bpf: Check active lock count in in_sleepable_context()

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The in_sleepable_context() function is used to specialize the BPF code
in do_misc_fixups(). With the addition of nonsleepable arena kfuncs,
there are kfuncs whose specialization depends on whether we are
holding a lock. We should use the nonsleepable version while
holding a lock and the sleepable one when not.

Add a check for active_locks to account for locking when specializing
arena kfuncs.

Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/r/20260106-arena-under-lock-v2-1-378e9eab3066@etsalapatis.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Emil Tsalapatis 2026-01-06 18:36:43 -05:00 • committed by Alexei Starovoitov

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commit b25b48c7d3

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kernel/bpf/verifier.c

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