6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Aleksandr Mishin <amishin@xxxxxxxxxx> [ Upstream commit bd50c4125c98bd1a86f8e514872159700a9c678c ] 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. Reviewed-by: Sean Anderson <sean.anderson@xxxxxxxx> Signed-off-by: Aleksandr Mishin <amishin@xxxxxxxxxx> Link: https://patch.msgid.link/20241028065824.15452-1-amishin@xxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/ethernet/freescale/fman/fman.c | 1 - drivers/net/ethernet/freescale/fman/fman.h | 3 +++ drivers/net/ethernet/freescale/fman/mac.c | 5 +++++ 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/fman/fman.c b/drivers/net/ethernet/freescale/fman/fman.c index d96028f01770c..fb416d60dcd72 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/ethernet/freescale/fman/fman.h index 2ea575a46675b..74eb62eba0d7f 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 port */ +/* 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/ethernet/freescale/fman/mac.c index 11da139082e1b..1916a2ac48b9f 100644 --- a/drivers/net/ethernet/freescale/fman/mac.c +++ b/drivers/net/ethernet/freescale/fman/mac.c @@ -259,6 +259,11 @@ static int mac_probe(struct platform_device *_of_dev) err = -EINVAL; goto _return_dev_put; } + if (val >= MAX_NUM_OF_MACS) { + dev_err(dev, "cell-index value is too big for %pOF\n", mac_node); + err = -EINVAL; + goto _return_dev_put; + } priv->cell_index = (u8)val; /* Get the MAC address */ -- 2.43.0
