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| author | David S. Miller <davem@davemloft.net> | 2009-09-30 16:12:20 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-30 16:12:20 -0700 |
| commit | b7058842c940ad2c08dd829b21e5c92ebe3b8758 (patch) | |
| tree | 5fe78d599fc345ca0bcd4b083b79095a54b2921b /net/compat.c | |
| parent | eb1cf0f8f7a9e5a6d573d5bd72c015686a042db0 (diff) | |
| download | lwn-b7058842c940ad2c08dd829b21e5c92ebe3b8758.tar.gz lwn-b7058842c940ad2c08dd829b21e5c92ebe3b8758.zip | |
net: Make setsockopt() optlen be unsigned.
This provides safety against negative optlen at the type
level instead of depending upon (sometimes non-trivial)
checks against this sprinkled all over the the place, in
each and every implementation.
Based upon work done by Arjan van de Ven and feedback
from Linus Torvalds.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/compat.c')
| -rw-r--r-- | net/compat.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/net/compat.c b/net/compat.c index 12728b17a226..a407c3addbae 100644 --- a/net/compat.c +++ b/net/compat.c @@ -331,7 +331,7 @@ struct compat_sock_fprog { }; static int do_set_attach_filter(struct socket *sock, int level, int optname, - char __user *optval, int optlen) + char __user *optval, unsigned int optlen) { struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); @@ -351,7 +351,7 @@ static int do_set_attach_filter(struct socket *sock, int level, int optname, } static int do_set_sock_timeout(struct socket *sock, int level, - int optname, char __user *optval, int optlen) + int optname, char __user *optval, unsigned int optlen) { struct compat_timeval __user *up = (struct compat_timeval __user *) optval; struct timeval ktime; @@ -373,7 +373,7 @@ static int do_set_sock_timeout(struct socket *sock, int level, } static int compat_sock_setsockopt(struct socket *sock, int level, int optname, - char __user *optval, int optlen) + char __user *optval, unsigned int optlen) { if (optname == SO_ATTACH_FILTER) return do_set_attach_filter(sock, level, optname, @@ -385,7 +385,7 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname, } asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, - char __user *optval, int optlen) + char __user *optval, unsigned int optlen) { int err; struct socket *sock; @@ -558,8 +558,8 @@ struct compat_group_filter { int compat_mc_setsockopt(struct sock *sock, int level, int optname, - char __user *optval, int optlen, - int (*setsockopt)(struct sock *,int,int,char __user *,int)) + char __user *optval, unsigned int optlen, + int (*setsockopt)(struct sock *,int,int,char __user *,unsigned int)) { char __user *koptval = optval; int koptlen = optlen; |