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ethtool: always write dev in ethnl_parse_header_dev_get

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Commit 0976b888a1 ("ethtool: fix null-ptr-deref on ref tracker")
made the write to req_info.dev conditional, but as Eric points out
in a different follow up the structure is often allocated on the
stack and not kzalloc()'d so seems safer to always write the dev,
in case it's garbage on input.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2021-12-14 07:47:25 -08:00 committed by David S. Miller
parent f1d9268e06
commit 3bc14ea0d1
1 changed files with 2 additions and 3 deletions
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3
net/ethtool/netlink.c
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@ -141,10 +141,9 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
return -EINVAL;
}
if (dev) {
req_info->dev = dev;
if (dev)
netdev_tracker_alloc(dev, &req_info->dev_tracker, GFP_KERNEL);
}
req_info->flags = flags;
return 0;
}