Re: [PATCH net] rxrpc: Work around usercopy check
From: David HowellsDate: Thu, 15 Feb 2018 22:59:00 + > Due to a check recently added to copy_to_user(), it's now not permitted to > copy from slab-held data to userspace unless the slab is whitelisted. This > affects rxrpc_recvmsg() when it attempts to place an RXRPC_USER_CALL_ID > control message in the userspace control message buffer. A warning is > generated by usercopy_warn() because the source is the copy of the > user_call_ID retained in the rxrpc_call struct. > > Work around the issue by copying the user_call_ID to a variable on the > stack and passing that to put_cmsg(). > > The warning generated looks like: ... > Reported-by: Jonathan Billings > Signed-off-by: David Howells > Acked-by: Kees Cook > Tested-by: Jonathan Billings Applied, thanks David.
Re: [PATCH net] rxrpc: Work around usercopy check
From: David Howells Date: Thu, 15 Feb 2018 22:59:00 + > Due to a check recently added to copy_to_user(), it's now not permitted to > copy from slab-held data to userspace unless the slab is whitelisted. This > affects rxrpc_recvmsg() when it attempts to place an RXRPC_USER_CALL_ID > control message in the userspace control message buffer. A warning is > generated by usercopy_warn() because the source is the copy of the > user_call_ID retained in the rxrpc_call struct. > > Work around the issue by copying the user_call_ID to a variable on the > stack and passing that to put_cmsg(). > > The warning generated looks like: ... > Reported-by: Jonathan Billings > Signed-off-by: David Howells > Acked-by: Kees Cook > Tested-by: Jonathan Billings Applied, thanks David.