diff options
| author | Markus Elfring <elfring@users.sourceforge.net> | 2016-08-20 08:54:15 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-20 19:11:33 -0700 |
| commit | 28e8190d2fb3918b5d46acafeb1968cd26e30dad (patch) | |
| tree | 125705e420781a355423c14d6c159f21e059612d /drivers/net/tun.c | |
| parent | 4825a4e42c7e61520038c7d7d3efb4ffbbbd7091 (diff) | |
tun: Use memdup_user() rather than duplicating its implementation
Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 9c8b5bc2b9d8..a1aeccbce6d4 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -731,14 +731,9 @@ static int update_filter(struct tap_filter *filter, void __user *arg) } alen = ETH_ALEN * uf.count; - addr = kmalloc(alen, GFP_KERNEL); - if (!addr) - return -ENOMEM; - - if (copy_from_user(addr, arg + sizeof(uf), alen)) { - err = -EFAULT; - goto done; - } + addr = memdup_user(arg + sizeof(uf), alen); + if (IS_ERR(addr)) + return PTR_ERR(addr); /* The filter is updated without holding any locks. Which is * perfectly safe. We disable it first and in the worst |