bpf: Reject bpf_timer for PREEMPT_RT

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[ Upstream commit e25ddfb388 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Leon Hwang 2025-09-10 20:57:39 +08:00 • committed by Greg Kroah-Hartman

parent 9ebf862184

commit d51c6b5198

1 changed files with 4 additions and 0 deletions

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kernel/bpf/verifier.c

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