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Sat, 14 Nov 2026 04:48:46 -0800 (PST) From: Ritesh Harjani (IBM) To: Karl Mehltretter , Hari Bathini , "Christophe Leroy (CS GROUP)" , Madhavan Srinivasan Cc: Karl Mehltretter , Naveen N Rao , Michael Ellerman , Nicholas Piggin , Abhishek Dubey , Dan Carpenter , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kernel test robot Subject: Re: [PATCH] powerpc32/bpf: return false from bpf_jit_supports_fsession() on ppc32 In-Reply-To: <20261003184226.76740-1-kmehltretter@gmail.com> Date: Sat, 14 Nov 2026 18:06:33 +0530 Message-ID: References: <20261003184226.76740-1-kmehltretter@gmail.com> X-Mailing-List: bpf@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Karl Mehltretter writes: > bpf_jit_supports_fsession() returns bool. Commit 92258b5bf1ec > ("powerpc32/bpf: Add fsession support") made it return -EOPNOTSUPP on > ppc32 until fsession is validated there. The negative value converts to > true, so the verifier does not reject fsession programs on ppc32. Such a > program loads, and only attaching it fails because > __arch_prepare_bpf_trampoline() returns -EOPNOTSUPP on ppc32. > > Return false instead. The load then fails with "JIT does not support > fsession". Tested with a ppc32 kernel on QEMU g3beige. > Fair enough. > Fixes: 92258b5bf1ec ("powerpc32/bpf: Add fsession support") > Reported-by: kernel test robot > Reported-by: Dan Carpenter > Closes: https://lore.kernel.org/r/202608010958.cYfBCQAC-lkp@intel.com/ > Assisted-by: LLM > Signed-off-by: Karl Mehltretter > --- > arch/powerpc/net/bpf_jit_comp.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Sorry, I guess, this must have falled through the cracks. Should mostly get queued for next -rc release. LGTM. Feel free to add: Reviewed-by: Ritesh Harjani (IBM)