Commits
Anders Roxell committed fd92d6648fe
bpf: test_bpf: turn off preemption in function __run_once
When running BPF test suite the following splat occurs:
[ 415.930950] test_bpf: #0 TAX jited:0
[ 415.931067] BUG: assuming atomic context at lib/test_bpf.c:6674
[ 415.946169] in_atomic(): 0, irqs_disabled(): 0, pid: 11556, name: modprobe
[ 415.953176] INFO: lockdep is turned off.
[ 415.957207] CPU: 1 PID: 11556 Comm: modprobe Tainted: G W 5.0.0-rc7-next-20190220 #1
[ 415.966328] Hardware name: HiKey Development Board (DT)
[ 415.971592] Call trace:
[ 415.974069] dump_backtrace+0x0/0x160
[ 415.977761] show_stack+0x24/0x30
[ 415.981104] dump_stack+0xc8/0x114
[ 415.984534] __cant_sleep+0xf0/0x108
[ 415.988145] test_bpf_init+0x5e0/0x1000 [test_bpf]
[ 415.992971] do_one_initcall+0x90/0x428
[ 415.996837] do_init_module+0x60/0x1e4
[ 416.000614] load_module+0x1de0/0x1f50
[ 416.004391] __se_sys_finit_module+0xc8/0xe0
[ 416.008691] __arm64_sys_finit_module+0x24/0x30
[ 416.013255] el0_svc_common+0x78/0x130
[ 416.017031] el0_svc_handler+0x38/0x78
[ 416.020806] el0_svc+0x8/0xc
Rework so that preemption is disabled when we loop over function
'BPF_PROG_RUN(...)'.
Fixes: 568f196756ad ("bpf: check that BPF programs run with preemption disabled")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>