Disable BPF on PREEMPT_RT because - it allocates and frees memory in atomic context - it uses up_read_non_owner() - BPF_PROG_RUN() expects to be invoked in non-preemptible context Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> --- I tried to fix the memory allocations in http://lkml.kernel.org/r/20190410143025.11997-1-bigeasy@xxxxxxxxxxxxx but I have no idea how to address the other two issues. init/Kconfig | 1 + net/kcm/Kconfig | 1 + 2 files changed, 2 insertions(+) --- a/init/Kconfig +++ b/init/Kconfig @@ -1629,6 +1629,7 @@ config KALLSYMS_BASE_RELATIVE # syscall, maps, verifier config BPF_SYSCALL bool "Enable bpf() system call" + depends on !PREEMPT_RT select BPF select IRQ_WORK default n --- a/net/kcm/Kconfig +++ b/net/kcm/Kconfig @@ -3,6 +3,7 @@ config AF_KCM tristate "KCM sockets" depends on INET + depends on !PREEMPT_RT select BPF_SYSCALL select STREAM_PARSER ---help---
