Messages in this thread | | | Date | Wed, 11 Sep 2013 22:44:26 +0400 | From | Sergei Shtylyov <> | Subject | Re: drivers/net/ethernet/nvidia/forcedeth.c saved_config_space[size] access patch |
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Hello.
On 09/09/2013 03:39 AM, Marc Weber wrote:
> 1) VER3 and _MAX are of same size: > #define NV_PCI_REGSZ_VER3 0x604 > #define NV_PCI_REGSZ_MAX 0x604
> 2) It looks like there is a case where VER3 get's assigned to > register_size:
> if (id->driver_data & > (DEV_HAS_VLAN|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_STATISTICS_V2|DEV_HAS_STATISTICS_V > np->register_size = NV_PCI_REGSZ_VER3;
> 3) the definition of saved_config_space is MAX divided by 4 (size of u32) > struct fe_priv { > [...] > u32 saved_config_space[NV_PCI_REGSZ_MAX/4]
> 4) This doesn't stop loop at [size-1]: > Thus there is the risk that it overrides the field after > saved_config_space. If that's desired behaviour at least a comment > is missing IMHO:
> for (i = 0; i <= np->register_size/sizeof(u32); i++) > np->saved_config_space[i] = readl(base + i*sizeof(u32));
> Such for loop is used twice in forcedeth.c
> Patch againstn 4de9ad9bc08 (Fri Sep 6 11:14:33) attached fixing both > using < instead of <=.
> If you think I've hit a small bug just fix and commit. > I don't care much about my ownership of this patch.
> I didn't test this patch because I don't have the hardware and I think > its a trivial case.
Don't attach the patches, send them inline instead. And please mark the mails with patches with [PATCH] in the subject.
> Marc Weber
WBR, Sergei
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