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X-OriginatorOrg: seco.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jul 2024 14:50:50.9974 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 82660a93-6e23-41c2-419f-08dc9aa65dee X-MS-Exchange-CrossTenant-Id: bebe97c3-6438-442e-ade3-ff17aa50e733 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=bebe97c3-6438-442e-ade3-ff17aa50e733;Ip=[20.160.56.87];Helo=[repost-eu.tmcas.trendmicro.com] X-MS-Exchange-CrossTenant-AuthSource: DB1PEPF000509E5.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAVPR03MB10142 On 7/2/24 10:01, Aleksandr Mishin wrote: > [You don't often get email from amishin@t-argos.ru. Learn why this is imp= ortant at https://cas5-0-urlprotect.trendmicro.com:443/wis/clicktime/v1/que= ry?url=3Dhttps%3a%2f%2faka.ms%2fLearnAboutSenderIdentification&umid=3Dca782= a5b-a3fd-4738-b50c-ffbd8e52e50f&auth=3Dd807158c60b7d2502abde8a2fc01f4066298= 0862-ac0deac714bbe85d389fd2711a17d0113034b3ca ] > > Cell-index value is obtained from Device Tree and then used to calculate > the index for accessing arrays port_mfl[], mac_mfl[] and intr_mng[]. > In case of broken DT due to any error cell-index can contain any value > and it is possible to go beyond the array boundaries which can lead > at least to memory corruption. > Validate cell-index value obtained from Device Tree. > > Found by Linux Verification Center (linuxtesting.org) with SVACE. > > Fixes: 414fd46e7762 ("fsl/fman: Add FMan support") > Signed-off-by: Aleksandr Mishin > --- > v1->v2: Move check to mac.c to avoid allmodconfig build errors and refere= nce leaks > > drivers/net/ethernet/freescale/fman/fman.c | 1 - > drivers/net/ethernet/freescale/fman/fman.h | 3 +++ > drivers/net/ethernet/freescale/fman/mac.c | 4 ++++ > 3 files changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/freescale/fman/fman.c b/drivers/net/eth= ernet/freescale/fman/fman.c > index d96028f01770..fb416d60dcd7 100644 > --- a/drivers/net/ethernet/freescale/fman/fman.c > +++ b/drivers/net/ethernet/freescale/fman/fman.c > @@ -24,7 +24,6 @@ > > /* General defines */ > #define FMAN_LIODN_TBL 64 /* size of LIODN table */ > -#define MAX_NUM_OF_MACS 10 > #define FM_NUM_OF_FMAN_CTRL_EVENT_REGS 4 > #define BASE_RX_PORTID 0x08 > #define BASE_TX_PORTID 0x28 > diff --git a/drivers/net/ethernet/freescale/fman/fman.h b/drivers/net/eth= ernet/freescale/fman/fman.h > index 2ea575a46675..74eb62eba0d7 100644 > --- a/drivers/net/ethernet/freescale/fman/fman.h > +++ b/drivers/net/ethernet/freescale/fman/fman.h > @@ -74,6 +74,9 @@ > #define BM_MAX_NUM_OF_POOLS 64 /* Buffers pools */ > #define FMAN_PORT_MAX_EXT_POOLS_NUM 8 /* External BM pools per Rx po= rt */ > > +/* General defines */ > +#define MAX_NUM_OF_MACS 10 > + > struct fman; /* FMan data */ > > /* Enum for defining port types */ > diff --git a/drivers/net/ethernet/freescale/fman/mac.c b/drivers/net/ethe= rnet/freescale/fman/mac.c > index 9767586b4eb3..ac9ad5e67b44 100644 > --- a/drivers/net/ethernet/freescale/fman/mac.c > +++ b/drivers/net/ethernet/freescale/fman/mac.c > @@ -247,6 +247,10 @@ static int mac_probe(struct platform_device *_of_dev= ) > dev_err(dev, "failed to read cell-index for %pOF\n", mac_= node); > return -EINVAL; > } > + if (val >=3D MAX_NUM_OF_MACS) { > + dev_err(dev, "cell-index value is too big for %pOF\n", ma= c_node); > + return -EINVAL; > + } > priv->cell_index =3D (u8)val; > > /* Get the MAC address */ > -- > 2.30.2 > Reviewed-by: Sean Anderson [StudioX, SECO SpA]