From nobody Sun Feb 8 21:42:23 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C53621E5B99; Sat, 1 Mar 2025 20:07:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740859655; cv=none; b=sI+a/Lwo0fDAkPf7EvGJzl0I5oOBxu80YiDY2mJYuLFKy4wa4x+g0Fhi8h8icfh3DhAtUiBax4qdcEXlHvCuCuxKgjNRjinQl/24FZp6XEBCMZBwoXUeflqBFEpTqARAjFO2e1tUjMiRcQcVyNrb8OrVqJkCfdo4oMNKLhbLls4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740859655; c=relaxed/simple; bh=siIwgLCP+PYUROXcl8Un5qVAjJz/1ZPp5jmjpGtrAtQ=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=SS1CaeItZuYpTCFdXUsV7EIUWB2WeQsmR0V+s//m8m28fILAKEIRzJlpQ7H+zSz2nLUa41cv7M02FCiP2hcYNQj+I0c3xcMoZkKr7fHEHpzchTHN4b3DxSnLmpVmNGv/9RkGterxhSiSV5MYGp4MC7qdDYVdBNXaxtS+kIl9pgk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=BM1RXNko; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=0AQJHoU/; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="BM1RXNko"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="0AQJHoU/" Date: Sat, 01 Mar 2025 20:07:31 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1740859652; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XTqFQq3Fp5mhQzd8bXGsgAFwl02ZpFz6VYhimWe4tqM=; b=BM1RXNkolTUBDx+wFGyTpCc/4TDOKrix8zb5IZ2W7TKTsesj7kKB9awdSzL7TkGJtfij9W mKHDFHHQr+ofpMFd0qe/POBDChdxocygKT+JPI5puOXmJnoUbsMgxq1oaAfvmSsKOFo6AS BU6/ivXaBexiillaNfa4lawtPTsKpFqujb1VxK3UOm8F+PYDs8+rnaYiCg36fUDQolQ6lp oNY7uZu6fPki7ldkJhiT27q/wBO3zJLrjqc6NcLG/KXbsrRrjka1/OBQRkdrdkbirBbU8k ygKzvQ1BUbuBvIxzcfSH/gWwcWIF2/jTMLofBR8vkyaDBN4vRoJ+E+ztxbGLGw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1740859652; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XTqFQq3Fp5mhQzd8bXGsgAFwl02ZpFz6VYhimWe4tqM=; b=0AQJHoU/8AMmO0q7z7oE9WMaOQenxMFWS2PIM/uE4kaTi3Qr2uKWouOHHOb3vWENtqnIqe laYk07v8VpdeBIAA== From: "tip-bot2 for Peter Zijlstra" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: perf/core] perf/bpf: Robustify perf_event_free_bpf_prog() Cc: "Peter Zijlstra (Intel)" , Ingo Molnar , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20241104135518.978956692@infradead.org> References: <20241104135518.978956692@infradead.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <174085965159.10177.16975783024452627213.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the perf/core branch of tip: Commit-ID: 26700b1359a121c42eb7517e053a86b07466b79b Gitweb: https://git.kernel.org/tip/26700b1359a121c42eb7517e053a86b07= 466b79b Author: Peter Zijlstra AuthorDate: Mon, 04 Nov 2024 14:39:22 +01:00 Committer: Ingo Molnar CommitterDate: Sat, 01 Mar 2025 20:06:47 +01:00 perf/bpf: Robustify perf_event_free_bpf_prog() Ensure perf_event_free_bpf_prog() is safe to call a second time; notably without making any references to event->pmu when there is no prog left. Note: perf_event_detach_bpf_prog() might leave a stale event->prog Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Link: https://lore.kernel.org/r/20241104135518.978956692@infradead.org --- kernel/events/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/events/core.c b/kernel/events/core.c index 525c64e..ab4e497 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -10905,6 +10905,9 @@ int perf_event_set_bpf_prog(struct perf_event *even= t, struct bpf_prog *prog, =20 void perf_event_free_bpf_prog(struct perf_event *event) { + if (!event->prog) + return; + if (!perf_event_is_tracing(event)) { perf_event_free_bpf_handler(event); return;