From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E70A43ACEEC for ; Mon, 9 Mar 2026 13:48:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773064125; cv=none; b=J685dzuwZuxHPFi1A3pDsuL3zcecbCtiifu9EDAsBeTfBoAtSZqqYKQazo8gK37xvw4NPaLWJLtOJyLYiSKIlFD2lvGPzjJaMSOJ8ZtbFGQed3zLNgmkKIz90WE+9FdPNGVfU/ulnBGW206PPRH1w1IePBOmLjWt+Ghx4pP7GEQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773064125; c=relaxed/simple; bh=HNqbIilc1SreZBFw3ha7FsIJ1bqCnco0lllRZkFOyHw=; h=From:Date:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=G8x0WkE3EGVC+VI+eRH+QItRzGUHbaItUyOuJ0vbb6isIu4N9gGr512nJU+3dk2ep160MaQwdeFzL/yCr+7wK7OoEhEZJKvUUm6KE6FhjBa65RXneydlr7/gId6wjQXEYYiC/xqUqQCjcqfDvvecO7RUuwJmcUqCs5CFKMtgUnI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=PK9xYz87; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PK9xYz87" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-4806cc07ce7so135125505e9.1 for ; Mon, 09 Mar 2026 06:48:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773064122; x=1773668922; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:date:from:from:to:cc:subject:date:message-id:reply-to; bh=HwbPRzrYRb3DSmMn3EZSpDSHTZpU4kRzz1hnRHszBWA=; b=PK9xYz875w0psGPkZrxMreQRAONntUP8+LtaDnU3dx4+IxEypHHxhA6Xzosaosste4 r51vDQ2Kta0GkpeMdjtw2SkUtcuTPzNN6+YfuMFAJZ7saLG56Vg505I1LJhhBYiO329T uQK+3iVDepmIzYN+R2g1UulIbvk63wLYt4a0Q7/woBGgMnTEK9NzTwFkhmqclpbx9tEM 9mcD4yQeX5gshsKX0BZ/9D7K7Cm2GM0t4v3KVNucomqamd+6JtQ1nuEhFhTvgBQdxr9e 8coeMz7XeH7CoMLf48vfFMS7kugkixmxSU5H08J1FYbgE79X/o+20FT1U57riTUti7c/ 5PWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773064122; x=1773668922; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:date:from:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=HwbPRzrYRb3DSmMn3EZSpDSHTZpU4kRzz1hnRHszBWA=; b=Cq9/11y1f5IcMCORCx7zFYa1+1foLAQe6w7RhXCJlFPVZBSWPckWRTWZLoZlBu8Ku4 3UsqLh/pBosLqcvRMih2B6WkY/WRABD8qbHQ/NR/spZUhXw1w0nB0ynAYoKR115zXPJZ yR+J+OayFeRWfL8Ta0croyDLTUZGIfHeHDpoiuc3gi5NBLqNs9bFN+hHSaimOEbcJYJ8 Wz3Ai8HRRN4a+A8uBRdBSh9pHavlpZDi7GlMx5/xTEY9qbRt6qWCtNutixvaZ3FB+fYA FW0NMik8H97/wg886dK0CQ4kQOFi/4UnkA7m6jg1iKUZ34Ng2ob1AFj6b6a3uQb/0FG7 QLhQ== X-Gm-Message-State: AOJu0YyDOOG+cQTVJa2TMcN5nT1R7WZER8BnnPiq+gQf897Cn5kPwXFm GfzuAxdeJezc3ve3/6QIHaA6bjhmb0th3FdTMWxWqfHd1+cQVvUPltAn X-Gm-Gg: ATEYQzzZ0fFNH2QwPYJypEtXdnxYiCD/jwJEARg7JRzv5BTc4juT961c9TSzV/qxXc6 14Ig9Ht5fNIWsWqFMCYClEeMUh4EAJtNtugjBIWm3q7Nsq/ZrpHv0dC5kRdARZzEoo3B2uhHqI+ ETk85ZPw6nClGdobpwZEmOilSb79ukpe1IdcfRrXXCFow8SE0jJzHBjISud71XB1XZa0OBVNNDq ItG/qyj0NX0FcgTxZnJD6RdrpB96M8jdczm7CgckqaGYkaOtL7M2vJnD2IbX3nJexKYGAyyp3RQ EDq3dMh+adhcJ1SwJHLYTOIR9vnrfxCTDUYaG54EQde28pZcGnZuNxY7lkDfpWk04Oz3o3Lqs1k qtLACGk9OVT/nqFXej3QPzdqjKsMItfu4haqk3UXW3YEGttB2jwU5BRZcvhHr1jUgkw2LNPjLxs bGnp905nTpABO5NIzHezohHbWt X-Received: by 2002:a05:600c:8209:b0:485:3aa1:a7f1 with SMTP id 5b1f17b1804b1-4853aa1a8a8mr64487045e9.7.1773064121724; Mon, 09 Mar 2026 06:48:41 -0700 (PDT) Received: from krava ([2a00:102a:5007:2415:42f:f06b:ba32:35b]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48531818b5asm85106915e9.3.2026.03.09.06.48.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Mar 2026 06:48:41 -0700 (PDT) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Mon, 9 Mar 2026 14:48:38 +0100 To: Viktor Malik Cc: bpf@vger.kernel.org, Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Stanislav Fomichev , Hao Luo , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Shuah Khan , Leon Hwang Subject: Re: [PATCH bpf-next v3 0/3] Always allow sleepable and fmod_ret programs on syscalls Message-ID: References: Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Mar 09, 2026 at 12:23:55PM +0100, Viktor Malik wrote: > Both sleepable and fmod_ret programs are only allowed on selected > functions. For convenience, the error injection list was originally > used. > > When error injection is disabled, that list is empty and sleepable > tracing programs, as well as fmod_ret programs, are effectively > unavailable. > > This patch series addresses the issue by at least enabling sleepable and > fmod_ret programs on syscalls, if error injection is disabled. More > details on why syscalls are used can be found in [1]. > > [1] https://lore.kernel.org/bpf/CAADnVQK6qP8izg+k9yV0vdcT-+=axtFQ2fKw7D-2Ei-V6WS5Dw@mail.gmail.com/ > > Changes in v3: > - Handle LoongArch (Leon) > - Add Kumar's and Leon's acks Acked-by: Jiri Olsa jirka > > Changes in v2: > - Check "sys_" prefix instead of "sys" for powerpc syscalls (AI review) > - Add link to the original discussion (Kumar) > - Add explanation why arch syscall prefixes are hard-coded (Leon) > > Viktor Malik (3): > bpf: Always allow sleepable programs on syscalls > bpf: Always allow fmod_ret programs on syscalls > selftests/bpf: Move sleepable refcounted_kptr tests to syscalls > > kernel/bpf/verifier.c | 85 ++++++++++++++++--- > .../selftests/bpf/progs/refcounted_kptr.c | 4 +- > .../bpf/progs/refcounted_kptr_fail.c | 2 +- > 3 files changed, 74 insertions(+), 17 deletions(-) > > -- > 2.53.0 >