From: Kangjie Lu <kjlu@xxxxxxx> [ Upstream commit 26fd962bde0b15e54234fe762d86bc0349df1de4 ] niu_pci_eeprom_read() may fail, so we should check its return value before using the read data. Signed-off-by: Kangjie Lu <kjlu@xxxxxxx> Acked-by: Shannon Nelson <shannon.lee.nelson@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/ethernet/sun/niu.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c index 68738aa8e218..e87bded39781 100644 --- a/drivers/net/ethernet/sun/niu.c +++ b/drivers/net/ethernet/sun/niu.c @@ -8131,6 +8131,8 @@ static int niu_pci_vpd_scan_props(struct niu *np, u32 start, u32 end) start += 3; prop_len = niu_pci_eeprom_read(np, start + 4); + if (prop_len < 0) + return prop_len; err = niu_pci_vpd_get_propname(np, start + 5, namebuf, 64); if (err < 0) return err; @@ -8175,8 +8177,12 @@ static int niu_pci_vpd_scan_props(struct niu *np, u32 start, u32 end) netif_printk(np, probe, KERN_DEBUG, np->dev, "VPD_SCAN: Reading in property [%s] len[%d]\n", namebuf, prop_len); - for (i = 0; i < prop_len; i++) - *prop_buf++ = niu_pci_eeprom_read(np, off + i); + for (i = 0; i < prop_len; i++) { + err = niu_pci_eeprom_read(np, off + i); + if (err >= 0) + *prop_buf = err; + ++prop_buf; + } } start += len; -- 2.19.1