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Re: [Qemu-trivial] [PATCH] PCI: add param check for api
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-trivial] [PATCH] PCI: add param check for api |
Date: |
Mon, 11 Jan 2016 10:20:59 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 |
On 11/01/2016 09:32, Michael Tokarev wrote:
>> >
>> > + assert(size > 0);
>> > + assert(offset >= PCI_CONFIG_HEADER_SIZE || !offset);
>> > +
> I'd like to see some ACKs/Reviews for this one, in particular why
> size should be != 0.
In fact it should be >= 2, because two bytes are always written below:
config = pdev->config + offset;
config[PCI_CAP_LIST_ID] = cap_id;
config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST];
> Also either move offset assert to the below
> "else" clause or rewrite it to be offset == 0 instead if !offset :)
Good idea to move it below, or even to add
assert(offset >= PCI_CONFIG_HEADER_SIZE);
after the "if", before the "config" assignment.
Paolo