ethtool: Allocate register dump buffer with vmalloc()

Some NICs have huge register files which exceed the maximum heap
allocation size.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 91ffce20c36b..dae2fd053c2b 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -815,7 +815,7 @@ static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
         if (regs.len > reglen)
                 regs.len = reglen;
 
-        regbuf = kmalloc(reglen, GFP_USER);
+        regbuf = vmalloc(reglen);
         if (!regbuf)
                 return -ENOMEM;
 
@@ -830,7 +830,7 @@ static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
         ret = 0;
 
  out:
-        kfree(regbuf);
+        vfree(regbuf);
         return ret;
 }