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ip*_mc_gsfget(): lift copyout of struct group_filter into callers

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pass the userland pointer to the array in its tail, so that part
gets copied out by our functions; copyout of everything else is
done in the callers.  Rationale: reuse for compat; the array
is the same in native and compat, the layout of parts before it
is different for compat.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2020-03-29 17:18:30 -04:00
parent e9c375fb5e
commit 931ca7ab7f
6 changed files with 38 additions and 31 deletions
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2
include/net/ipv6.h
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@@ -1138,7 +1138,7 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
struct group_source_req *pgsr);
int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
struct group_filter __user *optval, int __user *optlen);
struct sockaddr_storage __user *p);
#ifdef CONFIG_PROC_FS
int ac6_proc_init(struct net *net);