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(parent: a3967ba) | patch
bpf: Reject bpf_timer for PREEMPT_RT
authorLeon Hwang <leon.hwang@linux.dev>
Wed, 10 Sep 2025 12:57:39 +0000 (20:57 +0800)
committerAlexei Starovoitov <ast@kernel.org>
Wed, 10 Sep 2025 19:34:09 +0000 (12:34 -0700)
commite25ddfb388c8b7e5f20e3bf38d627fb485003781
tree537ac7643167b5f3e2c2db28f833ded5e72f519dtree
parenta3967baad4d533dc254c31e0d221e51c8d223d58commit | diff
bpf: Reject bpf_timer for PREEMPT_RT

When enable CONFIG_PREEMPT_RT, the kernel will warn when run timer
selftests by './test_progs -t timer':

BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48

In order to avoid such warning, reject bpf_timer in verifier when
PREEMPT_RT is enabled.

Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Link: https://lore.kernel.org/r/20250910125740.52172-2-leon.hwang@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
kernel/bpf/verifier.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)