Dear Genodians,

I have been successfully playing around with Networking in the 16.XX releases using the linux_x86 platform as a target. My genode instance used to run in a Ubuntu 14.04 LTS VM with a Windows host. Despite the "creative" setup, the tun/tap setup bridged with one of the VM's adapters worked like a charm.

After a jump to 18.11, using the linux platform as a target, I am experiencing troubles with the linux_nic_drv: The creation the driver component seems to fail during the creation of the file descriptors for its dataspaces: lx_mmap in _map_local fails with 22 (EINVAL) (see attached console output from the lwip_lx example).

I tested under Ubuntu 14.04 LTS in my old build environment as well as on a vanilla 16.04 LTS with a freshly installed genode toolchain & the current master. Other examples, such as the demo scenario, run without any problems.

I have found an older discussion on the list from 2014 about failed memory mappings, but the thread ended without coming to a real conclusion. I'd be more than glad for any idea what where to look for possible reasons for this behavior.

Best regards, Chris

======= console log, for run/lwip_lx ===========

using 'core-linux' as 'core' using 'linux_timer_drv' as 'timer' using 'ld-linux.lib.so' as 'ld.lib.so' spawn ./core Genode 18.11-117-ged65267 <local changes> 17592186044415 MiB RAM and 8998 caps assigned to init [init] parent provides [init] service "ROM" [init] service "IRQ" [init] service "IO_MEM" [init] service "IO_PORT" [init] service "PD" [init] service "RM" [init] service "CPU" [init] service "LOG" [init] child "timer" [init] RAM quota: 776K [init] cap quota: 68 [init] ELF binary: timer [init] priority: 0 [init] provides service Timer [init] child "linux_nic_drv" [init] RAM quota: 3848K [init] cap quota: 68 [init] ELF binary: linux_nic_drv [init] priority: 0 [init] provides service Nic [init] child "test-lwip_httpsrv" [init] RAM quota: 4872K [init] cap quota: 68 [init] ELF binary: test-lwip_httpsrv [init] priority: 0 [init -> linux_nic_drv] Error: _map_local: lx_mmap failed(addr_in=0x0, addr_out=0xffffffffffffffea/-22) overmap=0 [init -> linux_nic_drv] Error: LD: exception during program load: 'Genode::Region_map::Region_conflict' [init -> linux_nic_drv] Error: Uncaught exception of type 'Genode::Region_map::Region_conflict' [init -> linux_nic_drv] Warning: abort called - thread: ep Warning: blocking canceled in entrypoint constructor [init] child "linux_nic_drv" exited with exit value 1 [init -> test-lwip_httpsrv] Error: LD: symbol not found: '_nsyyin' [init -> test-lwip_httpsrv] Error: Uncaught exception of type 'Linker::Not_found' [init -> test-lwip_httpsrv] Warning: abort called - thread: ep [init] child "test-lwip_httpsrv" exited with exit value 1 [init] child "timer" announces service "Timer"