From: Dag Moxnes <dag.moxnes@xxxxxxxxxx> Date: Fri, 23 Aug 2019 16:03:18 +0200 > Add the RDMA cookie and RX timestamp to the usercopy whitelist. > > After the introduction of hardened usercopy whitelisting > (https://lwn.net/Articles/727322/), a warning is displayed when the > RDMA cookie or RX timestamp is copied to userspace: > > kernel: WARNING: CPU: 3 PID: 5750 at > mm/usercopy.c:81 usercopy_warn+0x8e/0xa6 > [...] > kernel: Call Trace: > kernel: __check_heap_object+0xb8/0x11b > kernel: __check_object_size+0xe3/0x1bc > kernel: put_cmsg+0x95/0x115 > kernel: rds_recvmsg+0x43d/0x620 [rds] > kernel: sock_recvmsg+0x43/0x4a > kernel: ___sys_recvmsg+0xda/0x1e6 > kernel: ? __handle_mm_fault+0xcae/0xf79 > kernel: __sys_recvmsg+0x51/0x8a > kernel: SyS_recvmsg+0x12/0x1c > kernel: do_syscall_64+0x79/0x1ae > > When the whitelisting feature was introduced, the memory for the RDMA > cookie and RX timestamp in RDS was not added to the whitelist, causing > the warning above. > > Signed-off-by: Dag Moxnes <dag.moxnes@xxxxxxxxxx> > Tested-by: jenny.x.xu@xxxxxxxxxx Applied, with tested-by tag fixed. Thanks.
