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Hannes Frederic Sowa f3d3342602 net: rework recvmsg handler msg_name and msg_namelen logic ... This patch now always passes msg->msg_namelen as 0. recvmsg handlers must set msg_namelen to the proper size <= sizeof(struct sockaddr_storage) to return msg_name to the user. This prevents numerous uninitialized memory leaks we had in the recvmsg handlers and makes it harder for new code to accidentally leak uninitialized memory. Optimize for the case recvfrom is called with NULL as address. We don't need to copy the address at all, so set it to NULL before invoking the recvmsg handler. We can do so, because all the recvmsg handlers must cope with the case a plain read() is called on them. read() also sets msg_name to NULL. Also document these changes in include/linux/net.h as suggested by David Miller. Changes since RFC: Set msg->msg_name = NULL if user specified a NULL in msg_name but had a non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't affect sendto as it would bail out earlier while trying to copy-in the address. It also more naturally reflects the logic by the callers of verify_iovec. With this change in place I could remove " if (!uaddr || msg_sys->msg_namelen == 0) msg->msg_name = NULL ". This change does not alter the user visible error logic as we ignore msg_namelen as long as msg_name is NULL. Also remove two unnecessary curly brackets in ___sys_recvmsg and change comments to netdev style. Cc: David Miller <davem@davemloft.net> Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>		11 years ago
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hci	…
nci	NFC: NCI: Modify NCI SPI to implement CS/INT handshake per the spec	12 years ago
Kconfig	…
Makefile	…
af_nfc.c	…
core.c	…
digital.h	NFC: digital: Remove PR_ERR and PR_DBG macros	12 years ago
digital_core.c	NFC: digital: Add newline to pr_* calls	12 years ago
digital_dep.c	NFC: digital: Add newline to pr_* calls	12 years ago
digital_technology.c	NFC: digital: Fix sens_res endiannes handling	12 years ago
llcp.h	…
llcp_commands.c	…
llcp_core.c	…
llcp_sock.c	net: rework recvmsg handler msg_name and msg_namelen logic	11 years ago
netlink.c	genetlink: make multicast groups const, prevent abuse	11 years ago
nfc.h	…
rawsock.c	net: rework recvmsg handler msg_name and msg_namelen logic	11 years ago