. In the event that the top bit of the return from ntohs(proto)
is set then all then all the upper 32 bits of a 64 bit long end up as
also being set because of the sign-extension. Fix this by casting to
a u64 long before the shift.
Addresses-Coverity: ("Unintended sign extension")
Fixes: f0c2982aaf98 ("octeontx2-pf: Add support for SR-IOV management function")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201118130520.460365-1-colin.king@canonical.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c index 4c82f60f3cf3..634d60655a74 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c @@ -2084,7 +2084,7 @@ static int otx2_do_set_vf_vlan(struct otx2_nic *pf, int vf, u16 vlan, u8 qos, vtag_req->vtag_size = VTAGSIZE_T4; vtag_req->cfg_type = 0; /* tx vlan cfg */ vtag_req->tx.cfg_vtag0 = 1; - vtag_req->tx.vtag0 = (ntohs(proto) << 16) | vlan; + vtag_req->tx.vtag0 = ((u64)ntohs(proto) << 16) | vlan; err = otx2_sync_mbox_msg(&pf->mbox); if (err) |