4.4-stable review patch. If anyone has any objections, please let me know.
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[ 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@umn.edu Acked-by: Shannon Nelson shannon.lee.nelson@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- 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 ccebf89aa1e4..85f3a2c0d4dd 100644 --- a/drivers/net/ethernet/sun/niu.c +++ b/drivers/net/ethernet/sun/niu.c @@ -8121,6 +8121,8 @@ 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; @@ -8165,8 +8167,12 @@ 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;