ipv4: do compat setsockopt for MCAST_MSFILTER directly

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Parallel to what the native setsockopt() does, except that unlike
the native setsockopt() we do not use memdup_user() - we want
the sockaddr_storage fields properly aligned, so we allocate
4 bytes more and copy compat_group_filter at the offset 4,
which yields the proper alignments.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2020-03-30 15:39:43 -04:00

parent e986d4dabc

commit 2e04172875

1 changed files with 47 additions and 1 deletions

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48

net/ipv4/ip_sockglue.c

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